VisualStyleRenderer VisualStyleRenderer VisualStyleRenderer VisualStyleRenderer Class

定义

提供用于绘制和获取有关 VisualStyleElement 的信息的方法。Provides methods for drawing and getting information about a VisualStyleElement. 此类不能被继承。This class cannot be inherited.

public ref class VisualStyleRenderer sealed
public sealed class VisualStyleRenderer
type VisualStyleRenderer = class
Public NotInheritable Class VisualStyleRenderer
继承
VisualStyleRendererVisualStyleRendererVisualStyleRendererVisualStyleRenderer

示例

下面的代码示例使用VisualStyleRenderer类,以实现自定义控件,用于模拟某些窗口,其中包括使用标题栏拖动、 调整大小控点,使用重设大小和关闭的基本 UI。The following code example uses the VisualStyleRenderer class to implement a custom control that simulates some of the basic UI of a window, including dragging with the title bar, resizing with the sizing handle, and closing. 此示例中使用多个VisualStyleElement对象表示一个窗口,其中包括通过公开的元素的标准组成部分VisualStyleElement.Window.CaptionVisualStyleElement.Window.CloseButton,和VisualStyleElement.Status.Gripper类。This example uses several VisualStyleElement objects that represent standard parts of a window, including the elements exposed by the VisualStyleElement.Window.Caption, VisualStyleElement.Window.CloseButton, and VisualStyleElement.Status.Gripper classes.

#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
#using <System.dll>

using namespace System;
using namespace System::Text;
using namespace System::Drawing;
using namespace System::Drawing::Drawing2D;
using namespace System::Collections::Generic;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::VisualStyles;

namespace VisualStyleRendererSample
{

    public ref class WindowSimulation : public Control
    {
    private:
        Dictionary<String^, VisualStyleElement^>^ windowElements;
        Dictionary<String^, Rectangle>^ elementRectangles;
        VisualStyleRenderer^ renderer;
        Point closeButtonOffset;
        System::Drawing::Size gripperSize;
        System::Drawing::Size closeButtonSize;
        bool isResizing;
        bool isMoving;
        bool isClosing;
        int captionHeight;
        int frameThickness;
        int statusHeight;
        Point originalClick;
        Point resizeOffset;

    public:
        WindowSimulation() : Control()
        {
            statusHeight = 22;
            windowElements = gcnew Dictionary<String^, VisualStyleElement^>();
            elementRectangles = gcnew Dictionary<String^, Rectangle>();
            this->Location = Point(50, 50);
            this->Size = System::Drawing::Size(350, 300);
            this->BackColor = Color::Azure;
            this->DoubleBuffered = true;
            this->MinimumSize = System::Drawing::Size(300, 200);
            this->Font = SystemFonts::CaptionFont;
            this->Text = "Simulated Window";

            // Insert the VisualStyleElement objects into the Dictionary.
            windowElements->Add("windowCaption",
                VisualStyleElement::Window::Caption::Active);
            windowElements->Add("windowBottom",
                VisualStyleElement::Window::FrameBottom::Active);
            windowElements->Add("windowLeft",
                VisualStyleElement::Window::FrameLeft::Active);
            windowElements->Add("windowRight",
                VisualStyleElement::Window::FrameRight::Active);
            windowElements->Add("windowClose",
                VisualStyleElement::Window::CloseButton::Normal);
            windowElements->Add("statusBar",
                VisualStyleElement::Status::Bar::Normal);
            windowElements->Add("statusGripper",
                VisualStyleElement::Status::Gripper::Normal);

            // Get the sizes and location offsets for the window parts
            // as specified by the visual style, and then use this
            // information to calcualate the rectangles for each part.
            GetPartDetails();
            CalculateRectangles();

            this->MouseDown +=
                gcnew MouseEventHandler(this,
                    &WindowSimulation::ImitationWindow_MouseDown);
            this->MouseUp +=
                gcnew MouseEventHandler(this,
                    &WindowSimulation::ImitationWindow_MouseUp);
            this->MouseMove +=
                gcnew MouseEventHandler(this,
                    &WindowSimulation::ImitationWindow_MouseMove);
        }

        // Get the sizes and offsets for the window parts as specified
        // by the visual style.
    private:
        void GetPartDetails()
        {
            // Do nothing further if visual styles are not enabled.
            if (!Application::RenderWithVisualStyles)
            {
                return;
            }

            Graphics^ g = this->CreateGraphics();

            // Get the size and offset of the close button.
            if (SetRenderer(windowElements["windowClose"]))
            {
                closeButtonSize =
                    renderer->GetPartSize(g, ThemeSizeType::True);
                closeButtonOffset =
                    renderer->GetPoint(PointProperty::Offset);
            }

            // Get the height of the window caption.
            if (SetRenderer(windowElements["windowCaption"]))
            {
                captionHeight = renderer->GetPartSize(g,
                    ThemeSizeType::True).Height;
            }

            // Get the thickness of the left, bottom,
            // and right window frame.
            if (SetRenderer(windowElements["windowLeft"]))
            {
                frameThickness = renderer->GetPartSize(g,
                    ThemeSizeType::True).Width;
            }

            // Get the size of the resizing gripper.
            if (SetRenderer(windowElements["statusGripper"]))
            {
                gripperSize = renderer->GetPartSize(g,
                    ThemeSizeType::True);
            }

        }

        // Use the part metrics to determine the current size
        // of the rectangles for all of the window parts.
    private:
        void CalculateRectangles()
        {
            int heightMinusFrame =
                ClientRectangle.Height - frameThickness;

            // Calculate the window frame rectangles and add them
            // to the Dictionary of rectangles.
            elementRectangles["windowCaption"] = Rectangle(0, 0,
                ClientRectangle.Width, captionHeight);
            elementRectangles["windowBottom"] = Rectangle(0,
                heightMinusFrame, ClientRectangle.Width, frameThickness);
            elementRectangles["windowLeft"] = Rectangle(0, captionHeight,
                frameThickness, heightMinusFrame - captionHeight);
            elementRectangles["windowRight"] = Rectangle(
                ClientRectangle.Width - frameThickness, captionHeight,
                frameThickness, heightMinusFrame - captionHeight);

            // Calculate the window button rectangle and add it
            // to the Dictionary of rectangles.
            elementRectangles["windowClose"] =
                Rectangle(ClientRectangle.Right +
                    closeButtonOffset.X, closeButtonOffset.Y,
                    closeButtonSize.Width, closeButtonSize.Height);

