ToolStripRenderer 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。
ToolStrip オブジェクトの描画機能を処理します。
public ref class ToolStripRenderer abstractpublic abstract class ToolStripRenderertype ToolStripRenderer = classPublic MustInherit Class ToolStripRenderer- 継承
-
ToolStripRenderer
- 派生
例
次のコード例は、カスタムの ToolStripRenderer クラスを実装する方法を示しています クラスはGridStripRenderer、コントロールの外観GridStripの 3 つの側面 (GridStrip罫線、罫線、ToolStripButton画像) をToolStripButtonカスタマイズします。 完全なコード一覧については、「 方法: カスタム ToolStripRenderer を実装する」を参照してください。
// This class implements a custom ToolStripRenderer for the
// GridStrip control. It customizes three aspects of the
// GridStrip control's appearance: GridStrip border,
// ToolStripButton border, and ToolStripButton image.
internal class GridStripRenderer : ToolStripRenderer
{
// The style of the empty cell's text.
private static StringFormat style = new StringFormat();
// The thickness (width or height) of a
// ToolStripButton control's border.
static int borderThickness = 2;
// The main bitmap that is the source for the
// subimagesthat are assigned to individual
// ToolStripButton controls.
private Bitmap bmp = null;
// The brush that paints the background of
// the GridStrip control.
private Brush backgroundBrush = null;
// This is the static constructor. It initializes the
// StringFormat for drawing the text in the empty cell.
static GridStripRenderer()
{
style.Alignment = StringAlignment.Center;
style.LineAlignment = StringAlignment.Center;
}
// This method initializes the GridStripRenderer by
// creating the image that is used as the source for
// the individual button images.
protected override void Initialize(ToolStrip ts)
{
base.Initialize(ts);
this.InitializeBitmap(ts);
}
// This method initializes an individual ToolStripButton
// control. It copies a subimage from the GridStripRenderer's
// main image, according to the position and size of
// the ToolStripButton.
protected override void InitializeItem(ToolStripItem item)
{
base.InitializeItem(item);
GridStrip gs = item.Owner as GridStrip;
// The empty cell does not receive a subimage.
if ((item is ToolStripButton) &&
(item != gs.EmptyCell))
{
// Copy the subimage from the appropriate
// part of the main image.
Bitmap subImage = bmp.Clone(
item.Bounds,
PixelFormat.Undefined);
// Assign the subimage to the ToolStripButton
// control's Image property.
item.Image = subImage;
}
}
// This utility method creates the main image that
// is the source for the subimages of the individual
// ToolStripButton controls.
private void InitializeBitmap(ToolStrip toolStrip)
{
// Create the main bitmap, into which the image is drawn.
this.bmp = new Bitmap(
toolStrip.Size.Width,
toolStrip.Size.Height);
// Draw a fancy pattern. This could be any image or drawing.
using (Graphics g = Graphics.FromImage(bmp))
{
// Draw smoothed lines.
g.SmoothingMode = SmoothingMode.AntiAlias;
// Draw the image. In this case, it is
// a number of concentric ellipses.
for (int i = 0; i < toolStrip.Size.Width; i += 8)
{
g.DrawEllipse(Pens.Blue, 0, 0, i, i);
}
}
}
// This method draws a border around the GridStrip control.
protected override void OnRenderToolStripBorder(
ToolStripRenderEventArgs e)
{
base.OnRenderToolStripBorder(e);
ControlPaint.DrawFocusRectangle(
e.Graphics,
e.AffectedBounds,
SystemColors.ControlDarkDark,
SystemColors.ControlDarkDark);
}
// This method renders the GridStrip control's background.
protected override void OnRenderToolStripBackground(
ToolStripRenderEventArgs e)
{
base.OnRenderToolStripBackground(e);
// This late initialization is a workaround. The gradient
// depends on the bounds of the GridStrip control. The bounds
// are dependent on the layout engine, which hasn't fully
// performed layout by the time the Initialize method runs.
if (this.backgroundBrush == null)
{
this.backgroundBrush = new LinearGradientBrush(
e.ToolStrip.ClientRectangle,
SystemColors.ControlLightLight,
SystemColors.ControlDark,
90,
true);
}
// Paint the GridStrip control's background.
e.Graphics.FillRectangle(
this.backgroundBrush,
e.AffectedBounds);
}
// This method draws a border around the button's image. If the background
// to be rendered belongs to the empty cell, a string is drawn. Otherwise,
// a border is drawn at the edges of the button.
protected override void OnRenderButtonBackground(
ToolStripItemRenderEventArgs e)
{
base.OnRenderButtonBackground(e);
// Define some local variables for convenience.
Graphics g = e.Graphics;
GridStrip gs = e.ToolStrip as GridStrip;
ToolStripButton gsb = e.Item as ToolStripButton;
// Calculate the rectangle around which the border is painted.
