feat: finish color picker

HFUTCourseSimulation/Widget/ColorPicker.xaml

@@ -41,7 +41,7 @@
 
         <TabControl Grid.Row="1" Margin="5">
             <TabItem Header="Material Design" Padding="5">
-                <WrapPanel Orientation="Horizontal">
+                <WrapPanel x:Name="uiMdColorPresetList" Orientation="Horizontal">
                     
                 </WrapPanel>
             </TabItem>

HFUTCourseSimulation/Widget/ColorPicker.xaml.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows;
@@ -25,8 +26,11 @@ namespace HFUTCourseSimulation.Widget {
         private Color _foregroundBackup, _backgroundBackup;
 
         private void uiMainWindow_Loaded(object sender, RoutedEventArgs e) {
-            // Set context and backup color for restoring
+            // Build color list
+            BuildColorList();
+            // Set context
             uiPicker.DataContext = CurrentColor;
+            // Backup color for restoring
             _foregroundBackup = CurrentColor.Foreground;
             _backgroundBackup = CurrentColor.Background;
         }
@@ -35,6 +39,78 @@ namespace HFUTCourseSimulation.Widget {
             uiPicker.DataContext = null;
         }
 
+        #region Color Box Stuff
+
+        private Border CreateColorBox(Util.ColorPair c, string name) {
+            var colorBox = new Border();
+            colorBox.Width = 100;
+            colorBox.Height = 100;
+            colorBox.Background = new SolidColorBrush(c.Background);
+            colorBox.BorderBrush = new SolidColorBrush(Colors.Black);
+            colorBox.BorderThickness = new Thickness(1);
+            colorBox.CornerRadius = new CornerRadius(5);
+            colorBox.Margin = new Thickness(5);
+            colorBox.Cursor = Cursors.Hand;
+
+            var colorText = new TextBlock();
+            colorText.Text = name;
+            colorText.Foreground = new SolidColorBrush(c.Foreground);
+            colorText.HorizontalAlignment = HorizontalAlignment.Center;
+            colorText.VerticalAlignment = VerticalAlignment.Center;
+            colorBox.Child = colorText;
+
+            return colorBox;
+        }
+
+        private class ColorPropertyWrapper {
+            public ColorPropertyWrapper(PropertyInfo prop) {
+                _prop = prop;
+            }
+
+            public string GetName() => _prop.Name;
+            public Util.ColorPair GetColor() {
+                var value = _prop.GetValue(null);
+                if (value is Util.ColorPair color) {
+                    return color;
+                } else {
+                    return new Util.ColorPair();
+                }
+            }
+
+            private PropertyInfo _prop;
+        }
+
+        private IEnumerable<ColorPropertyWrapper> FilterColorProperties(Type t) {
+            return t.GetProperties(BindingFlags.Public | BindingFlags.Static)
+                .Where((prop) => prop.PropertyType == typeof(Util.ColorPair))
+                .Select((prop) => new ColorPropertyWrapper(prop));
+        }
+
+        private Dictionary<object, Util.ColorPair> _knownColorPresets = new Dictionary<object, Util.ColorPair>();
+
+        private void BuildColorList() {
+            _knownColorPresets .Clear();
+
+            uiMdColorPresetList.Children.Clear();
+            foreach (var prop in FilterColorProperties(typeof(Util.ColorPreset.MdColors))) {
+                var box = CreateColorBox(prop.GetColor(), prop.GetName());
+                box.MouseDown += ColorBox_Click;
+                uiMdColorPresetList.Children.Add(box);
+                _knownColorPresets.Add(box, prop.GetColor());
+            }
+        }
+
+        private void ColorBox_Click(object sender, MouseButtonEventArgs e) {
+            if (_knownColorPresets.TryGetValue(sender, out var value)) {
+                CurrentColor.Foreground = value.Foreground;
+                CurrentColor.Background = value.Background;
+            }
+        }
+
+        #endregion
+
+        #region Ui Handlers
+
         private void uiForegroundPicker_MouseDown(object sender, MouseButtonEventArgs e) {
             var color = Util.Win32Dialog.PickColor();
             if (color is null) return;
@@ -56,5 +132,8 @@ namespace HFUTCourseSimulation.Widget {
             CurrentColor.Background = _backgroundBackup;
             this.Close();
         }
+
+        #endregion
+
     }
 }