            // Calculate the status bar rectangles and add them
            // to the Dictionary of rectangles.
            elementRectangles["statusBar"] =
                Rectangle(frameThickness,
                    heightMinusFrame - statusHeight,
                    ClientRectangle.Width - (2 * frameThickness),
                    statusHeight);
            elementRectangles["statusGripper"] =
                Rectangle(ClientRectangle.Right -
                gripperSize.Width - frameThickness,
                heightMinusFrame - gripperSize.Height,
                gripperSize.Width, gripperSize.Height);
        }

    protected:
        virtual void OnPaint(PaintEventArgs^ e) override
        {
            __super::OnPaint(e);

            // Ensure that visual styles are supported.
            if (!Application::RenderWithVisualStyles)
            {
                this->Text = "Visual styles are not enabled.";
                TextRenderer::DrawText(e->Graphics, this->Text,
                    this->Font, this->Location, this->ForeColor);
                return;
            }

            // Set the clip region to define the curved corners
            // of the caption.
            SetClipRegion();

            // Draw each part of the window.
            for each(KeyValuePair<String^, VisualStyleElement^>^ entry
                in windowElements)
            {
                if (SetRenderer(entry->Value))
                {
                    renderer->DrawBackground(e->Graphics,
                        elementRectangles[entry->Key]);
                }
            }

            // Draw the caption text.
            TextRenderer::DrawText(e->Graphics, this->Text, this->Font,
                elementRectangles["windowCaption"], Color::White,
                TextFormatFlags::VerticalCenter |
                TextFormatFlags::HorizontalCenter);
        }
private:
        // Initiate dragging, resizing, or closing the imitation window.
        void ImitationWindow_MouseDown(Object^ sender, MouseEventArgs^ e)
        {
            // The user clicked the close button.
            if (elementRectangles["windowClose"].Contains(e->Location))
            {
                windowElements["windowClose"] =
                    VisualStyleElement::Window::CloseButton::Pressed;
                isClosing = true;
            }

            // The user clicked the status grip.
            else if (elementRectangles["statusGripper"].Contains(e->Location))
            {
                isResizing = true;
                this->Cursor = Cursors::SizeNWSE;
                resizeOffset.X = this->Right - this->Left - e->X;
                resizeOffset.Y = this->Bottom - this->Top - e->Y;
            }

            // The user clicked the window caption.
            else if (elementRectangles["windowCaption"].Contains(e->Location))
            {
                isMoving = true;
                originalClick.X = e->X;
                originalClick.Y = e->Y;
            }

            Invalidate();
        }

        // Stop any current resizing or moving actions.
        void ImitationWindow_MouseUp(Object^ sender, MouseEventArgs^ e)
        {
            // Stop moving the location of the window rectangles.
            if (isMoving)
            {
                isMoving = false;
            }

            // Change the cursor back to the default if the user
            // stops resizing.
            else if (isResizing)
            {
                isResizing = false;
            }

            // Close the application if the user clicks the
            // close button.
            else if (elementRectangles["windowClose"].Contains(e->Location) 
                && isClosing)
            {
                Application::Exit();
            }
        }

        // Handle resizing or moving actions.
        void ImitationWindow_MouseMove(Object^ sender,
            MouseEventArgs^ e)
        {
            // The left mouse button is down.
            if ((::MouseButtons::Left & e->Button) == ::MouseButtons::Left)
            {
                // Calculate the new control size if the user is
                // dragging the resizing grip.
                if (isResizing)
                {
                    this->Width = e->X + resizeOffset.X;
                    this->Height = e->Y + resizeOffset.Y;
                    CalculateRectangles();
                }

                // Calculate the new location of the control if the
                // user is dragging the window caption.
                else if (isMoving)
                {
                    int XChange = this->Location.X + (e->X - originalClick.X);
                    int YChange = this->Location.Y + (e->Y - originalClick.Y);
                    this->Location = Point(XChange, YChange);
                }

                // Cancel the closing action if the user clicked
                // and held down on the close button, and has dragged
                // the pointer outside the button.
                else if (!elementRectangles["windowClose"].Contains(
                    e->Location) && isClosing)
                {
                    isClosing = false;
                    windowElements["windowClose"] =
                        VisualStyleElement::Window::CloseButton::Normal;
                }
            }

            // The left mouse button is not down.
            else
            {
                // Paint the close button hot if the cursor is on it.
                Rectangle^ closeRectangle =
                    elementRectangles["windowClose"];
                if (closeRectangle->Contains(e->Location))
                {
                    windowElements["windowClose"] =
                        VisualStyleElement::Window::CloseButton::Hot;
                }
                else
                {
                    windowElements["windowClose"] =
                        VisualStyleElement::Window::CloseButton::Normal;
                }


                // Use a resizing cursor if the cursor is on the
                // status grip.
                Rectangle^ gripRectangle = elementRectangles["statusGripper"];
                if (gripRectangle->Contains(e->Location))
                {
                    this->Cursor = Cursors::SizeNWSE;
                }
                else
                {
                    this->Cursor = Cursors::Default;
                }
            }

            Invalidate();
        }

        // Calculate and set the clipping region for the control
        // so that the corners of the title bar are rounded.
    private:
        void SetClipRegion()
        {
            if (!Application::RenderWithVisualStyles)
            {
                return;
            }

            Graphics^ g = this->CreateGraphics();
            // Get the current region for the window caption.
            if (SetRenderer(windowElements["windowCaption"]))
            {
                System::Drawing::Region^ clipRegion =
                    renderer->GetBackgroundRegion(g,
                    elementRectangles["windowCaption"]);

                // Get the client rectangle, but exclude the region
                // of the window caption.
                int height = (int)clipRegion->GetBounds(g).Height;
                System::Drawing::Rectangle nonCaptionRect = Rectangle(
                    ClientRectangle.X, ClientRectangle.Y + height,
                    ClientRectangle.Width, ClientRectangle.Height - height);

                // Add the rectangle to the caption region, and
                // make this region the form's clipping region.
                clipRegion->Union(nonCaptionRect);
                this->Region = clipRegion;
            }

        }

        // Set the VisualStyleRenderer to a new element.
    private:
        bool SetRenderer(VisualStyleElement^ element)
        {
            if (!VisualStyleRenderer::IsElementDefined(element))
            {
                return false;
            }

            if (renderer == nullptr)
            {
                renderer = gcnew VisualStyleRenderer(element);
            }
            else
            {
                renderer->SetParameters(element);
            }

            return true;
        }
    };

    public ref class Form1 : public Form
    {
    public:
        Form1() : Form()
        {
            this->Size = System::Drawing::Size(800, 600);
            this->Location = Point(20, 20);
            this->BackColor = Color::DarkGray;
            WindowSimulation^ ws = gcnew WindowSimulation();
            Controls->Add(ws);
        }

