本文整理匯總了C#中System.Windows.Forms.ComboBoxRenderer.DrawDropDownButton方法的典型用法代碼示例。如果您正苦於以下問題：C# ComboBoxRenderer.DrawDropDownButton方法的具體用法？C# ComboBoxRenderer.DrawDropDownButton怎麽用？C# ComboBoxRenderer.DrawDropDownButton使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Windows.Forms.ComboBoxRenderer的用法示例。
在下文中一共展示了ComboBoxRenderer.DrawDropDownButton方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: OnPaint
// Draw the combo box in the current state.
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (!ComboBoxRenderer.IsSupported)
{
this.Parent.Text = "Visual Styles Disabled";
return;
}
this.Parent.Text = "CustomComboBox Enabled";
// Always draw the main text box and drop down arrow in their
// current states
ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle,
this.Text, this.Font, textBoxState);
ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle,
arrowState);
// Only draw the bottom text box if the arrow has been clicked
if (isActivated)
{
ComboBoxRenderer.DrawTextBox(e.Graphics,
bottomTextBoxRectangle, bottomText, this.Font,
textBoxState);
}
}
protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
// Check whether the user clicked the arrow.
if (arrowRectangle.Contains(e.Location) &&
ComboBoxRenderer.IsSupported)
{
// Draw the arrow in the pressed state.
arrowState = ComboBoxState.Pressed;
// The user has activated the combo box.
if (!isActivated)
{
this.Text = "Clicked!";
textBoxState = ComboBoxState.Pressed;
isActivated = true;
}
// The user has deactivated the combo box.
else
{
this.Text = "Click here";
textBoxState = ComboBoxState.Normal;
isActivated = false;
}
// Redraw the control.
Invalidate();
}
}