AB4D Forum

There is no sample about Zoom mini map.

Zoom panel does not support Zoom mini map ?

In the current version of ZoomPanel there is no mini map included.
But it could be a nice feature - I have added it to my todo list and will implement it in the new version (cannot say when it will be available).

I have prepared a code to implement a simple mini map by yourself:

Code:
private void Page_Loaded(object sender, RoutedEventArgs e)

{

    ZoomPanel1.ZoomMode = Ab2d.Controls.ZoomPanel.ZoomModeType.Move;

    Canvas zoomPanelMiniMapCanvas;

    zoomPanelMiniMapCanvas = CreateMinimap(200);

    zoomPanelMiniMapCanvas.VerticalAlignment = VerticalAlignment.Center;

    zoomPanelMiniMapCanvas.HorizontalAlignment = HorizontalAlignment.Left;

    MainGrid.Children.Add(zoomPanelMiniMapCanvas);

}

private Canvas _zoomPanelMiniMapCanvas;

private Rectangle _zoomPanelMiniMapRectangle;

private Canvas CreateMinimap(int width)

{

    int height;

    Image zoomPanelImage;

    FrameworkElement content;

    content = ZoomPanel1.Content as FrameworkElement;

    if (content == null)

        return _zoomPanelMiniMapCanvas;

    // Adjust height for aspect ratio

    height = Convert.ToInt32(width * content.ActualHeight / content.ActualWidth);

    _zoomPanelMiniMapCanvas.Width = width;

    _zoomPanelMiniMapCanvas.Height = height;

    RenderTargetBitmap bmp = new RenderTargetBitmap(width, height, 96, 96 /* standard WPF dpi setting 96 */, PixelFormats.Pbgra32);

    bmp.Render(content);

    zoomPanelImage = new Image();

    zoomPanelImage.Source = bmp;

    _zoomPanelMiniMapRectangle = new Rectangle();

    _zoomPanelMiniMapRectangle.Stroke = Brushes.Red;

    _zoomPanelMiniMapCanvas.Children.Add(zoomPanelImage);

    _zoomPanelMiniMapCanvas.Children.Add(_zoomPanelMiniMapRectangle);

    UpdateMiniMapRectangle(ZoomPanel1.Viewbox);

    ZoomPanel1.ViewboxChanged += new Ab2d.Controls.ZoomPanel.ViewboxChangedRoutedEventHandler(ZoomPanel1_ViewboxChanged);

    return _zoomPanelMiniMapCanvas;

}

void ZoomPanel1_ViewboxChanged(object sender, Ab2d.Controls.ViewboxChangedRoutedEventArgs e)

{

    // NOTE that if ZoomPanel is animated, the ZoomPanel1.Viewbox is not yet changed to the final value because the animation is just started

    // The e.NewViewboxValue is already the final value

    UpdateMiniMapRectangle(e.NewViewboxValue);

}

private void UpdateMiniMapRectangle(Rect ZoomPanelviewbox)

{

    Canvas.SetLeft(_zoomPanelMiniMapRectangle, ZoomPanelviewbox.X * _zoomPanelMiniMapCanvas.Width);

    Canvas.SetTop(_zoomPanelMiniMapRectangle, ZoomPanelviewbox.Y * _zoomPanelMiniMapCanvas.Height);

    _zoomPanelMiniMapRectangle.Width = ZoomPanelviewbox.Width * _zoomPanelMiniMapCanvas.Width;

    _zoomPanelMiniMapRectangle.Height = ZoomPanelviewbox.Height * _zoomPanelMiniMapCanvas.Height;

}

(10-19-2009, 03:53 AM)hoyong Wrote: [ -> ]There is no sample about Zoom mini map.

Zoom panel does not support Zoom mini map ?

hoyong

abenedik