    };
}

[STAThread]
int main()
{
    Application::EnableVisualStyles();
    Application::Run(gcnew VisualStyleRendererSample::Form1());
}
using System;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;

namespace VisualStyleRendererSample
{
    class Form1 : Form
    {
        public Form1()
            : base()
        {
            this.Size = new Size(800, 600);
            this.Location = new Point(20, 20);
            this.BackColor = Color.DarkGray;
            WindowSimulation Window1 = new WindowSimulation();
            Controls.Add(Window1);
        }

        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.Run(new Form1());
        }
    }

    public class WindowSimulation : Control
    {
        private Dictionary<string, VisualStyleElement> windowElements =
            new Dictionary<string, VisualStyleElement>();
        private Dictionary<string, Rectangle> elementRectangles =
            new Dictionary<string, Rectangle>();
        private VisualStyleRenderer renderer = null;

        private Point closeButtonOffset;
        private Size gripperSize;
        private Size closeButtonSize;
        private bool isResizing = false;
        private bool isMoving = false;
        private bool isClosing = false;
        private int captionHeight;
        private int frameThickness;
        private int statusHeight = 22;
        private Point originalClick = new Point();
        private Point resizeOffset = new Point();

        public WindowSimulation()
            : base()
        {
            this.Location = new Point(50, 50);
            this.Size = new Size(350, 300);
            this.BackColor = Color.Azure;
            this.DoubleBuffered = true;
            this.MinimumSize = new Size(300, 200);
            this.Font = SystemFonts.CaptionFont;
            this.Text = "Simulated Window";

            // Insert the VisualStyleElement objects into the Dictionary.
            windowElements.Add("windowCaption",
                VisualStyleElement.Window.Caption.Active);
            windowElements.Add("windowBottom",
                VisualStyleElement.Window.FrameBottom.Active);
            windowElements.Add("windowLeft",
                VisualStyleElement.Window.FrameLeft.Active);
            windowElements.Add("windowRight",
                VisualStyleElement.Window.FrameRight.Active);
            windowElements.Add("windowClose",
                VisualStyleElement.Window.CloseButton.Normal);
            windowElements.Add("statusBar",
                VisualStyleElement.Status.Bar.Normal);
            windowElements.Add("statusGripper",
                VisualStyleElement.Status.Gripper.Normal);

            // Get the sizes and location offsets for the window parts  
            // as specified by the visual style, and then use this 
            // information to calcualate the rectangles for each part.
            GetPartDetails();
            CalculateRectangles();

            this.MouseDown +=
                new MouseEventHandler(ImitationWindow_MouseDown);
            this.MouseUp +=
                new MouseEventHandler(ImitationWindow_MouseUp);
            this.MouseMove +=
                new MouseEventHandler(ImitationWindow_MouseMove);
        }

        // Get the sizes and offsets for the window parts as specified  
        // by the visual style.
        private void GetPartDetails()
        {
            // Do nothing further if visual styles are not enabled.
            if (!Application.RenderWithVisualStyles)
            {
                return;
            }

            using (Graphics g = this.CreateGraphics())
            {
                // Get the size and offset of the close button.
                if (SetRenderer(windowElements["windowClose"]))
                {
                    closeButtonSize =
                        renderer.GetPartSize(g, ThemeSizeType.True);
                    closeButtonOffset =
                        renderer.GetPoint(PointProperty.Offset);
                }

                // Get the height of the window caption.
                if (SetRenderer(windowElements["windowCaption"]))
                {
                    captionHeight = renderer.GetPartSize(g,
                        ThemeSizeType.True).Height;
                }

                // Get the thickness of the left, bottom, 
                // and right window frame.
                if (SetRenderer(windowElements["windowLeft"]))
                {
                    frameThickness = renderer.GetPartSize(g,
                        ThemeSizeType.True).Width;
                }

                // Get the size of the resizing gripper.
                if (SetRenderer(windowElements["statusGripper"]))
                {
                    gripperSize = renderer.GetPartSize(g,
                        ThemeSizeType.True);
                }
            }
        }

        // Use the part metrics to determine the current size 
        // of the rectangles for all of the window parts.
        private void CalculateRectangles()
        {
            int heightMinusFrame =
                ClientRectangle.Height - frameThickness;

            // Calculate the window frame rectangles and add them
            // to the Dictionary of rectangles.
            elementRectangles["windowCaption"] =
                new Rectangle(0, 0,
                ClientRectangle.Width, captionHeight);
            elementRectangles["windowBottom"] =
                new Rectangle(0, heightMinusFrame,
                ClientRectangle.Width, frameThickness);
            elementRectangles["windowLeft"] =
                new Rectangle(0, captionHeight, frameThickness,
                heightMinusFrame - captionHeight);
            elementRectangles["windowRight"] =
                new Rectangle(ClientRectangle.Width - frameThickness,
                captionHeight, frameThickness,
                heightMinusFrame - captionHeight);

            // Calculate the window button rectangle and add it
            // to the Dictionary of rectangles.
            elementRectangles["windowClose"] =
                new Rectangle(ClientRectangle.Right +
                closeButtonOffset.X, closeButtonOffset.Y,
                closeButtonSize.Width, closeButtonSize.Height);

            // Calculate the status bar rectangles and add them
            // to the Dictionary of rectangles.
            elementRectangles["statusBar"] =
                new Rectangle(frameThickness,
                heightMinusFrame - statusHeight,
                ClientRectangle.Width - (2 * frameThickness),
                statusHeight);
            elementRectangles["statusGripper"] =
                new Rectangle(ClientRectangle.Right -
                gripperSize.Width - frameThickness,
                heightMinusFrame - gripperSize.Height,
                gripperSize.Width, gripperSize.Height);
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);

            // Ensure that visual styles are supported.
            if (!Application.RenderWithVisualStyles)
            {
                this.Text = "Visual styles are not enabled.";
                TextRenderer.DrawText(e.Graphics, this.Text,
                    this.Font, this.Location, this.ForeColor);
                return;
            }

            // Set the clip region to define the curved corners 
            // of the caption.
            SetClipRegion();

