/// <summary> Updates the list of layers to be shown in the gadget. </summary>
private void UpdateLayerList()
{
LayersStack.Children.Clear();
LayersStack.RowDefinitions.Clear();
LayersStack.Margin = new Thickness(1);
layerIndices.Clear();
// Since the header size is calculated on the longest layer caption we have to ensure
// that in case of a layer stack modification the header size is recalculated. We force this
// by setting 'headerSizeSet' to false.
headerSizeSet = false;
foreach (var item in layers.Select((layer, index) => new { layer, index }))
{
item.layer.PropertyChanged += layer_PropertyChanged;
if (LayerListReverted)
{
layerIndices.Add(item.index);
}
else
{
layerIndices.Insert(0, item.index);
}
}
foreach (var item in layerIndices.Select((t, index) => new { layer = layers[t], index }))
{
LayersStack.RowDefinitions.Add(new RowDefinition());
var label = new Label {
Tag = item.layer.Name, Padding = new Thickness(-1), Margin = LayersStack.Margin
};
// opacityBinding is needed for the image and the layer name -> create once and bind it multiple times
var opacityBinding = new Binding("Opacity")
{
Source = label
};
// Create the text block first because the image size depends on the fond size.
var textBlock = new TextBlock
{
Tag = item.layer.Name,
Text = item.layer.Caption,
Padding = new Thickness(2),
HorizontalAlignment = HorizontalAlignment.Stretch,
VerticalAlignment = VerticalAlignment.Center,
FontWeight = FontWeights.Normal,
FontSize = HeaderText.FontSize
};
textBlock.SetBinding(OpacityProperty, opacityBinding);
if (item.layer.HasSettingsDialog)
{
textBlock.MouseLeftButtonUp += textBlock_MouseLeftButtonUp;
textBlock.TextDecorations.Add(TextDecorations.Underline);
textBlock.ToolTip = MapLocalizer.GetString(MapStringId.Options);
}
var image = new Image
{
Source = item.layer.Icon ?? DefaultImageSource,
Width = textBlock.FontSize + 8,
Height = textBlock.FontSize + 8,
Margin = new Thickness(2),
VerticalAlignment = VerticalAlignment.Center
};
image.SetBinding(OpacityProperty, opacityBinding);
label.Content = image;
// Einfügen ins Grid
Grid.SetColumn(label, 0);
Grid.SetRow(label, item.index);
LayersStack.Children.Add(label);
Grid.SetColumn(textBlock, 1);
Grid.SetRow(textBlock, item.index);
LayersStack.Children.Add(textBlock);
var checkBox = new CheckBox
{
IsChecked = layers.IsVisible(item.layer),
Tag = item.layer.Name,
Margin = new Thickness(3),
VerticalAlignment = VerticalAlignment.Center,
ToolTip = MapLocalizer.GetString(MapStringId.Visibility)
};
checkBox.Checked += visibility_Checked;
checkBox.Unchecked += visibility_Unchecked;
Grid.SetColumn(checkBox, 2);
Grid.SetRow(checkBox, item.index);
LayersStack.Children.Add(checkBox);
var slider = new Slider {
Tag = item.layer.Name, Margin = new Thickness(3), Width = 40, Minimum = 0, Maximum = 100, VerticalAlignment = VerticalAlignment.Center
};
// store any slider (used for calculation of header items later on.
referenceSlider = slider;
slider.ValueChanged += slider_ValueChanged;
slider.Value = item.layer.Opacity * 100;
Grid.SetColumn(slider, 4);
Grid.SetRow(slider, item.index);
LayersStack.Children.Add(slider);
if (!(item.layer is ILayerGeoSearch))
{
continue; // IsChecked = null for the existence of an exclusive selectable layer
}
// and this layer itself is not exclusive selectable.
checkBox = new CheckBox
{
IsChecked = true,
Tag = item.layer.Name,
Margin = new Thickness(3),
VerticalAlignment = VerticalAlignment.Center
};
// checkBox.IsThreeState = true; // By clicking it can be iterated through all three states.
checkBox.Checked += selection_Checked;
checkBox.Unchecked += selection_Unchecked;
checkBox.MouseRightButtonUp += selection_Exclusive;
checkBox.ToolTip = MapLocalizer.GetString(MapStringId.Selectability);
Grid.SetColumn(checkBox, selectionColumn);
Grid.SetRow(checkBox, item.index);
LayersStack.Children.Add(checkBox);
}
UpdateSelection();
}