Rectangle imageRectangle = new Rectangle(
borderThickness,
borderThickness,
e.Item.Width - 2 * borderThickness,
e.Item.Height - 2 * borderThickness);
// If rendering the empty cell background, draw an
// explanatory string, centered in the ToolStripButton.
if (gsb == gs.EmptyCell)
{
e.Graphics.DrawString(
"Drag to here",
gsb.Font,
SystemBrushes.ControlDarkDark,
imageRectangle, style);
}
else
{
// If the button can be a drag source, paint its border red.
// otherwise, paint its border a dark color.
Brush b = gs.IsValidDragSource(gsb) ? b =
Brushes.Red : SystemBrushes.ControlDarkDark;
// Draw the top segment of the border.
Rectangle borderSegment = new Rectangle(
0,
0,
e.Item.Width,
imageRectangle.Top);
g.FillRectangle(b, borderSegment);
// Draw the right segment.
borderSegment = new Rectangle(
imageRectangle.Right,
0,
e.Item.Bounds.Right - imageRectangle.Right,
imageRectangle.Bottom);
g.FillRectangle(b, borderSegment);
// Draw the left segment.
borderSegment = new Rectangle(
0,
0,
imageRectangle.Left,
e.Item.Height);
g.FillRectangle(b, borderSegment);
// Draw the bottom segment.
borderSegment = new Rectangle(
0,
imageRectangle.Bottom,
e.Item.Width,
e.Item.Bounds.Bottom - imageRectangle.Bottom);
g.FillRectangle(b, borderSegment);
}
}
}
' This class implements a custom ToolStripRenderer for the
' GridStrip control. It customizes three aspects of the
' GridStrip control's appearance: GridStrip border,
' ToolStripButton border, and ToolStripButton image.
Friend Class GridStripRenderer
Inherits ToolStripRenderer
' The style of the empty cell's text.
Private Shared style As New StringFormat()
' The thickness (width or height) of a
' ToolStripButton control's border.
Private Shared borderThickness As Integer = 2
' The main bitmap that is the source for the
' subimagesthat are assigned to individual
' ToolStripButton controls.
Private bmp As Bitmap = Nothing
' The brush that paints the background of
' the GridStrip control.
Private backgroundBrush As Brush = Nothing
' This is the static constructor. It initializes the
' StringFormat for drawing the text in the empty cell.
Shared Sub New()
style.Alignment = StringAlignment.Center
style.LineAlignment = StringAlignment.Center
End Sub
' This method initializes the GridStripRenderer by
' creating the image that is used as the source for
' the individual button images.
Protected Overrides Sub Initialize(ts As ToolStrip)
MyBase.Initialize(ts)
Me.InitializeBitmap(ts)
End Sub
' This method initializes an individual ToolStripButton
' control. It copies a subimage from the GridStripRenderer's
' main image, according to the position and size of
' the ToolStripButton.
Protected Overrides Sub InitializeItem(item As ToolStripItem)
MyBase.InitializeItem(item)
Dim gs As GridStrip = item.Owner
' The empty cell does not receive a subimage.
If ((TypeOf (item) Is ToolStripButton) And _
(item IsNot gs.EmptyCell)) Then
' Copy the subimage from the appropriate
' part of the main image.
Dim subImage As Bitmap = bmp.Clone(item.Bounds, PixelFormat.Undefined)
' Assign the subimage to the ToolStripButton
' control's Image property.
item.Image = subImage
End If
End Sub
' This utility method creates the main image that
' is the source for the subimages of the individual
' ToolStripButton controls.
Private Sub InitializeBitmap(toolStrip As ToolStrip)
' Create the main bitmap, into which the image is drawn.
Me.bmp = New Bitmap(toolStrip.Size.Width, toolStrip.Size.Height)
' Draw a fancy pattern. This could be any image or drawing.
Dim g As Graphics = Graphics.FromImage(bmp)
Try
' Draw smoothed lines.
g.SmoothingMode = SmoothingMode.AntiAlias
' Draw the image. In this case, it is
' a number of concentric ellipses.
Dim i As Integer
For i = 0 To toolStrip.Size.Width - 8 Step 8
g.DrawEllipse(Pens.Blue, 0, 0, i, i)
Next i
Finally
g.Dispose()
End Try
End Sub
' This method draws a border around the GridStrip control.
Protected Overrides Sub OnRenderToolStripBorder(e As ToolStripRenderEventArgs)
MyBase.OnRenderToolStripBorder(e)
ControlPaint.DrawFocusRectangle(e.Graphics, e.AffectedBounds, SystemColors.ControlDarkDark, SystemColors.ControlDarkDark)
End Sub
' This method renders the GridStrip control's background.