            // Draw each part of the window.
            foreach (KeyValuePair<string, VisualStyleElement> entry
                in windowElements)
            {
                if (SetRenderer(entry.Value))
                {
                    renderer.DrawBackground(e.Graphics,
                        elementRectangles[entry.Key]);
                }
            }

            // Draw the caption text.
            TextRenderer.DrawText(e.Graphics, this.Text, this.Font,
                elementRectangles["windowCaption"], Color.White,
                TextFormatFlags.VerticalCenter |
                TextFormatFlags.HorizontalCenter);
        }

        // Initiate dragging, resizing, or closing the imitation window.
        void ImitationWindow_MouseDown(object sender, MouseEventArgs e)
        {
            // The user clicked the close button.
            if (elementRectangles["windowClose"].Contains(e.Location))
            {
                windowElements["windowClose"] =
                    VisualStyleElement.Window.CloseButton.Pressed;
                isClosing = true;
            }

            // The user clicked the status grip.
            else if (elementRectangles["statusGripper"].
                Contains(e.Location))
            {
                isResizing = true;
                this.Cursor = Cursors.SizeNWSE;
                resizeOffset.X = this.Right - this.Left - e.X;
                resizeOffset.Y = this.Bottom - this.Top - e.Y;
            }

            // The user clicked the window caption.
            else if (elementRectangles["windowCaption"].
                Contains(e.Location))
            {
                isMoving = true;
                originalClick.X = e.X;
                originalClick.Y = e.Y;
            }

            Invalidate();
        }

        // Stop any current resizing or moving actions.
        void ImitationWindow_MouseUp(object sender, MouseEventArgs e)
        {
            // Stop moving the location of the window rectangles.
            if (isMoving)
            {
                isMoving = false;
            }

            // Change the cursor back to the default if the user 
            // stops resizing.
            else if (isResizing)
            {
                isResizing = false;
            }

            // Close the application if the user clicks the 
            // close button.
            else if (elementRectangles["windowClose"].
                Contains(e.Location) && isClosing)
            {
                Application.Exit();
            }
        }

        // Handle resizing or moving actions.
        void ImitationWindow_MouseMove(object sender,
            MouseEventArgs e)
        {
            // The left mouse button is down.
            if ((MouseButtons.Left & e.Button) == MouseButtons.Left)
            {
                // Calculate the new control size if the user is 
                // dragging the resizing grip.
                if (isResizing)
                {
                    this.Width = e.X + resizeOffset.X;
                    this.Height = e.Y + resizeOffset.Y;
                    CalculateRectangles();
                }

                // Calculate the new location of the control if the  
                // user is dragging the window caption.
                else if (isMoving)
                {
                    int XChange = this.Location.X +
                        (e.X - originalClick.X);
                    int YChange = this.Location.Y +
                        (e.Y - originalClick.Y);
                    this.Location = new Point(XChange, YChange);
                }

                // Cancel the closing action if the user clicked  
                // and held down on the close button, and has dragged   
                // the pointer outside the button.
                else if (!elementRectangles["windowClose"].
                    Contains(e.Location) && isClosing)
                {
                    isClosing = false;
                    windowElements["windowClose"] =
                        VisualStyleElement.Window.CloseButton.Normal;
                }
            }

            // The left mouse button is not down.
            else
            {
                // Paint the close button hot if the cursor is on it.
                Rectangle closeRectangle =
                    elementRectangles["windowClose"];
                windowElements["windowClose"] =
                    closeRectangle.Contains(e.Location) ?
                    VisualStyleElement.Window.CloseButton.Hot :
                    VisualStyleElement.Window.CloseButton.Normal;

                // Use a resizing cursor if the cursor is on the 
                // status grip.
                Rectangle gripRectangle =
                    elementRectangles["statusGripper"];
                this.Cursor = gripRectangle.Contains(e.Location) ?
                    Cursors.SizeNWSE : Cursors.Default;
            }

            Invalidate();
        }

        // Calculate and set the clipping region for the control  
        // so that the corners of the title bar are rounded.
        private void SetClipRegion()
        {
            if (!Application.RenderWithVisualStyles)
            {
                return;
            }

            using (Graphics g = this.CreateGraphics())
            {
                // Get the current region for the window caption.
                if (SetRenderer(windowElements["windowCaption"]))
                {
                    Region clipRegion = renderer.GetBackgroundRegion(
                        g, elementRectangles["windowCaption"]);

                    // Get the client rectangle, but exclude the region 
                    // of the window caption.
                    int height = (int)clipRegion.GetBounds(g).Height;
                    Rectangle nonCaptionRect = new Rectangle(
                        ClientRectangle.X,
                        ClientRectangle.Y + height,
                        ClientRectangle.Width,
                        ClientRectangle.Height - height);

                    // Add the rectangle to the caption region, and  
                    // make this region the form's clipping region.
                    clipRegion.Union(nonCaptionRect);
                    this.Region = clipRegion;
                }
            }
        }

        // Set the VisualStyleRenderer to a new element.
        private bool SetRenderer(VisualStyleElement element)
        {
            if (!VisualStyleRenderer.IsElementDefined(element))
            {
                return false;
            }

            if (renderer == null)
            {
                renderer = new VisualStyleRenderer(element);
            }
            else
            {
                renderer.SetParameters(element);
            }

            return true;
        }
    }
}
Imports System
Imports System.Text
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Collections.Generic
Imports System.Windows.Forms
Imports System.Windows.Forms.VisualStyles

Namespace VisualStyleRendererSample

    Class Form1
        Inherits Form

        Public Sub New()
            With Me
                .Size = New Size(800, 600)
                .Location = New Point(20, 20)
                .BackColor = Color.DarkGray
            End With
            Dim Window1 As New ImitationWindow()
            Controls.Add(Window1)
        End Sub

        <STAThread()> _
        Shared Sub Main()
            Application.EnableVisualStyles()
            Application.Run(New Form1())
        End Sub
    End Class

    Public Class ImitationWindow
        Inherits Control

        Private windowElements As _
            New Dictionary(Of String, VisualStyleElement)
        Private elementRectangles As _
            New Dictionary(Of String, Rectangle)
        Private renderer As VisualStyleRenderer = Nothing
        Private closeButtonOffset As Point
        Private gripperSize As Size
        Private closeButtonSize As Size
        Private isResizing As Boolean = False
        Private isMoving As Boolean = False
        Private isClosing As Boolean = False
        Private captionHeight As Integer
        Private frameThickness As Integer
        Private statusHeight As Integer = 22
        Private originalClick As New Point()
        Private resizeOffset As New Point()

