ButtonRenderer クラス
定義
重要
一部の情報は、リリース前に大きく変更される可能性があるプレリリースされた製品に関するものです。 Microsoft は、ここに記載されている情報について、明示または黙示を問わず、一切保証しません。
visual スタイルを使用して、または使用せずに、ボタン コントロールを描画するために使用されるメソッドを提供します。 このクラスは継承できません。
public ref class ButtonRenderer sealedpublic ref class ButtonRenderer abstract sealedpublic sealed class ButtonRendererpublic static class ButtonRenderertype ButtonRenderer = classPublic NotInheritable Class ButtonRendererPublic Class ButtonRenderer- 継承
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ButtonRenderer
例
次のコード例は、メソッドを使用してボタンを描画するカスタム コントロールを DrawButton 作成する方法を示しています。 ボタンをクリックすると、コントロールは元のボタンの境界内に小さいボタンを描画し、コントロールはメソッドを DrawParentBackground 使用して元のボタンの残りの部分に描画します。
#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Drawing;
using namespace System::Windows::Forms;
using namespace System::Windows::Forms::VisualStyles;
namespace ButtonRendererSample
{
public ref class CustomButton : public Control
{
private:
Rectangle clickRectangleValue;
private:
PushButtonState state;
public:
CustomButton()
{
__super::Control();
this->Size = System::Drawing::Size(100, 40);
this->Location = Point(50, 50);
this->Font = SystemFonts::IconTitleFont;
this->Text = "Click here";
clickRectangleValue = Rectangle();
state = PushButtonState::Normal;
}
// Define the bounds of the smaller pressed button.
public:
property Rectangle ClickRectangle
{
Rectangle get()
{
clickRectangleValue.X = ClientRectangle.X +
(int)(.2 * ClientRectangle.Width);
clickRectangleValue.Y = ClientRectangle.Y +
(int)(.2 * ClientRectangle.Height);
clickRectangleValue.Width = ClientRectangle.Width -
(int)(.4 * ClientRectangle.Width);
clickRectangleValue.Height = ClientRectangle.Height -
(int)(.4 * ClientRectangle.Height);
return clickRectangleValue;
}
}
// Draw the large or small button, depending on the current state.
protected:
virtual void OnPaint(PaintEventArgs^ e) override
{
__super::OnPaint(e);
// Draw the smaller pressed button image
if (state == PushButtonState::Pressed)
{
// Set the background color to the parent if visual styles
// are disabled, because DrawParentBackground will only paint
// over the control background if visual styles are enabled.
if (Application::RenderWithVisualStyles)
{
this->BackColor = Color::Azure;
}
else
{
this->BackColor = this->Parent->BackColor;
}
// If you comment out the call to DrawParentBackground,
// the background of the control will still be visible
// outside the pressed button, if visual styles are enabled.
ButtonRenderer::DrawParentBackground(e->Graphics,
ClientRectangle, this);
ButtonRenderer::DrawButton(e->Graphics, ClickRectangle,
this->Text, this->Font, true, state);
}
// Draw the bigger unpressed button image.
else
{
ButtonRenderer::DrawButton(e->Graphics, ClientRectangle,
this->Text, this->Font, false, state);
}
}
// Draw the smaller pressed button image.
protected:
virtual void OnMouseDown(MouseEventArgs^ e) override
{
__super::OnMouseDown(e);
this->Text = "Clicked!";
state = PushButtonState::Pressed;
Invalidate();
}
// Draw the button in the hot state.
protected:
virtual void OnMouseEnter(EventArgs^ e) override
{
__super::OnMouseEnter(e);
this->Text = "Click here";
state = PushButtonState::Hot;
Invalidate();
}
// Draw the button in the unpressed state.
protected:
virtual void OnMouseLeave(EventArgs^ e) override
{
__super::OnMouseLeave(e);
this->Text = "Click here";
state = PushButtonState::Normal;
Invalidate();
}
// Draw the button hot if the mouse is released on the button.
protected:
virtual void OnMouseUp(MouseEventArgs^ e) override
{
__super::OnMouseUp(e);
OnMouseEnter(e);
}
// Detect when the cursor leaves the button area while
// it is pressed.
protected:
virtual void OnMouseMove(MouseEventArgs^ e) override
{
__super::OnMouseMove(e);
// Detect when the left mouse button is down and
// the cursor has left the pressed button area.
if ((e->Button & ::MouseButtons::Left) == ::MouseButtons::Left &&
!ClientRectangle.Contains(e->Location) &&
state == PushButtonState::Pressed)
{
OnMouseLeave(e);
}
}
};
ref class Form1 : public Form
{
public:
Form1()
{
__super::Form();
CustomButton^ Button1 = gcnew CustomButton();
Controls->Add(Button1);
if (Application::RenderWithVisualStyles)
{
this->Text = "Visual Styles Enabled";
}
else
{
this->Text = "Visual Styles Disabled";
}
}
};
}
using namespace ButtonRendererSample;
[STAThread]
int main()
{
// If you do not call EnableVisualStyles below, then
// ButtonRenderer automatically detects this and draws
// the button without visual styles.
