protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
if (UpDownButtonHandle != IntPtr.Zero && _upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
protected override void OnCreateControl()
{
base.OnCreateControl();
if (UpDownButtonHandle != IntPtr.Zero && _upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
protected override void OnHandleDestroyed(EventArgs e)
{
base.OnHandleDestroyed(e);
if (_upDownButtonNativeWindow != null)
{
_upDownButtonNativeWindow.Dispose();
_upDownButtonNativeWindow = null;
}
}
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_UpDownButtonNativeWindow == null)
{
_UpDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
}
protected override void OnControlAdded(ControlEventArgs e)
{
base.OnControlAdded(e);
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
}
/// <summary>
/// 检查是否存在左右按钮，有则以句柄创建一个upDownButtonNativeWindow。如果没有则将分配的的内存释放。
/// </summary>
private void checkUpDownButton()
{
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
else
{
if (_upDownButtonNativeWindow != null)
{
_upDownButtonNativeWindow.Dispose();
_upDownButtonNativeWindow = null;
}
}
}
protected override void OnHandleDestroyed(EventArgs e)
{
base.OnHandleDestroyed(e);
if (this._upDownButtonNativeWindow != null)
{
this._upDownButtonNativeWindow.Dispose();
this._upDownButtonNativeWindow = null;
}
}
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
if (this._upDownButtonNativeWindow == null)
{
this._upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
else
{
this.Refresh();
}
}
protected override void OnControlAdded(ControlEventArgs e)
{
base.OnControlAdded(e);
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
}
protected override void OnCreateControl()
{
base.OnCreateControl();
if (UpDownButtonHandle != IntPtr.Zero)
{
if (_upDownButtonNativeWindow == null)
{
_upDownButtonNativeWindow = new UpDownButtonNativeWindow(this);
}
}
}