        Public Sub New()
            With Me
                .Location = New Point(50, 50)
                .Size = New Size(350, 300)
                .BackColor = Color.Azure
                .DoubleBuffered = True
                .MinimumSize = New Size(300, 200)
                .Font = SystemFonts.CaptionFont
                .Text = "Imitation Window"
            End With

            ' Create a collection of VisualStyleElement objects.
            With windowElements
                .Add("windowCaption", _
                    VisualStyleElement.Window.Caption.Active)
                .Add("windowBottom", _
                    VisualStyleElement.Window.FrameBottom.Active)
                .Add("windowLeft", _
                    VisualStyleElement.Window.FrameLeft.Active)
                .Add("windowRight", _
                    VisualStyleElement.Window.FrameRight.Active)
                .Add("windowClose", _
                    VisualStyleElement.Window.CloseButton.Normal)
                .Add("statusBar", _
                    VisualStyleElement.Status.Bar.Normal)
                .Add("statusGripper", _
                    VisualStyleElement.Status.Gripper.Normal)
            End With

            ' Get the sizes and location offsets for the window parts  
            ' as specified by the visual style, and then use this   
            ' information to calcualate the rectangles for each part.
            GetPartDetails()
            CalculateRectangles()
        End Sub

        ' Get the sizes and offsets for the window parts as specified 
        ' by the visual style.
        Private Sub GetPartDetails()
            ' Do nothing further if visual styles are not enabled.
            If Not Application.RenderWithVisualStyles Then
                Return
            End If

            Using g As Graphics = Me.CreateGraphics()
                ' Get the size and offset of the close button.
                If SetRenderer(windowElements("windowClose")) Then
                    closeButtonSize = _
                        renderer.GetPartSize(g, ThemeSizeType.True)
                    closeButtonOffset = _
                        renderer.GetPoint(PointProperty.Offset)
                End If

                ' Get the height of the window caption.
                If SetRenderer(windowElements("windowCaption")) Then
                    captionHeight = renderer.GetPartSize(g, _
                        ThemeSizeType.True).Height
                End If

                ' Get the thickness of the left, bottom, and right 
                ' window frame.
                If SetRenderer(windowElements("windowLeft")) Then
                    frameThickness = renderer.GetPartSize(g, _
                        ThemeSizeType.True).Width
                End If

                ' Get the size of the resizing gripper.
                If SetRenderer(windowElements("statusGripper")) Then
                    gripperSize = renderer.GetPartSize(g, _
                        ThemeSizeType.True)
                End If
            End Using
        End Sub

        ' Use the part metrics to determine the current size of the 
        ' rectangles for all of the window parts.
        Private Sub CalculateRectangles()

            Dim heightMinusFrame As Integer = _
                ClientRectangle.Height - frameThickness

            ' Calculate the window frame rectangles and add them
            ' to the Dictionary of rectangles.
            elementRectangles("windowCaption") = _
                New Rectangle(0, 0, ClientRectangle.Width, _
                captionHeight)
            elementRectangles("windowBottom") = _
                New Rectangle(0, heightMinusFrame, _
                ClientRectangle.Width, frameThickness)
            elementRectangles("windowLeft") = _
                New Rectangle(0, captionHeight, frameThickness, _
                heightMinusFrame - captionHeight)
            elementRectangles("windowRight") = _
                New Rectangle(ClientRectangle.Width - frameThickness, _
                captionHeight, frameThickness, _
                heightMinusFrame - captionHeight)

            ' Calculate the window button rectangle and add it
            ' to the Dictionary of rectangles.
            elementRectangles("windowClose") = _
                New Rectangle(ClientRectangle.Right + _
                closeButtonOffset.X, closeButtonOffset.Y, _
                closeButtonSize.Width, closeButtonSize.Height)

            ' Calculate the status bar rectangles and add them
            ' to the Dictionary of rectangles.
            elementRectangles("statusBar") = _
                New Rectangle(frameThickness, _
                heightMinusFrame - statusHeight, _
                ClientRectangle.Width - 2 * frameThickness, _
                statusHeight)
            elementRectangles("statusGripper") = _
                New Rectangle(ClientRectangle.Right - _
                gripperSize.Width - frameThickness, _
                heightMinusFrame - gripperSize.Height, _
                gripperSize.Width, gripperSize.Height)
        End Sub

        Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
            MyBase.OnPaint(e)

            ' Ensure that visual styles are supported.
            If Not Application.RenderWithVisualStyles Then
                Me.Text = "Visual styles are not enabled."
                TextRenderer.DrawText(e.Graphics, Me.Text, Me.Font, _
                    Me.Location, Me.ForeColor)
                Return
            End If

            ' Set the clip region to define the curved corners of 
            ' the caption.
            SetClipRegion()

            ' Draw each part of the window.
            Dim entry As KeyValuePair(Of String, VisualStyleElement)
            For Each entry In windowElements
                If SetRenderer(entry.Value) Then
                    renderer.DrawBackground(e.Graphics, _
                        elementRectangles(entry.Key))
                End If
            Next entry

            ' Draw the caption text.
            TextRenderer.DrawText(e.Graphics, Me.Text, Me.Font, _
                elementRectangles("windowCaption"), Color.White, _
                TextFormatFlags.VerticalCenter Or _
                TextFormatFlags.HorizontalCenter)
        End Sub

        ' Initiate dragging, resizing, or closing the imitation window.
        Private Sub ImitationWindow_MouseDown(ByVal sender As Object, _
            ByVal e As MouseEventArgs) Handles Me.MouseDown

            ' The user clicked the close button.
            If elementRectangles("windowClose"). _
                Contains(e.Location) Then

                windowElements("windowClose") = _
                    VisualStyleElement.Window.CloseButton.Pressed
                isClosing = True

            ' The user clicked the status grip.
            ElseIf elementRectangles("statusGripper"). _
                Contains(e.Location) Then

                isResizing = True
                Me.Cursor = Cursors.SizeNWSE
                resizeOffset.X = Me.Right - Me.Left - e.X
                resizeOffset.Y = Me.Bottom - Me.Top - e.Y

            ' The user clicked the window caption.
            ElseIf elementRectangles("windowCaption"). _
                Contains(e.Location) Then

                isMoving = True
                originalClick.X = e.X
                originalClick.Y = e.Y
            End If
            Invalidate()
        End Sub

        ' Stop any current resizing or moving actions.
        Private Sub ImitationWindow_MouseUp(ByVal sender As Object, _
            ByVal e As MouseEventArgs) Handles Me.MouseUp

