public override void Event(object sender, enumCanvasEventType eventType, DrawingMouseEventArgs e)
{
base.Event(sender, eventType, e);
switch (eventType)
{
case enumCanvasEventType.MouseDown:
_startLocation.X = e.ScreenX;
_startLocation.Y = e.ScreenY;
_canvas.DummyRenderModeSupport.SetToDummyRenderMode();
break;
case enumCanvasEventType.MouseMove:
if (!_startLocation.IsEmpty)
{
HandleBox(sender as ICanvas, e);
}
break;
case enumCanvasEventType.MouseUp:
if (!_startLocation.IsEmpty && !_endLocation.IsEmpty)
{
_endLocation.X = e.ScreenX;
_endLocation.Y = e.ScreenY;
HandleZoom(sender as ICanvas, e);
_startLocation = PointF.Empty;
_endLocation = PointF.Empty;
_canvas.DummyRenderModeSupport.SetToNomralRenderMode();
(sender as ICanvas).Refresh(enumRefreshType.FlyLayer);
}
break;
}
}
private void HandleZoom(ICanvas canvas, DrawingMouseEventArgs e)
{
CoordEnvelope srcEnvelope = canvas.CurrentEnvelope;
CoordEnvelope dstEnvelope = GetDstEnvelope(canvas);
//by chennan 上海 修改大红叉
if (dstEnvelope == null)
{
return;
}
//
switch (_zoomType)
{
case enumZoomType.ZoomIn:
canvas.CurrentEnvelope = dstEnvelope;
break;
case enumZoomType.ZoomOut:
double panzoomFactor = Math.Min(srcEnvelope.Width / dstEnvelope.Width, srcEnvelope.Height / dstEnvelope.Height);
double inflateWidth = srcEnvelope.Width * panzoomFactor;
double inflateHeight = srcEnvelope.Height * panzoomFactor;
srcEnvelope.Inflate(inflateWidth, inflateHeight);
canvas.CurrentEnvelope = srcEnvelope;
break;
}
}
private void HandleBox(ICanvas canvas, DrawingMouseEventArgs e)
{
_endLocation.X = e.ScreenX;
_endLocation.Y = e.ScreenY;
canvas.Refresh(enumRefreshType.FlyLayer);
}
public virtual void Event(object sender, enumCanvasEventType eventType, DrawingMouseEventArgs e)
{
if (_canvas == null)
{
_canvas = sender as ICanvas;
}
switch (eventType)
{
case enumCanvasEventType.MouseDown:
if (_enabledPan)
{
_preLocation.X = e.ScreenX;
_preLocation.Y = e.ScreenY;
_canvas.DummyRenderModeSupport.SetToDummyRenderMode();
}
break;
case enumCanvasEventType.MouseMove:
if (_enabledPan)
{
if (_preLocation.IsEmpty)
{
return;
}
float offsetX = e.ScreenX - _preLocation.X;
float offsetY = e.ScreenY - _preLocation.Y;
if ((_canvas as IDummyRenderModeSupport).IsDummyModel)
{
_hasChanged = true;
}
ApplyOffset(sender as ICanvas, offsetX, offsetY);
_preLocation.X = e.ScreenX;
_preLocation.Y = e.ScreenY;
}
break;
case enumCanvasEventType.MouseUp:
if (_enabledPan)
{
_hasChanged = false;
_preLocation = PointF.Empty;
_canvas.DummyRenderModeSupport.SetToNomralRenderMode();
//if (_hasChanged)
_canvas.Refresh(enumRefreshType.All);
}
break;
case enumCanvasEventType.MouseWheel:
if (!_beginWheel /*&& (_canvas as IDummyRenderModeSupport).IsEnabledDummyCache*/)
{
_timerForWheel.Start();
(_canvas as IDummyRenderModeSupport).SetToDummyRenderMode();
_hasChanged = true;
}
ICanvas canvas = sender as ICanvas;
//Console.WriteLine("Wheel:" + e.WheelDelta.ToString());
int steps = 0;
if (e.WheelDelta > 0)
{
steps = _zoomStepsCalculator.GetZoomSteps(_canvas, e.WheelDelta, -1);
canvas.ZoomOutByStep(e.ScreenX, e.ScreenY, steps);
}
else
{
steps = _zoomStepsCalculator.GetZoomSteps(_canvas, e.WheelDelta, 1);
canvas.ZoomInByStep(e.ScreenX, e.ScreenY, steps);
}
//Console.WriteLine("Steps:" + steps.ToString());
_lastTicks = Environment.TickCount;
break;
}
}