Python editor text zoom (#13427)

Amoursol · QilongTang · web-flow · commit bb2b6728209d · 2022-10-25T13:55:18.000-07:00
* Adding in local changes

* Event trigger

* Clean-up

* update

Co-authored-by: Aaron (Qilong) &lt;aaron.tang@autodesk.com&gt;
diff --git a/src/DynamoSandbox/Properties/Settings.Designer.cs b/src/DynamoSandbox/Properties/Settings.Designer.cs
diff --git a/src/Libraries/PythonNodeModelsWpf/ScriptEditorWindow.xaml b/src/Libraries/PythonNodeModelsWpf/ScriptEditorWindow.xaml
@@ -1,4 +1,4 @@
-﻿<dww:ModelessChildWindow x:Class="PythonNodeModelsWpf.ScriptEditorWindow"
+<dww:ModelessChildWindow x:Class="PythonNodeModelsWpf.ScriptEditorWindow"
                          xmlns="https://schemas.microsoft.com/winfx/2006/xaml/presentation"
                          xmlns:fa="https://schemas.fontawesome.io/icons/"
                          xmlns:x="https://schemas.microsoft.com/winfx/2006/xaml"
@@ -75,7 +75,8 @@
                                    ShowLineNumbers="True"
                                    Background="#272822"
                                    Foreground="#F8F8F2"
-                                   HorizontalScrollBarVisibility="Disabled"/>
+                                   HorizontalScrollBarVisibility="Disabled"
+                                   PreviewMouseWheel="EditorBox_PreviewMouseWheel"/>
         </Border>
 
         <StackPanel Orientation="Horizontal"
diff --git a/src/Libraries/PythonNodeModelsWpf/ScriptEditorWindow.xaml.cs b/src/Libraries/PythonNodeModelsWpf/ScriptEditorWindow.xaml.cs
@@ -1,4 +1,4 @@
-﻿using System;
+using System;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.Windows;
@@ -105,6 +105,47 @@ internal void Initialize(Guid workspaceGuid, Guid nodeGuid, string propName, str
             CachedEngine = nodeModel.EngineName;
             EngineSelectorComboBox.SelectedItem = CachedEngine;
         }
+
+        #region Text Zoom in Python Editor
+        // React to ctrl + mouse wheel to zoom in and out
+        private void EditorBox_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
+        {
+            bool ctrl = Keyboard.Modifiers == ModifierKeys.Control;
+            if (ctrl)
+            {
+                this.UpdateFontSize(e.Delta > 0);
+                e.Handled = true;
+            }
+        }
+
+        // Reasonable max and min font size values
+        private const double FONT_MAX_SIZE = 60d;
+        private const double FONT_MIN_SIZE = 5d;
+
+        // Update function, increases/decreases by a specific increment
+        public void UpdateFontSize(bool increase)
+        {
+            double currentSize = editText.FontSize;
+
+            if (increase)
+            {
+                if (currentSize < FONT_MAX_SIZE)
+                {
+                    double newSize = Math.Min(FONT_MAX_SIZE, currentSize + 1);
+                    editText.FontSize = newSize;
+                }
+            }
+            else
+            {
+                if (currentSize > FONT_MIN_SIZE)
+                {
+                    double newSize = Math.Max(FONT_MIN_SIZE, currentSize - 1);
+                    editText.FontSize = newSize;
+                }
+            }
+        }
+        #endregion
+
         #region Autocomplete Event Handlers
 
         private void UpdateAvailableEngines(object sender = null, NotifyCollectionChangedEventArgs e = null)