            ' Stop moving the location of the window rectangles.
            If isMoving Then
                isMoving = False

            ' Change the cursor back to the default if the 
            ' user stops resizing.
            ElseIf isResizing Then
                isResizing = False

            ' Close the application if the user clicks the 
            ' close button.
            ElseIf elementRectangles("windowClose"). _
                Contains(e.Location) And isClosing Then
                Application.Exit()
            End If
        End Sub

        ' Handle resizing or moving actions.
        Private Sub ImitationWindow_MouseMove(ByVal sender As Object, _
            ByVal e As MouseEventArgs) Handles Me.MouseMove

            ' The left mouse button is down.
            If (MouseButtons.Left And e.Button) = _
                MouseButtons.Left Then

                ' Calculate the new control size if the user is  
                ' dragging the resizing grip.
                If isResizing Then
                    Me.Width = e.X + resizeOffset.X
                    Me.Height = e.Y + resizeOffset.Y
                    CalculateRectangles()

                ' Calculate the new location of the control if   
                ' the user is dragging the window caption.
                ElseIf isMoving Then
                    Dim XChange As Integer = Me.Location.X + _
                        (e.X - originalClick.X)
                    Dim YChange As Integer = Me.Location.Y + _
                        (e.Y - originalClick.Y)
                    Me.Location = New Point(XChange, YChange)

                ' Cancel the closing action if the user clicked and  
                ' held down on the close button, and has dragged the   
                ' pointer outside the button.
                ElseIf Not elementRectangles("windowClose"). _
                    Contains(e.Location) And isClosing Then

                    isClosing = False
                    windowElements("windowClose") = _
                        VisualStyleElement.Window.CloseButton.Normal
                End If

            ' The left mouse button is not down.
            Else
                ' Paint the close button hot if the cursor is on it.
                If elementRectangles("windowClose"). _
                    Contains(e.Location) Then
                    windowElements("windowClose") = _
                        VisualStyleElement.Window.CloseButton.Hot
                Else
                    windowElements("windowClose") = _
                        VisualStyleElement.Window.CloseButton.Normal
                End If

                ' Use a resizing cursor if the cursor is on the 
                ' status grip.
                If elementRectangles("statusGripper"). _
                    Contains(e.Location) Then
                    Me.Cursor = Cursors.SizeNWSE
                Else
                    Me.Cursor = Cursors.Default
                End If
            End If
            Invalidate()
        End Sub

        ' Calculate and set the clipping region for the control  
        ' so that the corners of the title bar are rounded.
        Private Sub SetClipRegion()
            If Not Application.RenderWithVisualStyles Then
                Return
            End If

            Using g As Graphics = Me.CreateGraphics()
                ' Get the current region for the window caption.
                If SetRenderer(windowElements("windowCaption")) Then
                    Dim clipRegion As Region = _
                        renderer.GetBackgroundRegion(g, _
                        elementRectangles("windowCaption"))

                    ' Get the client rectangle, but exclude the   
                    ' region of the window caption.
                    Dim height As Integer = _
                        CInt(clipRegion.GetBounds(g).Height)
                    Dim nonCaptionRect As _
                        New Rectangle(ClientRectangle.X, _
                        ClientRectangle.Y + height, _
                        ClientRectangle.Width, _
                        ClientRectangle.Height - height)

                    ' Add the rectangle to the caption region, and  
                    ' make this region the form's clipping region.
                    clipRegion.Union(nonCaptionRect)
                    Me.Region = clipRegion
                End If
            End Using
        End Sub

        ' Set the VisualStyleRenderer to a new element.
        Private Function SetRenderer(ByVal element As _
            VisualStyleElement) As Boolean

            If Not VisualStyleRenderer.IsElementDefined(element) Then
                Return False
            End If

            If renderer Is Nothing Then
                renderer = New VisualStyleRenderer(element)
            Else
                renderer.SetParameters(element)
            End If

            Return True
        End Function

    End Class
End Namespace

注解

System.Windows.Forms.VisualStyles命名空间公开了VisualStyleElement对象表示的所有控件和用户界面 (UI) 元素支持的视觉样式。The System.Windows.Forms.VisualStyles namespace exposes VisualStyleElement objects that represent all of the controls and user interface (UI) elements that are supported by visual styles. 若要绘制或获取有关特定元素的信息,必须设置VisualStyleRenderer感兴趣的元素。To draw or get information about a particular element, you must set a VisualStyleRenderer to the element you are interested in. 一个VisualStyleRenderer是自动设置为指定VisualStyleElementVisualStyleRenderer构造函数,但您还可以设置的现有VisualStyleRenderer给不同的元素通过调用SetParameters方法。A VisualStyleRenderer is automatically set to a specified VisualStyleElement in the VisualStyleRenderer constructor, but you can also set an existing VisualStyleRenderer to a different element by calling the SetParameters method.

若要绘制一个元素,请使用DrawBackground方法。To draw an element, use the DrawBackground method. VisualStyleRenderer类还包括方法,如GetColorGetEnumValue,它们提供了有关如何将元素定义由当前视觉样式的信息。The VisualStyleRenderer class also includes methods, such as GetColor and GetEnumValue, that provide information about how an element is defined by the current visual style.

VisualStyleRenderer构造函数和许多VisualStyleRenderer方法会引发异常,除非在操作系统中启用了可视样式和视觉样式应用于 windows 的应用程序的工作区。The VisualStyleRenderer constructor and many of the VisualStyleRenderer methods throw exceptions unless visual styles are enabled in the operating system and visual styles are applied to the client area of application windows. 若要检查这些条件,请使用staticIsSupported属性。To check for these conditions, use the staticIsSupported property.

VisualStyleRenderer类包装了视觉样式 (UxTheme) API 从 Windows Platform SDK 的 Windows Shell 部分的功能。The VisualStyleRenderer class wraps the functionality of the visual styles (UxTheme) API from the Windows Shell portion of the Windows Platform SDK.

构造函数

VisualStyleRenderer(String, Int32, Int32) VisualStyleRenderer(String, Int32, Int32) VisualStyleRenderer(String, Int32, Int32) VisualStyleRenderer(String, Int32, Int32)

使用给定的类、部件和状态值初始化 VisualStyleRenderer 类的新实例。Initializes a new instance of the VisualStyleRenderer class using the given class, part, and state values.

