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ZoomBox 完成

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艾竹
2023-02-14 22:15:19 +08:00
parent 38cb0fae85
commit 3ef7434f5b
6 changed files with 88 additions and 22 deletions
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60
AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs
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@@ -13,7 +13,6 @@ namespace AIStudio.Wpf.DiagramDesigner
private Thumb zoomThumb;
private Canvas zoomCanvas;
private Slider zoomSlider;
private DiagramControl diagramControl;
#region DPs
@@ -34,20 +33,20 @@ namespace AIStudio.Wpf.DiagramDesigner
DependencyProperty.Register(nameof(ScrollViewer), typeof(ScrollViewer), typeof(ZoomBox));
#endregion
#region DesignerCanvas
#region FrameworkElement
public static readonly DependencyProperty DesignerCanvasProperty =
DependencyProperty.Register(nameof(DesignerCanvas), typeof(DesignerCanvas), typeof(ZoomBox),
DependencyProperty.Register(nameof(DesignerCanvas), typeof(FrameworkElement), typeof(ZoomBox),
new FrameworkPropertyMetadata(null,
new PropertyChangedCallback(OnDesignerCanvasChanged)));
public DesignerCanvas DesignerCanvas
public FrameworkElement DesignerCanvas
{
get
{
return (DesignerCanvas)GetValue(DesignerCanvasProperty);
return (FrameworkElement)GetValue(DesignerCanvasProperty);
}
set
{
@@ -55,17 +54,16 @@ namespace AIStudio.Wpf.DiagramDesigner
}
}
private static void OnDesignerCanvasChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ZoomBox target = (ZoomBox)d;
DesignerCanvas oldDesignerCanvas = (DesignerCanvas)e.OldValue;
DesignerCanvas newDesignerCanvas = (DesignerCanvas)e.NewValue;
FrameworkElement oldDesignerCanvas = (FrameworkElement)e.OldValue;
FrameworkElement newDesignerCanvas = (FrameworkElement)e.NewValue;
target.OnDesignerCanvasChanged(oldDesignerCanvas, newDesignerCanvas);
}
protected virtual void OnDesignerCanvasChanged(DesignerCanvas oldDesignerCanvas, DesignerCanvas newDesignerCanvas)
protected virtual void OnDesignerCanvasChanged(FrameworkElement oldDesignerCanvas, FrameworkElement newDesignerCanvas)
{
if (oldDesignerCanvas != null)
{
@@ -96,19 +94,43 @@ namespace AIStudio.Wpf.DiagramDesigner
}
}
public static readonly DependencyProperty MaximumZoomValueProperty =
DependencyProperty.Register(nameof(MaximumZoomValue), typeof(double), typeof(ZoomBox), new UIPropertyMetadata(3d));
public double MaximumZoomValue
{
get
{
return (double)GetValue(MaximumZoomValueProperty);
}
set
{
SetValue(MaximumZoomValueProperty, value);
}
}
public static readonly DependencyProperty MinimumZoomValueProperty =
DependencyProperty.Register(nameof(MinimumZoomValue), typeof(double), typeof(ZoomBox), new UIPropertyMetadata(0.5d));
public double MinimumZoomValue
{
get
{
return (double)GetValue(MinimumZoomValueProperty);
}
set
{
SetValue(MinimumZoomValueProperty, value);
}
}
#endregion
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.ScrollViewer = VisualHelper.TryFindParent<ScrollViewer>(this.DesignerCanvas);
if (this.ScrollViewer == null)
return;
DesignerCanvas = VisualHelper.FindChild<DesignerCanvas>(this.ScrollViewer);
diagramControl = VisualHelper.FindChild<DiagramControl>(this.ScrollViewer);
this.zoomThumb = Template.FindName("PART_ZoomThumb", this) as Thumb;
if (this.zoomThumb == null)
throw new Exception("PART_ZoomThumb template is missing!");
@@ -162,6 +184,12 @@ namespace AIStudio.Wpf.DiagramDesigner
private void DesignerCanvas_MouseWheel(object sender, EventArgs e)
{
if (Keyboard.IsKeyDown(Key.LeftCtrl) == false
&& Keyboard.IsKeyDown(Key.RightCtrl) == false)
{
return;
}
MouseWheelEventArgs wheel = (MouseWheelEventArgs)e;
//divide the value by 10 so that it is more smooth
@@ -172,9 +200,9 @@ namespace AIStudio.Wpf.DiagramDesigner
private void InvalidateScale(out double scale, out double xOffset, out double yOffset)
{
Vector vector = System.Windows.Media.VisualTreeHelper.GetOffset(diagramControl);
double w = DesignerCanvas.ActualWidth * ZoomValue + vector.X * 2;
double h = DesignerCanvas.ActualHeight * ZoomValue + vector.Y * 2;
Vector vector = System.Windows.Media.VisualTreeHelper.GetOffset(DesignerCanvas);
double w = DesignerCanvas.ActualWidth + vector.X * 2;
double h = DesignerCanvas.ActualHeight + vector.Y * 2;
// zoom canvas size
double x = this.zoomCanvas.ActualWidth;