/// <summary>
/// Layer was clicked outside any of its active elements
/// </summary>
private void OnLayerCaptionClicked(Point pnt, LegendLayer lyr, LegendGroup grp)
{
if (SelectedLayerHandle != lyr.Handle)
{
// a click on another layer; if there will be a second one in time
// we shall display propeties, but editing must not start unless there is
// one more click
//Debug.WriteLine("First click on unselected layer.");
_clickInfo.IsFirstClick = false;
_clickInfo.StartTimer(lyr.Handle, true);
}
else
{
if (_clickInfo.IsFirstClick)
{
// layer already selected, either editing or properties can be invoked
// depending on the presence of the second click in time
//Debug.WriteLine("A click on selected layer.");
_clickInfo.StartTimer(lyr.Handle, false);
}
else
{
_clickInfo.IsDoubleClick = _clickInfo.Milliseconds < SystemInformation.DoubleClickTime;
//Debug.WriteLine("Second click on the selected layer. Is double click: " + _clickInfo.IsDoubleClick);
return;
}
}
// Start dragging operation only if the clicked layer is selected.
// Otherwise LayerSelected event will be fired which might results in a dialog box
// from plugin code (TableEditor) and no Legend.MouseUp event (the dragging operation won't be finished).
if (SelectedLayerHandle == lyr.Handle)
{
if (Groups.Count > 1 || grp.Layers.Count > 1)
{
_dragInfo.StartLayerDrag(
pnt.Y,
Groups.PositionOf(grp.Handle),
grp.LayerPositionInGroup(lyr.Handle));
}
}
SelectedLayerHandle = lyr.Handle;
FireEvent(this, LayerMouseDown, new LayerMouseEventArgs(lyr.Handle, MouseButtons.Left));
}
private LegendElement FindClickedLayerElement(Point point, LegendLayer layer)
{
const int left = Constants.ListItemIndent;
var top = layer.Top;
var width = _legend.Width - left - Constants.ItemRightPad;
var height = layer.Height;
var bounds = new Rectangle(left, top, width, height);
if (!bounds.Contains(point))
{
return(null);
}
var elements = layer.Elements.OrderBy(el => (int)el.Type);
return(elements.FirstOrDefault(el => el.PointWithin(point)));
}
/// <summary>
/// Runs appropriate handler for the element that was clicked. If no handler is found false is returned.
/// </summary>
private bool OnLayerElementClicked(LegendLayer lyr, LegendElement element)
{
switch (element.Type)
{
case LayerElementType.RasterColorBox:
case LayerElementType.ColorBox:
if (element.Index == -1)
{
FireEvent(this, LayerStyleClicked, new LayerEventArgs(lyr.Handle));
}
else
{
FireEvent(this, LayerCategoryClicked, new LayerCategoryEventArgs(lyr.Handle, MouseButtons.Left, element.Index));
}
break;
case LayerElementType.Label:
FireEvent(this, LayerLabelsClicked, new LayerEventArgs(lyr.Handle));
break;
case LayerElementType.Charts:
case LayerElementType.ChartField:
case LayerElementType.ChartFieldName:
FireEvent(this, LayerDiagramsClicked, new LayerMouseEventArgs(lyr.Handle, MouseButtons.Left));
// event for individual fields can be fired if necessary
// FireEvent(this, LayerDiagramFieldClicked, new ChartFieldClickedEventArgs(lyr.Handle, MouseButtons.Left, element.Index));
break;
case LayerElementType.CategoryCheckbox:
var sf = AxMap.get_Shapefile(lyr.Handle);
if (sf != null)
{
var ct = sf.Categories.Item[element.Index];
if (ct != null)
{
bool state = ct.DrawingOptions.Visible;
ct.DrawingOptions.Visible = !state;
AxMap.Redraw();
}
}
break;
case LayerElementType.CheckBox:
{
var newState = !AxMap.get_LayerVisible(lyr.Handle);
var args = new LayerCancelEventArgs(lyr.Handle, newState);
FireEvent(this, LayerVisibleChanged, args);
if (args.Cancel)
{
return(true);
}
AxMap.set_LayerVisible(lyr.Handle, newState);
var group = GetGroup(element.GroupIndex);
group.UpdateGroupVisibility();
FireEvent(this, LayerCheckboxClicked, new LayerEventArgs(lyr.Handle));
}
break;
case LayerElementType.ExpansionBox:
{
Lock();
lyr.Expanded = !lyr.Expanded;
FireEvent(this, LayerPropertiesChanged, new LayerEventArgs(lyr.Handle));
Unlock();
return(true);
}
case LayerElementType.CategoriesCaption:
case LayerElementType.ChartsCaption:
Logger.Current.Info("Legend element clicked: " + element.Type + ". No handler is attached");
return(true);
case LayerElementType.Name:
case LayerElementType.None:
default:
return(false);
}
Redraw();
return(true);
}
