/// <summary>
/// 设置拼图的缩放比例。
/// </summary>
/// <param name="scale">缩放比例。</param>
/// <param name="point">缩放的中心点，是当前的控件坐标。</param>
public void SetJigsawScale(float scale, Point center)
{
EventHandler <JigsawScaleChangedEventArgs> scaleChanging = this.JigsawScaleChanging;
if (scaleChanging != null)
{
JigsawScaleChangedEventArgs eventArgs = new JigsawScaleChangedEventArgs(scale);
scaleChanging(this, eventArgs);
scale = eventArgs.Scale;
}
if (this.jigsawScale == scale)
{
return;
}
this.jigsawScale = scale;
// 更新尺寸的同时移动滚动条，使缩放的中心点尽可能不变。
float oldWidth = jigsawRegion.Width;
Point scroll = new Point(this.HorizontalScroll.Value + center.X,
this.VerticalScroll.Value + center.Y);
UpdateSize();
// 这里强制重绘一次，防止出现闪烁。
this.Invalidate();
float rate = jigsawRegion.Width / oldWidth;
this.AutoScrollPosition = new Point((int)(scroll.X * rate - center.X), (int)(scroll.Y * rate - center.Y));
EventHandler scaleChanged = this.JigsawScaleChanged;
if (scaleChanged != null)
{
scaleChanged(this, null);
}
}
/// <summary>
/// 设置拼图的缩放比例。
/// </summary>
/// <param name="scale">缩放比例。</param>
/// <param name="point">缩放的中心点，是当前的控件坐标。</param>
public void SetJigsawScale(float scale, Point center)
{
EventHandler<JigsawScaleChangedEventArgs> scaleChanging = this.JigsawScaleChanging;
if (scaleChanging != null)
{
JigsawScaleChangedEventArgs eventArgs = new JigsawScaleChangedEventArgs(scale);
scaleChanging(this, eventArgs);
scale = eventArgs.Scale;
}
if (this.jigsawScale == scale)
{
return;
}
this.jigsawScale = scale;
// 更新尺寸的同时移动滚动条，使缩放的中心点尽可能不变。
float oldWidth = jigsawRegion.Width;
Point scroll = new Point(this.HorizontalScroll.Value + center.X,
this.VerticalScroll.Value + center.Y);
UpdateSize();
// 这里强制重绘一次，防止出现闪烁。
this.Invalidate();
float rate = jigsawRegion.Width / oldWidth;
this.AutoScrollPosition = new Point((int)(scroll.X * rate - center.X), (int)(scroll.Y * rate - center.Y));
EventHandler scaleChanged = this.JigsawScaleChanged;
if (scaleChanged != null)
{
scaleChanged(this, null);
}
}
/// <summary>
/// 拼图的缩放比例被改变之前的事件。
/// </summary>
private void renderPanel_JigsawScaleChanging(object sender, JigsawScaleChangedEventArgs e)
{
if (e.Scale < 0.1f)
{
e.Scale = 0.1f;
}
else if (e.Scale > 4f)
{
e.Scale = 4f;
}
float scale = e.Scale;
// 更新旧的鼠标位置。
float rate = scale / pieces.Scale;
lastMousePoint = new Vector2(lastMousePoint.X * rate, lastMousePoint.Y * rate);
// 更新阴影的偏移。
if (scale <= 1)
{
JigsawEffectRenderer effectRenderer = this.renderer as JigsawEffectRenderer;
if (effectRenderer != null)
{
effectRenderer.ShadowOffset = new Vector2(5 * scale, 5 * scale);
}
}
// 更新缩放比例。
this.gameInfo.Scale = scale;
this.pieces.Scale = scale;
}
