zhusenlin/aistudio-wpf-diagram
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ZoomBox待完成，还需要调整

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艾竹
2023-02-13 22:50:50 +08:00
parent 4d36eac218
commit dfe76438c2
9 changed files with 132 additions and 68 deletions
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49
AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs
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@@ -4,6 +4,7 @@ using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Media;
using System.Windows.Input;
using AIStudio.Wpf.DiagramDesigner.Helpers;
namespace AIStudio.Wpf.DiagramDesigner
{
@@ -12,7 +13,6 @@ namespace AIStudio.Wpf.DiagramDesigner
private Thumb zoomThumb;
private Canvas zoomCanvas;
private Slider zoomSlider;
private ScaleTransform scaleTransform;
#region DPs
@@ -24,7 +24,24 @@ namespace AIStudio.Wpf.DiagramDesigner
}
public static readonly DependencyProperty ScrollViewerProperty =
DependencyProperty.Register(nameof(ScrollViewer), typeof(ScrollViewer), typeof(ZoomBox));
DependencyProperty.Register(nameof(ScrollViewer), typeof(ScrollViewer), typeof(ZoomBox), new FrameworkPropertyMetadata(null,
new PropertyChangedCallback(OnScrollViewerChanged)));
private static void OnScrollViewerChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ZoomBox target = (ZoomBox)d;
ScrollViewer oldvalue = (ScrollViewer)e.OldValue;
ScrollViewer newvalue = (ScrollViewer)e.NewValue;
target.OnScrollViewerChanged(oldvalue, newvalue);
}
protected virtual void OnScrollViewerChanged(ScrollViewer oldvalue, ScrollViewer newvalue)
{
if (newvalue != null)
{
DesignerCanvas = VisualHelper.FindChild<DesignerCanvas>(newvalue);
}
}
#endregion
#region DesignerCanvas
@@ -56,20 +73,33 @@ namespace AIStudio.Wpf.DiagramDesigner
{
if (oldDesignerCanvas != null)
{
newDesignerCanvas.LayoutUpdated -= new EventHandler(this.DesignerCanvas_LayoutUpdated);
newDesignerCanvas.MouseWheel -= new MouseWheelEventHandler(this.DesignerCanvas_MouseWheel);
oldDesignerCanvas.LayoutUpdated -= new EventHandler(this.DesignerCanvas_LayoutUpdated);
oldDesignerCanvas.MouseWheel -= new MouseWheelEventHandler(this.DesignerCanvas_MouseWheel);
}
if (newDesignerCanvas != null)
{
newDesignerCanvas.LayoutUpdated += new EventHandler(this.DesignerCanvas_LayoutUpdated);
newDesignerCanvas.MouseWheel += new MouseWheelEventHandler(this.DesignerCanvas_MouseWheel);
newDesignerCanvas.LayoutTransform = this.scaleTransform;
}
}
#endregion
public static readonly DependencyProperty ZoomValueProperty =
DependencyProperty.Register(nameof(ZoomValue), typeof(double), typeof(ZoomBox), new UIPropertyMetadata(1d));
public double ZoomValue
{
get
{
return (double)GetValue(ZoomValueProperty);
}
set
{
SetValue(ZoomValueProperty, value);
}
}
#endregion
public override void OnApplyTemplate()
@@ -79,6 +109,8 @@ namespace AIStudio.Wpf.DiagramDesigner
if (this.ScrollViewer == null)
return;
DesignerCanvas = VisualHelper.FindChild<DesignerCanvas>(this.ScrollViewer);
this.zoomThumb = Template.FindName("PART_ZoomThumb", this) as Thumb;
if (this.zoomThumb == null)
throw new Exception("PART_ZoomThumb template is missing!");
@@ -93,7 +125,6 @@ namespace AIStudio.Wpf.DiagramDesigner
this.zoomThumb.DragDelta += new DragDeltaEventHandler(this.Thumb_DragDelta);
this.zoomSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(this.ZoomSlider_ValueChanged);
this.scaleTransform = new ScaleTransform();
}
private void ZoomSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
@@ -103,8 +134,6 @@ namespace AIStudio.Wpf.DiagramDesigner
double newVerticalOffset = ((this.ScrollViewer.VerticalOffset + halfViewportHeight) * scale - halfViewportHeight);
double halfViewportWidth = this.ScrollViewer.ViewportWidth / 2;
double newHorizontalOffset = ((this.ScrollViewer.HorizontalOffset + halfViewportWidth) * scale - halfViewportWidth);
this.scaleTransform.ScaleX *= scale;
this.scaleTransform.ScaleY *= scale;
this.ScrollViewer.ScrollToHorizontalOffset(newHorizontalOffset);
this.ScrollViewer.ScrollToVerticalOffset(newVerticalOffset);
}
@@ -145,8 +174,8 @@ namespace AIStudio.Wpf.DiagramDesigner
private void InvalidateScale(out double scale, out double xOffset, out double yOffset)
{
double w = DesignerCanvas.ActualWidth * this.scaleTransform.ScaleX;
double h = DesignerCanvas.ActualHeight * this.scaleTransform.ScaleY;
double w = DesignerCanvas.ActualWidth * ZoomValue;
double h = DesignerCanvas.ActualHeight * ZoomValue;
// zoom canvas size
double x = this.zoomCanvas.ActualWidth;