Protected Overrides Sub OnRenderToolStripBackground(e As ToolStripRenderEventArgs)
MyBase.OnRenderToolStripBackground(e)
' This late initialization is a workaround. The gradient
' depends on the bounds of the GridStrip control. The bounds
' are dependent on the layout engine, which hasn't fully
' performed layout by the time the Initialize method runs.
If Me.backgroundBrush Is Nothing Then
Me.backgroundBrush = New LinearGradientBrush(e.ToolStrip.ClientRectangle, SystemColors.ControlLightLight, SystemColors.ControlDark, 90, True)
End If
' Paint the GridStrip control's background.
e.Graphics.FillRectangle(Me.backgroundBrush, e.AffectedBounds)
End Sub
' This method draws a border around the button's image. If the background
' to be rendered belongs to the empty cell, a string is drawn. Otherwise,
' a border is drawn at the edges of the button.
Protected Overrides Sub OnRenderButtonBackground(e As ToolStripItemRenderEventArgs)
MyBase.OnRenderButtonBackground(e)
' Define some local variables for convenience.
Dim g As Graphics = e.Graphics
Dim gs As GridStrip = e.ToolStrip
Dim gsb As ToolStripButton = e.Item
' Calculate the rectangle around which the border is painted.
Dim imageRectangle As New Rectangle(borderThickness, borderThickness, e.Item.Width - 2 * borderThickness, e.Item.Height - 2 * borderThickness)
' If rendering the empty cell background, draw an
' explanatory string, centered in the ToolStripButton.
If gsb Is gs.EmptyCell Then
e.Graphics.DrawString("Drag to here", gsb.Font, SystemBrushes.ControlDarkDark, imageRectangle, style)
Else
' If the button can be a drag source, paint its border red.
' otherwise, paint its border a dark color.
Dim b As Brush = IIf(gs.IsValidDragSource(gsb), Brushes.Red, SystemBrushes.ControlDarkDark)
' Draw the top segment of the border.
Dim borderSegment As New Rectangle(0, 0, e.Item.Width, imageRectangle.Top)
g.FillRectangle(b, borderSegment)
' Draw the right segment.
borderSegment = New Rectangle(imageRectangle.Right, 0, e.Item.Bounds.Right - imageRectangle.Right, imageRectangle.Bottom)
g.FillRectangle(b, borderSegment)
' Draw the left segment.
borderSegment = New Rectangle(0, 0, imageRectangle.Left, e.Item.Height)
g.FillRectangle(b, borderSegment)
' Draw the bottom segment.
borderSegment = New Rectangle(0, imageRectangle.Bottom, e.Item.Width, e.Item.Bounds.Bottom - imageRectangle.Bottom)
g.FillRectangle(b, borderSegment)
End If
End Sub
End Class
注釈
クラスを ToolStripRenderer 使用して、特定のスタイルまたはテーマを に ToolStrip適用します。 に含まれるオブジェクトをToolStripItemユーザー設定で描画ToolStripするのではなく、 プロパティを ToolStrip.Renderer からToolStripRenderer継承する オブジェクトに設定します。 によって ToolStripRenderer 指定された塗りつぶしは、 ToolStrip含まれている項目と同様に に適用されます。
ToolStrip コントロールを使用すると、複数の方法でカスタム描画を行うことができます。 他の Windows フォーム コントロールと同様に、ToolStrip と ToolStripItem のどちらにも、オーバーライド可能 な OnPaint メソッドと Paint イベントがあります。 通常の描画と同様に、座標系の基準はコントロールのクライアント領域です。つまり、コントロールの左上隅が 0, 0 です。
ToolStripItem の Paint イベントと OnPaint メソッドは、他のコントロール描画イベントと同様に動作します。
ToolStripRendererクラスには、 の背景、項目の背景、項目イメージ、項目矢印、項目テキスト、および罫線を描画するためのオーバーライド可能なメソッドがありますToolStrip。 これらのメソッドのイベント引数により、四角形、色、テキストの書式など、必要に応じて調整できるいくつかのプロパティが公開されています。
項目の描画方法に関するいくつかの側面だけを調整するには、通常、ToolStripRenderer をオーバーライドします。
新しい項目を作成していて、描画のすべての側面を制御したい場合は、OnPaint メソッドをオーバーライドします。
OnPaint 内から、ToolStripRenderer のメソッドを使用できます。
既定では、ToolStrip によってダブル バッファリングが行われ、OptimizedDoubleBuffer の設定が利用されます。
コンストラクター
| ToolStripRenderer() |
ToolStripRenderer クラスの新しいインスタンスを初期化します。 |
フィールド
| Offset2X |
x 軸に沿ってオフセットを 2 倍にするためのオフセット乗数を取得または設定します。 |
| Offset2Y |
y 軸に沿ってオフセットを 2 倍にするためのオフセット乗数を取得または設定します。 |
メソッド
イベント
適用対象
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