public Envelope GetFullEnvelope()
{
if (_layerContainer == null || _layerContainer.IsEmpty())
{
return(null);
}
Envelope evp = null;
for (int i = 0; i < _layerContainer.Layers.Length; i++)
{
IClass fetclass = _layerContainer.Layers[i].Class as IClass;
if (fetclass.IsEmpty())
{
continue;
}
if (evp == null)
{
evp = fetclass.FullEnvelope.Clone() as Envelope;
}
evp.UnionWith(fetclass.FullEnvelope);
}
return(evp);
}
public void Render(RenderArgs arg)
{
if (_map == null || _isDisposed)
{
return;
}
ILayerContainer layerContainer = _map.LayerContainer;
if (layerContainer.IsEmpty() || _environment.CanvasSize == Size.Empty)
{
return;
}
#if DEBUG
int time = Environment.TickCount;
#endif
bool transformIsChanged = _preMapTransform == null || !MathHelper.MatrixIsSame(_preMapTransform, arg.Graphics.Transform);
bool envelopeIsChanged = _preFocusEnvelope == null || !_preFocusEnvelope.IsEquals(_environment.FocusEnvelope);
transformIsChanged = transformIsChanged || envelopeIsChanged;
bool needComputeViewportPrjAgain = true;
//for web
transformIsChanged = true;
//
if (transformIsChanged)
{
if (_transformChanged != null)
{
_transformChanged(this, null, null);
}
UpdateViewportAndTransformMatrix();
needComputeViewportPrjAgain = false;
}
Matrix oldM = arg.Graphics.Transform;
bool needRember = false;
try
{
arg.Graphics.Transform = _transformIdentity;
if (_environment.UseDummyMap && _dummyBitmap != null)
{
RenderUseDummyBitmap(arg);
}
else
{
if (transformIsChanged || layerContainer.LayerIsChanged || arg.IsReRender || _dummyBitmap == null)
{
ReRender(arg, needComputeViewportPrjAgain);
needRember = true;
(layerContainer as LayerContainer).ResetLayerIsChanged();
}
else
{
RenderUseDummyBitmap(arg);
}
}
}
finally
{
//画比例尺条
if (_scaleBarArgs != null && _scaleBarArgs.Enabled)
{
DrawScaleBar(arg.Graphics);
}
//画临时图层
DrawHandinessLayers(arg);
//
arg.Graphics.Transform = oldM;
arg.IsReRender = false;
arg.IsRendering = false;
}
if (needRember)
{
RemeberPreTransform(arg);
}
if (envelopeIsChanged)
{
if (_onViewExtentChanged != null)
{
_onViewExtentChanged.BeginInvoke(this, _environment.FocusEnvelope, null, null);
}
}
#if DEBUG
time = Environment.TickCount - time;
//Console.WriteLine("lost:" + time.ToString());
//_environment.Container.FindForm().Text = time.ToString();
#endif
}
