private void OnPieSliceClicked(object sender, ChartDataValue e)
{
if (e.UserData is CategoryData data)
{
Selection = data;
}
}
private UIElement OnGenerateTip(ChartDataValue value)
{
var tip = new StackPanel()
{
Orientation = Orientation.Vertical
};
tip.Children.Add(new TextBlock()
{
Text = value.Label, FontWeight = FontWeights.Bold
});
tip.Children.Add(new TextBlock()
{
Text = value.Value.ToString("C0")
});
return(tip);
}
private void AddRow(int index, ChartDataValue dv)
{
Row ui = null;
if (LegendGrid.RowDefinitions.Count <= index)
{
LegendGrid.RowDefinitions.Add(new RowDefinition()
{
Height = new GridLength(1, GridUnitType.Auto)
});
}
if (this.elements.Count > index)
{
// reuse previous elements!
ui = this.elements[index];
}
else
{
ui = new Row();
if (dv.Color.HasValue)
{
var c = dv.Color.Value;
ToggleButton colorSwatch = new ToggleButton();
colorSwatch.Template = swatchTemplate;
colorSwatch.Margin = new Thickness(2);
colorSwatch.Width = 16;
colorSwatch.Height = 16;
colorSwatch.DataContext = dv;
ui.button = colorSwatch;
}
TextBlock label = new TextBlock()
{
Text = dv.Label, Margin = new Thickness(5, 2, 5, 2)
};
ui.label = label;
TextBlock total = new TextBlock()
{
Text = dv.Value.ToString("C0"), Margin = new Thickness(5, 2, 5, 2), HorizontalAlignment = HorizontalAlignment.Right
};
ui.value = total;
this.elements.Add(ui);
}
ui.item = dv;
if (ui.button != null)
{
var c = dv.Color.Value;
HlsColor hls = new HlsColor(c);
ui.button.Background = new SolidColorBrush(c);
if (hls.Luminance < 0.5)
{
ui.button.Foreground = Brushes.White;
}
else
{
ui.button.Foreground = Brushes.Black;
}
ui.button.DataContext = dv;
Grid.SetRow(ui.button, index);
Grid.SetColumn(ui.button, 0);
LegendGrid.Children.Add(ui.button);
ui.button.Checked -= OnColorSwatchToggled;
ui.button.Unchecked -= OnColorSwatchToggled;
ui.button.IsChecked = dv.Hidden;
ui.button.Checked += OnColorSwatchToggled;
ui.button.Unchecked += OnColorSwatchToggled;
}
ui.label.Text = dv.Label;
Grid.SetRow(ui.label, index);
Grid.SetColumn(ui.label, 1);
LegendGrid.Children.Add(ui.label);
ui.value.Text = dv.Value.ToString("C0");
Grid.SetRow(ui.value, index);
Grid.SetColumn(ui.value, 2);
LegendGrid.Children.Add(ui.value);
}
private void OnLegendToggled(object sender, ChartDataValue e)
{
// filtering out a category.
FilterChartData();
}
private void OnPieSliceHovered(object sender, ChartDataValue e)
{
}
