本文整理汇总了C#中System.Windows.Forms.ComboBoxRenderer.DrawDropDownButton方法的典型用法代码示例。如果您正苦于以下问题：C# ComboBoxRenderer.DrawDropDownButton方法的具体用法？C# ComboBoxRenderer.DrawDropDownButton怎么用？C# ComboBoxRenderer.DrawDropDownButton使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.ComboBoxRenderer的用法示例。
在下文中一共展示了ComboBoxRenderer.DrawDropDownButton方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
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();
}
}