Application::EnableVisualStyles();
Application::Run(gcnew Form1());
}
using System;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
namespace ButtonRendererSample
{
class Form1 : Form
{
public Form1()
: base()
{
CustomButton Button1 = new CustomButton();
Controls.Add(Button1);
if (Application.RenderWithVisualStyles)
this.Text = "Visual Styles Enabled";
else
this.Text = "Visual Styles Disabled";
}
[STAThread]
static void Main()
{
// If you do not call EnableVisualStyles below, then
// ButtonRenderer automatically detects this and draws
// the button without visual styles.
Application.EnableVisualStyles();
Application.Run(new Form1());
}
}
public class CustomButton : Control
{
private Rectangle clickRectangleValue = new Rectangle();
private PushButtonState state = PushButtonState.Normal;
public CustomButton()
: base()
{
this.Size = new Size(100, 40);
this.Location = new Point(50, 50);
this.Font = SystemFonts.IconTitleFont;
this.Text = "Click here";
}
// Define the bounds of the smaller pressed button.
public Rectangle ClickRectangle
{
get
{
clickRectangleValue.X = ClientRectangle.X +
(int)(.2 * ClientRectangle.Width);
clickRectangleValue.Y = ClientRectangle.Y +
(int)(.2 * ClientRectangle.Height);
clickRectangleValue.Width = ClientRectangle.Width -
(int)(.4 * ClientRectangle.Width);
clickRectangleValue.Height = ClientRectangle.Height -
(int)(.4 * ClientRectangle.Height);
return clickRectangleValue;
}
}
// Draw the large or small button, depending on the current state.
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
// Draw the smaller pressed button image
if (state == PushButtonState.Pressed)
{
// Set the background color to the parent if visual styles
// are disabled, because DrawParentBackground will only paint
// over the control background if visual styles are enabled.
this.BackColor = Application.RenderWithVisualStyles ?
Color.Azure : this.Parent.BackColor;
// If you comment out the call to DrawParentBackground,
// the background of the control will still be visible
// outside the pressed button, if visual styles are enabled.
ButtonRenderer.DrawParentBackground(e.Graphics,
ClientRectangle, this);
ButtonRenderer.DrawButton(e.Graphics, ClickRectangle,
this.Text, this.Font, true, state);
}
// Draw the bigger unpressed button image.
else
{
ButtonRenderer.DrawButton(e.Graphics, ClientRectangle,
this.Text, this.Font, false, state);
}
}
// Draw the smaller pressed button image.
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
this.Text = "Clicked!";
state = PushButtonState.Pressed;
Invalidate();
}
// Draw the button in the hot state.
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
this.Text = "Click here";
state = PushButtonState.Hot;
Invalidate();
}
// Draw the button in the unpressed state.
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
this.Text = "Click here";
state = PushButtonState.Normal;
Invalidate();
}
// Draw the button hot if the mouse is released on the button.
protected override void OnMouseUp(MouseEventArgs e)
{
base.OnMouseUp(e);
OnMouseEnter(e);
}
// Detect when the cursor leaves the button area while
// it is pressed.
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
// Detect when the left mouse button is down and
// the cursor has left the pressed button area.
if ((e.Button & MouseButtons.Left) == MouseButtons.Left &&
!ClientRectangle.Contains(e.Location) &&
state == PushButtonState.Pressed)
{
OnMouseLeave(e);
}
}
}
}
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Windows.Forms.VisualStyles
Namespace ButtonRendererSample
Class Form1
Inherits Form
Public Sub New()
Dim Button1 As New CustomButton()
Controls.Add(Button1)
If Application.RenderWithVisualStyles Then
Me.Text = "Visual Styles Enabled"
Else
Me.Text = "Visual Styles Disabled"
End If
End Sub
<STAThread()> _
Shared Sub Main()
' If you do not call EnableVisualStyles below, then
' ButtonRenderer automatically detects this and draws
' the button without visual styles.
