/// <summary>
/// Displays textbox with layer name.
/// </summary>
private void ShowTextBox(int layerHandle)
{
var layer = Layers.ItemByHandle(layerHandle) as LegendLayer;
if (layer == null)
{
return;
}
var el = layer.Elements.FirstOrDefault(item => item.Type == LayerElementType.Name &&
item.LayerHandle == layer.Handle);
if (el == null)
{
return;
}
var txt = TextBox;
txt.Visible = true;
txt.Left = el.Left;
txt.Top = el.Top;
txt.Width = el.Width;
txt.Height = el.Height;
if (txt.Height > el.Height)
{
int dy = Convert.ToInt32((txt.Height - el.Height) / 2.0);
txt.Top -= dy;
}
txt.Text = layer.Name;
txt.SelectAll();
txt.LostFocus += txt_LostFocus;
txt.KeyDown += txt_KeyDown;
Controls.Add(TextBox);
TextBox.Focus();
_activeElement = el;
}
/// <summary>
/// Locates the layer that was clicked on in the legend.
/// </summary>
public LegendLayer FindClickedLayer(Point point, out LegendElement element)
{
element = new LegendElement(LayerElementType.None, new Rectangle());
var groups = _legend.Groups as LegendGroups;
if (groups == null)
{
return(null);
}
var groupCount = groups.Count;
for (var i = 0; i < groupCount; i++)
{
var grp = GetGroup(i);
if (!grp.Expanded)
{
continue;
}
var layerCount = grp.Layers.Count;
for (var j = 0; j < layerCount; j++)
{
var lyr = grp.LayersList[j];
element = FindClickedLayerElement(point, lyr);
if (element != null)
{
element.GroupIndex = i;
element.LayerHandle = lyr.Handle;
return(lyr);
}
}
}
return(null);
}
public LegendLayer FindClickedLayer(Point point, out LegendElement element)
{
return(HitTest.FindClickedLayer(point, out element));
}
/// <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);
}