VisualStyleRenderer(VisualStyleElement) VisualStyleRenderer(VisualStyleElement) VisualStyleRenderer(VisualStyleElement) VisualStyleRenderer(VisualStyleElement)

使用给定的 VisualStyleRenderer 初始化 VisualStyleElement 类的新实例。Initializes a new instance of the VisualStyleRenderer class using the given VisualStyleElement.

属性

Class Class Class Class

获取当前视觉样式元素的类名。Gets the class name of the current visual style element.

Handle Handle Handle Handle

获取视觉样式元素的当前类的唯一标识符。Gets a unique identifier for the current class of visual style elements.

IsSupported IsSupported IsSupported IsSupported

获取一个值,该值指定操作系统是否正在使用视觉样式绘制控件。Gets a value specifying whether the operating system is using visual styles to draw controls.

LastHResult LastHResult LastHResult LastHResult

获取本机视觉样式 (UxTheme) API 方法所返回的上一个错误代码,这些方法由 VisualStyleRenderer 类封装。Gets the last error code returned by the native visual styles (UxTheme) API methods encapsulated by the VisualStyleRenderer class.

Part Part Part Part

获取当前视觉样式元素的部件。Gets the part of the current visual style element.

State State State State

获取当前视觉样式元素的状态。Gets the state of the current visual style element.

方法

DrawBackground(IDeviceContext, Rectangle) DrawBackground(IDeviceContext, Rectangle) DrawBackground(IDeviceContext, Rectangle) DrawBackground(IDeviceContext, Rectangle)

在指定边框内绘制当前视觉样式元素的背景图像。Draws the background image of the current visual style element within the specified bounding rectangle.

DrawBackground(IDeviceContext, Rectangle, Rectangle) DrawBackground(IDeviceContext, Rectangle, Rectangle) DrawBackground(IDeviceContext, Rectangle, Rectangle) DrawBackground(IDeviceContext, Rectangle, Rectangle)

在指定边框内绘制当前视觉样式元素的背景图像,然后剪辑到指定的剪辑矩形。Draws the background image of the current visual style element within the specified bounding rectangle and clipped to the specified clipping rectangle.

DrawEdge(IDeviceContext, Rectangle, Edges, EdgeStyle, EdgeEffects) DrawEdge(IDeviceContext, Rectangle, Edges, EdgeStyle, EdgeEffects) DrawEdge(IDeviceContext, Rectangle, Edges, EdgeStyle, EdgeEffects) DrawEdge(IDeviceContext, Rectangle, Edges, EdgeStyle, EdgeEffects)

绘制指定边框的一个或多个边缘。Draws one or more edges of the specified bounding rectangle.

DrawImage(Graphics, Rectangle, Image) DrawImage(Graphics, Rectangle, Image) DrawImage(Graphics, Rectangle, Image) DrawImage(Graphics, Rectangle, Image)

在指定的边界内绘制指定的图像。Draws the specified image within the specified bounds.

DrawImage(Graphics, Rectangle, ImageList, Int32) DrawImage(Graphics, Rectangle, ImageList, Int32) DrawImage(Graphics, Rectangle, ImageList, Int32) DrawImage(Graphics, Rectangle, ImageList, Int32)

在指定的边界内绘制指定的 ImageList 中的图像。Draws the image from the specified ImageList within the specified bounds.

DrawParentBackground(IDeviceContext, Rectangle, Control) DrawParentBackground(IDeviceContext, Rectangle, Control) DrawParentBackground(IDeviceContext, Rectangle, Control) DrawParentBackground(IDeviceContext, Rectangle, Control)

在指定区域中绘制控件的父级的背景。Draws the background of a control's parent in the specified area.

DrawText(IDeviceContext, Rectangle, String) DrawText(IDeviceContext, Rectangle, String) DrawText(IDeviceContext, Rectangle, String) DrawText(IDeviceContext, Rectangle, String)

使用默认格式在指定边界内绘制文本。Draws text in the specified bounds using default formatting.

DrawText(IDeviceContext, Rectangle, String, Boolean) DrawText(IDeviceContext, Rectangle, String, Boolean) DrawText(IDeviceContext, Rectangle, String, Boolean) DrawText(IDeviceContext, Rectangle, String, Boolean)

在指定边界内绘制文本并且可以选择显示禁用的文本。Draws text in the specified bounds with the option of displaying disabled text.

DrawText(IDeviceContext, Rectangle, String, Boolean, TextFormatFlags) DrawText(IDeviceContext, Rectangle, String, Boolean, TextFormatFlags) DrawText(IDeviceContext, Rectangle, String, Boolean, TextFormatFlags) DrawText(IDeviceContext, Rectangle, String, Boolean, TextFormatFlags)

在指定边框内绘制文本,并且可以选择显示禁用的文本以及应用其他文本格式。Draws text in the specified bounding rectangle with the option of displaying disabled text and applying other text formatting.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

确定指定的对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetBackgroundContentRectangle(IDeviceContext, Rectangle) GetBackgroundContentRectangle(IDeviceContext, Rectangle) GetBackgroundContentRectangle(IDeviceContext, Rectangle) GetBackgroundContentRectangle(IDeviceContext, Rectangle)

返回当前视觉样式元素的背景的内容区域。Returns the content area for the background of the current visual style element.

GetBackgroundExtent(IDeviceContext, Rectangle) GetBackgroundExtent(IDeviceContext, Rectangle) GetBackgroundExtent(IDeviceContext, Rectangle) GetBackgroundExtent(IDeviceContext, Rectangle)

返回当前视觉样式元素的整个背景区域。Returns the entire background area for the current visual style element.

GetBackgroundRegion(IDeviceContext, Rectangle) GetBackgroundRegion(IDeviceContext, Rectangle) GetBackgroundRegion(IDeviceContext, Rectangle) GetBackgroundRegion(IDeviceContext, Rectangle)

返回当前视觉样式元素背景的区域。Returns the region for the background of the current visual style element.

GetBoolean(BooleanProperty) GetBoolean(BooleanProperty) GetBoolean(BooleanProperty) GetBoolean(BooleanProperty)

返回当前视觉样式元素的指定布尔属性的值。Returns the value of the specified Boolean property for the current visual style element.

GetColor(ColorProperty) GetColor(ColorProperty) GetColor(ColorProperty) GetColor(ColorProperty)

返回当前视觉样式元素的指定颜色属性的值。Returns the value of the specified color property for the current visual style element.

GetEnumValue(EnumProperty) GetEnumValue(EnumProperty) GetEnumValue(EnumProperty) GetEnumValue(EnumProperty)

返回当前视觉样式元素的指定枚举类型属性的值。Returns the value of the specified enumerated type property for the current visual style element.

