/// <summary>
/// 展开
/// </summary>
public void Expand()
{
if (this.state != ExtendedPanelState.Collapsed)
{
throw new InvalidOperationException("控制必须在扩大后的状态，并要求被收起!");
}
DirectionStyle oldStyle = DirectionStyle.Down;
DirectionStyle newStyle = DirectionStyle.Up;
switch (captionAlign)
{
case DirectionStyle.Up: //set above
break;
case DirectionStyle.Left:
oldStyle = DirectionStyle.Right;
newStyle = DirectionStyle.Left;
break;
case DirectionStyle.Right:
oldStyle = DirectionStyle.Left;
newStyle = DirectionStyle.Right;
break;
case DirectionStyle.Down:
oldStyle = DirectionStyle.Up;
newStyle = DirectionStyle.Down;
break;
}
this.captionCtrl.SetDirectionStyle(newStyle);
ChangeStyleEventArgs args = new ChangeStyleEventArgs(oldStyle, newStyle);
CollapsingHandler(this, args);
}
private void CollapsingHandler(object sender, ChangeStyleEventArgs e)
{
//check to see if Anchoring needs special treatment
if (this.captionAlign == DirectionStyle.Right || this.captionAlign == DirectionStyle.Down)
{
backupAnchor = this.Anchor;
this.Anchor |= AnchorStyles.Left;
this.Anchor |= AnchorStyles.Top;
this.Anchor &= ~AnchorStyles.Right;
this.Anchor &= ~AnchorStyles.Bottom;
}
//create the thread for collasping/expanding the control
if (null == collapseAnimation)
{
collapseAnimation = new CollapseAnimation();
//set the events to be raised by the animation worker thread
collapseAnimation.NotifyAnimation += new NotifyAnimationEvent(OnNotifyAnimationEvent);
collapseAnimation.NotifyAnimationFinished += new NotifyAnimationFinishedEvent(OnNotifyAnimationFinished);
if (backupHeight == 0)
{
backupHeight = this.Height;
}
if (backupWidth == 0)
{
backupWidth = this.Width;
}
}
switch (this.captionAlign)
{
case DirectionStyle.Up:
if (e.Old == DirectionStyle.Up)
{
backupHeight = this.Height;
backupWidth = this.Width;
collapseAnimation.Maximum = this.Height;
collapseAnimation.Minimum = captionCtrl.Height;
if (animation == Animation.Yes)
{
collapseAnimation.Step = step;
}
else
{
collapseAnimation.Step = this.Height - captionCtrl.Height;
}
}
else
{
collapseAnimation.Maximum = backupHeight;
collapseAnimation.Minimum = captionCtrl.Height;
if (animation == Animation.Yes)
{
collapseAnimation.Step = -step;
}
else
{
collapseAnimation.Step = -(backupHeight - captionCtrl.Height);
}
}
break;
case DirectionStyle.Down:
if (e.Old == DirectionStyle.Down)
{
//have to extract caption ctrl because of the flickering involved
ChangeCaptionParent();
//save the size as will need them for expanding the control back
backupHeight = this.Height;
backupWidth = this.Width;
collapseAnimation.Maximum = this.Height;
collapseAnimation.Minimum = captionCtrl.Height;
if (animation == Animation.Yes)
{
collapseAnimation.Step = step;
}
else
{
collapseAnimation.Step = this.Height - captionCtrl.Height;
}
}
else
{
//have to extract caption ctrl because of the flickering involved
ChangeCaptionParent();
collapseAnimation.Maximum = backupHeight;
collapseAnimation.Minimum = captionCtrl.Height;
if (animation == Animation.Yes)
{
collapseAnimation.Step = -step;
}
else
{
collapseAnimation.Step = -(backupHeight - captionCtrl.Height);
}
}
break;
case DirectionStyle.Left:
if (e.Old == DirectionStyle.Left)
{
//save the size as will need them for expanding the control back
backupHeight = this.Height;
backupWidth = this.Width;
collapseAnimation.Maximum = this.Width;
collapseAnimation.Minimum = captionCtrl.Width;
if (animation == Animation.Yes)
{
collapseAnimation.Step = step;
}
else
{
collapseAnimation.Step = this.Width - captionCtrl.Width;
}
}
else
{
collapseAnimation.Maximum = backupWidth;
collapseAnimation.Minimum = captionCtrl.Width;
if (animation == Animation.Yes)
{
collapseAnimation.Step = -step;
}
else
{
collapseAnimation.Step = -(backupWidth - captionCtrl.Width);
}
}
break;
case DirectionStyle.Right:
if (e.Old == DirectionStyle.Right)
{
//have to extract caption ctrl because of the flickering involved
ChangeCaptionParent();
backupHeight = this.Height;
backupWidth = this.Width;
collapseAnimation.Maximum = this.Width;
collapseAnimation.Minimum = captionCtrl.Width;
if (animation == Animation.Yes)
{
collapseAnimation.Step = step;
}
else
{
collapseAnimation.Step = this.Width - captionCtrl.Width;
}
}
else
{
//have to extract caption ctrl because of the flickering involved
ChangeCaptionParent();
collapseAnimation.Maximum = backupWidth;
collapseAnimation.Minimum = captionCtrl.Width;
if (animation == Animation.Yes)
{
collapseAnimation.Step = -step;
}
else
{
collapseAnimation.Step = -(backupWidth - captionCtrl.Width);
}
}
break;
}
SetState();
ShowControls();
//start collapsing/expanding and set the new state
if (state == ExtendedPanelState.Collapsed)
{
state = ExtendedPanelState.Expanding;
}
else
{
if (state == ExtendedPanelState.Expanded)
{
state = ExtendedPanelState.Collapsing;
}
}
collapseAnimation.Start();
}