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ShiJh
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Mar 5, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,160 @@ | ||
| using System; | ||
| using System.Collections; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using System.Windows; | ||
| using System.Windows.Input; | ||
| using System.Windows.Media; | ||
| using System.Windows.Shapes; | ||
|
|
||
| namespace WpfApp.View | ||
| { | ||
| public partial class ImgBox : Window | ||
| { | ||
| private void Pen_Click(object sender, RoutedEventArgs e) | ||
| { | ||
| if (!mode.Equals(Mode.Pen)) | ||
| { | ||
| ShutdownEraserMode(); | ||
| OpenPenMode(); | ||
| } | ||
| else | ||
| { | ||
| ShutdownPenMode(); | ||
| } | ||
|
|
||
| } | ||
|
|
||
| private void Eraser_Click(object sender, RoutedEventArgs e) | ||
| { | ||
| if (!mode.Equals(Mode.Eraser)) | ||
| { | ||
| ShutdownPenMode(); | ||
| OpenEraserMode(); | ||
| } | ||
| else | ||
| { | ||
| ShutdownEraserMode(); | ||
| } | ||
| } | ||
|
|
||
| private void OpenEraserMode() | ||
| { | ||
| mode = Mode.Eraser; | ||
| this.MouseLeftButtonDown += RemoveLine; | ||
| } | ||
|
|
||
| private void ShutdownEraserMode() | ||
| { | ||
| mode = Mode.Drag; | ||
| this.MouseLeftButtonDown -= RemoveLine; | ||
| } | ||
|
|
||
| private void RemoveLine(object sender, MouseButtonEventArgs e) | ||
| { | ||
| Point p = e.GetPosition(this); | ||
| IEnumerator ie = this.Panel.Children.GetEnumerator(); | ||
| Line cur = null; | ||
| double min = 10; | ||
| while (ie.MoveNext()) | ||
| { | ||
| var elem = ie.Current as Line; | ||
| double dis = GetDistance(p, elem); | ||
| if (dis < min) | ||
| { | ||
| cur = elem; | ||
| min = dis; | ||
| } | ||
| } | ||
| if(cur != null) | ||
| { | ||
| this.Panel.Children.Remove(cur); | ||
| } | ||
| } | ||
|
|
||
| private double GetDistance(Point p, Line l) | ||
| { | ||
| double k = (l.Y2 - l.Y1) / (l.X2 - l.X1); | ||
| double a = k; | ||
| double b = -1; | ||
| double c = l.Y1 - k * l.X1; | ||
| double fz = Math.Abs(a * p.X + b * p.Y + c); | ||
| double fm = Math.Sqrt(a * a + b * b); | ||
| return fz / fm; | ||
| } | ||
|
|
||
| private void OpenPenMode() | ||
| { | ||
| mode = Mode.Pen; | ||
| this.Cursor = Cursors.Pen; | ||
| this.MouseLeftButtonUp += StopDrawLine; | ||
| this.MouseLeftButtonDown += StartDrawLine; | ||
| this.MouseMove += DrawLine; | ||
| } | ||
|
|
||
| private void ShutdownPenMode() | ||
| { | ||
| mode = Mode.Drag; | ||
| this.Cursor = Cursors.Arrow; | ||
| this.MouseLeftButtonUp -= StopDrawLine; | ||
| this.MouseLeftButtonDown -= StartDrawLine; | ||
| this.MouseMove -= DrawLine; | ||
| } | ||
|
|
||
| private Line line; | ||
|
|
||
| private void StartDrawLine(object sender, MouseEventArgs e) | ||
| { | ||
| var p = e.GetPosition(this); | ||
| line = new Line(); | ||
| line.Stroke = new SolidColorBrush(Color.FromArgb(255, 255, 0, 0)); | ||
| line.StrokeThickness = 3; | ||
| line.X1 = p.X; | ||
| line.Y1 = p.Y; | ||
| this.Panel.Children.Add(line); | ||
| } | ||
|
|
||
| private void DrawLine(object sender, MouseEventArgs e) | ||
| { | ||
| if(e.LeftButton == MouseButtonState.Pressed) | ||
| { | ||
| Point p = e.GetPosition(this); | ||
| if (line != null) | ||
| { | ||
| line.X2 = p.X; | ||
| line.Y2 = p.Y; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private void StopDrawLine(object sender, MouseEventArgs e) | ||
| { | ||
| line = null; | ||
| } | ||
|
|
||
| private void Bar_MouseEnter(object sender, MouseEventArgs e) | ||
| { | ||
| this.Bar.Width = rw; | ||
| } | ||
|
|
||
| private void Bar_MouseLeave(object sender, MouseEventArgs e) | ||
| { | ||
| this.Bar.Width = 15; | ||
| } | ||
|
|
||
| private void Bar_KeyDown(object sender, KeyEventArgs e) | ||
| { | ||
| Console.WriteLine(e.Key); | ||
| if(e.Key.Equals(Key.Escape)) | ||
| { | ||
| if (!mode.Equals(Mode.Drag)) | ||
| { | ||
| ShutdownEraserMode(); | ||
| ShutdownPenMode(); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } |
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