From 3ef7434f5bef23c5c53db26ce2ff121e65936e19 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=89=BE=E7=AB=B9?= <akwkevin@126.com>
Date: Tue, 14 Feb 2023 22:15:19 +0800
Subject: [PATCH] =?UTF-8?q?ZoomBox=20=E5=AE=8C=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml |  8 ++-
 .../Controls/ZoomBox.cs                       | 60 ++++++++++++++-----
 .../Styles/ZoomBox.xaml                       |  4 +-
 .../UserControls/DiagramControl.xaml.cs       |  2 +-
 .../BaseViewModel/DiagramViewModel.cs         | 28 +++++++++
 .../ViewModels/IDiagramViewModel.cs           |  8 +++
 6 files changed, 88 insertions(+), 22 deletions(-)

diff --git a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
index 435b29d..8940371 100644
--- a/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
+++ b/AIStudio.Wpf.DiagramApp/Views/MainWindow.xaml
@@ -1900,7 +1900,9 @@
                                                Width="180"
                                                HorizontalAlignment="Right"
                                                VerticalAlignment="Bottom"
-                                               ScrollViewer="{Binding ElementName=designerScrollViewer}"
+                                               DesignerCanvas="{Binding ElementName=diagram}"
+                                               MaximumZoomValue="{Binding MaximumZoomValue,Mode=TwoWay}"  
+                                               MinimumZoomValue="{Binding MinimumZoomValue,Mode=TwoWay}"  
                                                ZoomValue="{Binding ZoomValue,Mode=TwoWay}"   
                                                Margin="0,0,5,5" />
                                         </Grid>
@@ -2062,9 +2064,9 @@
             <Fluent:StatusBarItem Title="Zoom Slider"
                                   HorizontalAlignment="Right">
                 <Slider x:Name="zoomSlider"
-                        Minimum="0.5"
+                        Minimum="{Binding PageViewModel.DiagramViewModel.MinimumZoomValue}"
                         Value="{Binding PageViewModel.DiagramViewModel.ZoomValue}"
-                        Maximum="2.0"
+                        Maximum="{Binding PageViewModel.DiagramViewModel.MaximumZoomValue}"
                         IsDirectionReversed="False"
                         Style="{DynamicResource ZoomSliderStyle}"
                         IsSnapToTickEnabled="True"
diff --git a/AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs b/AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs
index a905ed2..05c5902 100644
--- a/AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs
+++ b/AIStudio.Wpf.DiagramDesigner/Controls/ZoomBox.cs
@@ -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;
diff --git a/AIStudio.Wpf.DiagramDesigner/Styles/ZoomBox.xaml b/AIStudio.Wpf.DiagramDesigner/Styles/ZoomBox.xaml
index 8c87a02..58058f2 100644
--- a/AIStudio.Wpf.DiagramDesigner/Styles/ZoomBox.xaml
+++ b/AIStudio.Wpf.DiagramDesigner/Styles/ZoomBox.xaml
@@ -210,8 +210,8 @@
                                     </Grid.ColumnDefinitions>
                                     <Slider Name="PART_ZoomSlider"
                                             Ticks="0.25,0.50,0.75,1,1.25,1.50,2.00,3.00,4.00,5.00"
-                                            Minimum="0.25"
-                                            Maximum="5"
+                                            Minimum="{Binding MinimumZoomValue,RelativeSource={RelativeSource Mode=TemplatedParent},Mode=TwoWay}" 
+                                            Maximum="{Binding MaximumZoomValue,RelativeSource={RelativeSource Mode=TemplatedParent},Mode=TwoWay}" 
                                             SmallChange="0.25"
                                             LargeChange="0.25"
                                             Value="{Binding ZoomValue,RelativeSource={RelativeSource Mode=TemplatedParent},Mode=TwoWay}"                                      
diff --git a/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml.cs b/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml.cs
index a10f671..ed76903 100644
--- a/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml.cs
+++ b/AIStudio.Wpf.DiagramDesigner/UserControls/DiagramControl.xaml.cs
@@ -102,7 +102,7 @@ namespace AIStudio.Wpf.DiagramDesigner
 
             var newZoomValue = DiagramViewModel.ZoomValue + (e.Delta > 0 ? 0.1 : -0.1);
 
-            DiagramViewModel.ZoomValue = Math.Max(Math.Min(newZoomValue, 10), 0.5);
+            DiagramViewModel.ZoomValue = Math.Max(Math.Min(newZoomValue, DiagramViewModel.MaximumZoomValue), DiagramViewModel.MinimumZoomValue);
 
             e.Handled = true;
         }
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
index 6aedb00..425656d 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/BaseViewModel/DiagramViewModel.cs
@@ -400,6 +400,34 @@ namespace AIStudio.Wpf.DiagramDesigner
             }
         }
 
+        private double _maximumZoomValue = 3;
+        [Browsable(false)]
+        public double MaximumZoomValue
+        {
+            get
+            {
+                return _maximumZoomValue;
+            }
+            set
+            {
+                SetProperty(ref _maximumZoomValue, value);
+            }
+        }
+
+        private double _minimumZoomValue = 0.5;
+        [Browsable(false)]
+        public double MinimumZoomValue
+        {
+            get
+            {
+                return _minimumZoomValue;
+            }
+            set
+            {
+                SetProperty(ref _minimumZoomValue, value);
+            }
+        }
+
         private double _delayZoomValue = 1;
         [Browsable(false)]
         public double DelayZoomValue
diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
index 31b3c4b..1ef133f 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/IDiagramViewModel.cs
@@ -257,6 +257,14 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             get; set;
         }
+        double MaximumZoomValue
+        {
+            get; set;
+        }
+        double MinimumZoomValue
+        {
+            get; set;
+        }
         bool AllowDrop
         {
             get; set;