Application.EnableVisualStyles()
Application.Run(New Form1())
End Sub
End Class
Public Class CustomButton
Inherits Control
Private clickRectangleValue As New Rectangle()
Private state As PushButtonState = PushButtonState.Normal
Public Sub New()
With Me
Size = New Size(100, 40)
Location = New Point(50, 50)
Font = SystemFonts.IconTitleFont
Text = "Click here"
End With
End Sub
' Define the bounds of the smaller pressed button.
Public ReadOnly Property ClickRectangle() As Rectangle
Get
With clickRectangleValue
.X = Me.ClientRectangle.X + CInt(0.2 * _
Me.ClientRectangle.Width)
.Y = Me.ClientRectangle.Y + CInt(0.2 * _
Me.ClientRectangle.Height)
.Width = Me.ClientRectangle.Width - _
CInt(0.4 * Me.ClientRectangle.Width)
.Height = Me.ClientRectangle.Height - _
CInt(0.4 * Me.ClientRectangle.Height)
End With
Return clickRectangleValue
End Get
End Property
' Draw the large or small button, depending on the current state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
MyBase.OnPaint(e)
' Draw the smaller pressed button image.
If state = PushButtonState.Pressed Then
' Set the background color to the parent if visual styles
' are disabled, because DrawParentBackground will only paint
' over the control background if visual styles are enabled.
If Application.RenderWithVisualStyles Then
Me.BackColor = Color.Azure
Else
Me.BackColor = Me.Parent.BackColor
End If
' If you comment out the call to DrawParentBackground,
' the background of the control will still be visible
' outside the pressed button, if visual styles are enabled.
ButtonRenderer.DrawParentBackground(e.Graphics, _
Me.ClientRectangle, Me)
ButtonRenderer.DrawButton(e.Graphics, ClickRectangle, _
Me.Text, Me.Font, True, state)
' Draw the bigger unpressed button image.
Else
ButtonRenderer.DrawButton(e.Graphics, Me.ClientRectangle, _
Me.Text, Me.Font, False, state)
End If
End Sub
' Draw the smaller pressed button image.
Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
MyBase.OnMouseDown(e)
With Me
.Text = "Clicked!"
.state = PushButtonState.Pressed
End With
Invalidate()
End Sub
' Draw the button in the hot state.
Protected Overrides Sub OnMouseEnter(ByVal e As EventArgs)
MyBase.OnMouseEnter(e)
With Me
.Text = "Click here"
.state = PushButtonState.Hot
End With
Invalidate()
End Sub
' Draw the button in the unpressed state.
Protected Overrides Sub OnMouseLeave(ByVal e As EventArgs)
MyBase.OnMouseLeave(e)
With Me
.Text = "Click here"
.state = PushButtonState.Normal
End With
Invalidate()
End Sub
' Draw the button hot if the mouse is released on the button.
Protected Overrides Sub OnMouseUp(ByVal e As MouseEventArgs)
MyBase.OnMouseUp(e)
OnMouseEnter(e)
End Sub
' Detect when the cursor leaves the button area while it
' is pressed.
Protected Overrides Sub OnMouseMove(ByVal e As MouseEventArgs)
MyBase.OnMouseMove(e)
' Detect when the left mouse button is down and
' the cursor has left the pressed button area.
If (e.Button And MouseButtons.Left) = MouseButtons.Left And Not _
Me.ClientRectangle.Contains(e.Location) And _
state = PushButtonState.Pressed Then
OnMouseLeave(e)
End If
End Sub
End Class
End Namespace
注釈
このクラスには ButtonRenderer 、ボタン コントロールのレンダリングに使用できる一連の static メソッドが用意されています。 コントロールのレンダリングとは、コントロールのユーザー インターフェイスを描画することを意味します。 ボタンを描画するには、いずれかの方法を DrawButton 使用します。 これらのメソッドは、テキストの描画やボタン上の画像など、さまざまなオプションを提供します。
オペレーティング システムで表示スタイルが有効になっていて、表示スタイルが現在のアプリケーションに適用されている場合は、 DrawButton 現在の表示スタイルでボタンが描画されます。 それ以外の場合は、DrawButtonクラシック Windows スタイルでボタンを描画します。 これは、オペレーティング システムの現在の表示スタイル設定に自動的に一致するカスタム コントロールを描画する場合に便利です。
このクラスは、クラスによって公開される要素のいずれかに設定されている a の機能 System.Windows.Forms.VisualStyles.VisualStyleRenderer を System.Windows.Forms.VisualStyles.VisualStyleElement.Button.PushButton ラップします。 詳細については、「visual スタイルが使用されているコントロールのレンダリング」を参照してください。
プロパティ
| RenderMatchingApplicationState |
レンダラーがアプリケーション状態に応じて描画スタイルを決定するかどうかを示す値を取得または設定します。 |