添加项目文件。

MetroGauges/Controls/DrawTools/TextTool.cs

@@ -0,0 +1,119 @@
+using MetroGauges.Controls.DrawTools;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace MetroGauges.Controls
+{
+    public class TextTool : DrawToolBase
+    {
+        TextBox textBox;
+        
+        System.Timers.Timer timer = new System.Timers.Timer();
+        public TextTool(DesignControl canvas) : base(canvas)
+        {
+            IsStartDraw = true;
+        }
+
+        public override void MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            if (IsStartDraw)
+            {
+                Point mousePosition = Mouse.GetPosition(this.DrawDesign.canvasDesign);
+
+                if (!this.DrawDesign.canvasDesign.Children.Contains(textBox))
+                {
+                    textBox = new TextBox();
+                    textBox.Foreground= new SolidColorBrush(Colors.White);
+                    textBox.KeyDown += TextBox_KeyDown;
+                    this.DrawDesign.canvasDesign.Children.Add(textBox);
+                    timer.Elapsed += Timer_Elapsed;
+                }
+
+                //添加文本到画布
+                if(!string.IsNullOrWhiteSpace(textBox.Text))
+                {
+                    Point point = (Point)textBox.DataContext;
+                    TextBlock textBlock = new TextBlock();
+                    textBlock.Text = textBox.Text;
+                    textBlock.Foreground = new SolidColorBrush(Colors.White);
+                    Canvas.SetLeft(textBlock, point.X+2);
+                    Canvas.SetTop(textBlock, point.Y+6);
+
+                    textBlock.DataContext = point;
+                    this.AddShap(textBlock);
+                    textBox.Text = "";
+
+                }
+                timer.Interval = 300;
+                timer.Start();
+                Canvas.SetLeft(textBox, mousePosition.X);
+                Canvas.SetTop(textBox, mousePosition.Y);
+                textBox.DataContext = new Point() { X = mousePosition.X, Y = mousePosition.Y };
+
+                if (e == null)
+                {
+                    MouseRightButtonUp(sender, e);
+                }
+            }
+        }
+
+        private void TextBox_KeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Enter)
+            {
+                MouseLeftButtonDown(sender, null);
+            }
+        }
+
+        
+
+        public override void Highlight(FrameworkElement shape)
+        {
+            this.DrawDesign.CrrentDrawTool = this;
+            base.Highlight(shape);
+        }
+
+        private void Timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
+        {
+            this.DrawDesign.Dispatcher.Invoke(new Action(() => { textBox.Focus(); }));
+            timer.Stop();
+        }
+
+        public override void MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
+        {
+            
+        }
+
+        public override void MouseMove(object sender, MouseEventArgs e)
+        {
+            
+        }
+
+        public override void MouseRightButtonUp(object sender, MouseButtonEventArgs e)
+        {
+            IsStartDraw = false;
+            this.DrawDesign.canvasDesign.Children.Remove(textBox);
+
+            //textBox.Focus();
+        }
+
+        public override void m_Root_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            
+        }
+
+        public override void Deactivated()
+        {
+            IsStartDraw = false;
+            this.DrawDesign.canvasDesign.Children.Remove(textBox);
+        }
+    }
+}