本文整理汇总了VB.NET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：VB.NET ComboBoxRenderer.DrawDropDownButton方法的具体用法？VB.NET ComboBoxRenderer.DrawDropDownButton怎么用？VB.NET ComboBoxRenderer.DrawDropDownButton使用的例子？那么恭喜您, 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VB.NET代码示例。
示例1: OnPaint
' Draw the combo box in the current state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
MyBase.OnPaint(e)
If Not ComboBoxRenderer.IsSupported Then
Me.Parent.Text = "Visual Styles Disabled"
Return
End If
Me.Parent.Text = "CustomComboBox Enabled"
' Always draw the main text box and drop down arrow in their
' current states.
ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle, _
Me.Text, Me.Font, textBoxState)
ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle, _
arrowState)
' Only draw the bottom text box if the arrow has been clicked.
If isActivated Then
ComboBoxRenderer.DrawTextBox(e.Graphics, _
bottomTextBoxRectangle, bottomText, Me.Font, textBoxState)
End If
End Sub
Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
MyBase.OnMouseDown(e)
' Check whether the user clicked the arrow.
If arrowRectangle.Contains(e.Location) And _
ComboBoxRenderer.IsSupported Then
' Draw the arrow in the pressed state.
arrowState = ComboBoxState.Pressed
' The user has activated the combo box.
If Not isActivated Then
Me.Text = "Clicked!"
textBoxState = ComboBoxState.Pressed
isActivated = True
' The user has deactivated the combo box.
Else
Me.Text = "Click here"
textBoxState = ComboBoxState.Normal
isActivated = False
End If
' Redraw the control.
Invalidate()
End If
End Sub