GetFilename(FilenameProperty) GetFilename(FilenameProperty) GetFilename(FilenameProperty) GetFilename(FilenameProperty)

返回当前视觉样式元素的指定文件名属性的值。Returns the value of the specified file name property for the current visual style element.

GetFont(IDeviceContext, FontProperty) GetFont(IDeviceContext, FontProperty) GetFont(IDeviceContext, FontProperty) GetFont(IDeviceContext, FontProperty)

返回当前视觉样式元素的指定字体属性的值。Returns the value of the specified font property for the current visual style element.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(Inherited from Object)
GetInteger(IntegerProperty) GetInteger(IntegerProperty) GetInteger(IntegerProperty) GetInteger(IntegerProperty)

返回当前视觉样式元素的指定整数属性的值。Returns the value of the specified integer property for the current visual style element.

GetMargins(IDeviceContext, MarginProperty) GetMargins(IDeviceContext, MarginProperty) GetMargins(IDeviceContext, MarginProperty) GetMargins(IDeviceContext, MarginProperty)

返回当前视觉样式元素的指定边距属性的值。Returns the value of the specified margins property for the current visual style element.

GetPartSize(IDeviceContext, Rectangle, ThemeSizeType) GetPartSize(IDeviceContext, Rectangle, ThemeSizeType) GetPartSize(IDeviceContext, Rectangle, ThemeSizeType) GetPartSize(IDeviceContext, Rectangle, ThemeSizeType)

使用指定的绘制边界返回当前视觉样式部件的指定大小属性的值。Returns the value of the specified size property of the current visual style part using the specified drawing bounds.

GetPartSize(IDeviceContext, ThemeSizeType) GetPartSize(IDeviceContext, ThemeSizeType) GetPartSize(IDeviceContext, ThemeSizeType) GetPartSize(IDeviceContext, ThemeSizeType)

返回当前视觉样式部件的指定大小属性的值。Returns the value of the specified size property of the current visual style part.

GetPoint(PointProperty) GetPoint(PointProperty) GetPoint(PointProperty) GetPoint(PointProperty)

返回当前视觉样式元素的指定点属性的值。Returns the value of the specified point property for the current visual style element.

GetString(StringProperty) GetString(StringProperty) GetString(StringProperty) GetString(StringProperty)

返回当前视觉样式元素的指定字符串属性的值。Returns the value of the specified string property for the current visual style element.

GetTextExtent(IDeviceContext, Rectangle, String, TextFormatFlags) GetTextExtent(IDeviceContext, Rectangle, String, TextFormatFlags) GetTextExtent(IDeviceContext, Rectangle, String, TextFormatFlags) GetTextExtent(IDeviceContext, Rectangle, String, TextFormatFlags)

返回指定的字符串当用当前视觉样式元素的字体在指定的初始边框内绘制时的大小和位置。Returns the size and location of the specified string when drawn with the font of the current visual style element within the specified initial bounding rectangle.

GetTextExtent(IDeviceContext, String, TextFormatFlags) GetTextExtent(IDeviceContext, String, TextFormatFlags) GetTextExtent(IDeviceContext, String, TextFormatFlags) GetTextExtent(IDeviceContext, String, TextFormatFlags)

返回指定的字符串在用当前视觉样式元素的字体绘制时的大小和位置。Returns the size and location of the specified string when drawn with the font of the current visual style element.

GetTextMetrics(IDeviceContext) GetTextMetrics(IDeviceContext) GetTextMetrics(IDeviceContext) GetTextMetrics(IDeviceContext)

检索有关由当前视觉样式元素指定的字体的信息。Retrieves information about the font specified by the current visual style element.

GetType() GetType() GetType() GetType()

获取当前实例的 TypeGets the Type of the current instance.

(Inherited from Object)
HitTestBackground(Graphics, Rectangle, Region, Point, HitTestOptions) HitTestBackground(Graphics, Rectangle, Region, Point, HitTestOptions) HitTestBackground(Graphics, Rectangle, Region, Point, HitTestOptions) HitTestBackground(Graphics, Rectangle, Region, Point, HitTestOptions)

返回一个命中测试代码,指示该点是否包含在当前视觉样式元素的背景中的指定边界内。Returns a hit test code indicating whether the point is contained in the background of the current visual style element and within the specified bounds.

HitTestBackground(IDeviceContext, Rectangle, IntPtr, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, IntPtr, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, IntPtr, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, IntPtr, Point, HitTestOptions)

返回一个命中测试代码,指示该点是否包含在当前视觉样式元素的背景中的指定区域内。Returns a hit test code indicating whether the point is contained in the background of the current visual style element and within the specified region.

HitTestBackground(IDeviceContext, Rectangle, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, Point, HitTestOptions) HitTestBackground(IDeviceContext, Rectangle, Point, HitTestOptions)

返回一个命中测试代码,指示某个点是否包含在当前视觉样式元素的背景中。Returns a hit test code indicating whether a point is contained in the background of the current visual style element.

IsBackgroundPartiallyTransparent() IsBackgroundPartiallyTransparent() IsBackgroundPartiallyTransparent() IsBackgroundPartiallyTransparent()

指示当前视觉样式元素的背景是否有半透明或 Alpha 混合部分。Indicates whether the background of the current visual style element has any semitransparent or alpha-blended pieces.

IsElementDefined(VisualStyleElement) IsElementDefined(VisualStyleElement) IsElementDefined(VisualStyleElement) IsElementDefined(VisualStyleElement)

确定当前视觉样式是否定义了指定的视觉样式元素。Determines whether the specified visual style element is defined by the current visual style.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(Inherited from Object)
SetParameters(String, Int32, Int32) SetParameters(String, Int32, Int32) SetParameters(String, Int32, Int32) SetParameters(String, Int32, Int32)

将此 VisualStyleRenderer 设置给由指定的类、部件和状态值所表示的视觉样式元素。Sets this VisualStyleRenderer to the visual style element represented by the specified class, part, and state values.

SetParameters(VisualStyleElement) SetParameters(VisualStyleElement) SetParameters(VisualStyleElement) SetParameters(VisualStyleElement)

将此 VisualStyleRenderer 设置给由指定 VisualStyleElement 所表示的视觉样式元素。Sets this VisualStyleRenderer to the visual style element represented by the specified VisualStyleElement.

ToString() ToString() ToString() ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(Inherited from Object)

适用于

另请参阅