ControlPaint.FillReversibleRectangle メソッドとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

ControlPaint.FillReversibleRectangle メソッド

画面上の塗りつぶされた反転できる四角形を描画します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

Public Shared Sub FillReversibleRectangle
 ( _
    rectangle As Rectangle, _
    backColor As Color _
)

Visual Basic (使用法)

Dim rectangle As Rectangle
Dim backColor As Color

ControlPaint.FillReversibleRectangle(rectangle, backColor)

public static void FillReversibleRectangle
 (
    Rectangle rectangle,
    Color backColor
)

C++

public:
static void FillReversibleRectangle (
    Rectangle rectangle, 
    Color backColor
)

public static void FillReversibleRectangle
 (
    Rectangle rectangle, 
    Color backColor
)

JScript

public static function FillReversibleRectangle
 (
    rectangle : Rectangle, 
    backColor : Color
)

パラメータ

rectangle: 塗りつぶす四角形の大きさを、画面座標で表す Rectangle。

backColor: 塗りつぶしの背景の Color。

解説

backColor パラメータを使用して、四角形が背景に対して常に表示されるように、四角形の塗りつぶし色を計算します。

このメソッドの結果、同じ四角形を再び描画することによって反転できます。このメソッドを使用して四角形を描画すると、画面の領域を反転した場合と同様の結果が得られますが、より幅広い色についてより優れたパフォーマンスが得られます。

使用例

FillReversibleRectangle メソッドを使用するコード例を次に示します。この例を実行するには、次のコードをフォームに貼り付けます。そして、Button2 という名前のボタンをフォームに追加し、すべてのイベントを必ずそれぞれのイベントハンドラに関連付けます。

Visual Basic

' When the mouse hovers over Button2, its ClientRectangle is filled.
Private Sub Button2_MouseHover(ByVal
 sender As Object, _
    ByVal e As System.EventArgs) Handles
 Button2.MouseHover

    Dim senderControl As Control = CType(sender,
 Control)
    Dim screenRectangle As Rectangle = _
        senderControl.RectangleToScreen(senderControl.ClientRectangle)
    ControlPaint.FillReversibleRectangle(screenRectangle, _
        senderControl.BackColor)
End Sub


' When the mouse leaves Button2, its ClientRectangle is cleared by
' calling the FillReversibleRectangle method again.
Private Sub Button2_MouseLeave(ByVal
 sender As Object, _
    ByVal e As System.EventArgs) Handles
 Button2.MouseLeave

    Dim senderControl As Control = CType(sender,
 Control)
    Dim screenRectangle As Rectangle = _
        senderControl.RectangleToScreen(senderControl.ClientRectangle)
    ControlPaint.FillReversibleRectangle(screenRectangle, _
        senderControl.BackColor)
End Sub

//When the mouse hovers over Button2, its ClientRectangle is filled.
private void Button2_MouseHover(object sender,
 System.EventArgs e)
{
    Control senderControl = (Control) sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.ClientRectangle);
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.BackColor);
}

// When the mouse leaves Button2, its ClientRectangle is cleared by
// calling the FillReversibleRectangle method again.
private void Button2_MouseLeave(object sender,
 System.EventArgs e)
{
    Control senderControl = (Control) sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.ClientRectangle);
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.BackColor);
}

C++

//When the mouse hovers over Button2, its ClientRectangle is filled.
void Button2_MouseHover( Object^ sender, System::EventArgs^ /*e*/
 )
{
   Control^ senderControl = dynamic_cast<Control^>(sender);
   Rectangle screenRectangle = senderControl->RectangleToScreen( senderControl->ClientRectangle
 );
   ControlPaint::FillReversibleRectangle( screenRectangle, senderControl->BackColor
 );
}

// When the mouse leaves Button2, its ClientRectangle is cleared by
// calling the FillReversibleRectangle method again.
void Button2_MouseLeave( Object^ sender, System::EventArgs^ /*e*/
 )
{
   Control^ senderControl = dynamic_cast<Control^>(sender);
   Rectangle screenRectangle = senderControl->RectangleToScreen( senderControl->ClientRectangle
 );
   ControlPaint::FillReversibleRectangle( screenRectangle, senderControl->BackColor
 );
}

//When the mouse hovers over button2, its ClientRectangle is filled.
private void button2_MouseHover(Object sender,
 System.EventArgs e)
{
    Control senderControl = (Control)sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.get_ClientRectangle());
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.get_BackColor());
} //button2_MouseHover

// When the mouse leaves button2, its ClientRectangle is cleared by
// calling the FillReversibleRectangle method again.
private void button2_MouseLeave(Object sender,
 System.EventArgs e)
{
    Control senderControl = (Control)sender;
    Rectangle screenRectangle = senderControl.RectangleToScreen(
        senderControl.get_ClientRectangle());
    ControlPaint.FillReversibleRectangle(screenRectangle, 
        senderControl.get_BackColor());
} //button2_MouseLeave