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- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using System.Windows;
- using System.Windows.Controls;
- using System.Windows.Ink;
- using System.Windows.Input;
- using System.Windows.Media;
-
- namespace Common.system
- {
- internal enum ZPenType : byte
- {
- Pen = 1,
- Erase = 2
- };
-
- internal class ZBBPage
- {
- public List<ZBBPageStep> lines { get; set; }
- public List<ZBBPageStep> lines_histoty { get; set; }
-
- public ZBBPage()
- {
- lines = new List<ZBBPageStep>();
- lines_histoty = new List<ZBBPageStep>();
- }
- }
-
- internal class ZBBPageStep
- {
- public StrokeCollection lines_curr { get; set; }
- public StrokeCollection lines_add { get; set; }
- public StrokeCollection lines_remove { get; set; }
-
- public ZBBPageStep()
- {
- lines_curr = new StrokeCollection();
- lines_add = new StrokeCollection();
- lines_remove = new StrokeCollection();
- }
- }
- public class BlackboardNew
- {
- private InkCanvas m_canvas;
-
- //private ZPenType type = ZPenType.Pen;
- private int pagenum = 0;
-
- private readonly int erasesize = 64;
- private readonly int pensize = 3;
- private int undoOrRedo = 0; //是否在进行撤销恢复操作
- private Color pencolor;
-
- private readonly List<ZBBPage> strokes_page_all = new List<ZBBPage>();
-
- // 添加这个变量是因为在用橡皮擦时 一次操作会触发多次StrokesChanged回掉 这里是把多次回掉合并在一起
- private ZBBPageStep step = null;
-
- public BlackboardNew(InkCanvas canvas)
- {
- init(canvas, Colors.White);
- }
-
- public BlackboardNew(InkCanvas canvas, Color _pencolor)
- {
- init(canvas, _pencolor);
- }
-
- private void init(InkCanvas canvas, Color _pencolor)
- {
- m_canvas = canvas;
- pencolor = _pencolor;
- ZBBPage page = new ZBBPage();
- page.lines.Add(new ZBBPageStep());
- strokes_page_all.Add(page);
- if (canvas != null)
- {
- canvas.EditingMode = InkCanvasEditingMode.Ink;
- DrawingAttributes drawingAttributes = new DrawingAttributes();
- canvas.DefaultDrawingAttributes = drawingAttributes;
- drawingAttributes.Width = pensize;
- drawingAttributes.Height = pensize;
- drawingAttributes.Color = pencolor;
- drawingAttributes.FitToCurve = true;
- drawingAttributes.IgnorePressure = false;
- canvas.Strokes.StrokesChanged += Strokes_StrokesChanged;
- canvas.StrokeCollected += Canvas_StrokeCollected;
- canvas.StrokeErasing += Canvas_StrokeErasing;
- canvas.StrokeErased += Canvas_StrokeErased;
- canvas.MouseUp += Canvas_MouseUp;
- }
- }
-
- private void Canvas_StrokeErasing(object sender, InkCanvasStrokeErasingEventArgs e)
- {
- undoOrRedo = 0;
- }
-
- private void Canvas_StrokeErased(object sender, RoutedEventArgs e)
- {
- }
-
- private void Canvas_StrokeCollected(object sender, InkCanvasStrokeCollectedEventArgs e)
- {
- }
-
- private void Canvas_MouseUp(object sender, MouseButtonEventArgs e)
- {
- if (step != null)
- {
- ZBBPage page = strokes_page_all[pagenum];
- if (page != null)
- {
- step.lines_curr.Add(m_canvas.Strokes);
- page.lines.Add(step);
- step = null;
- }
- }
- }
-
- private void Strokes_StrokesChanged(object sender, StrokeCollectionChangedEventArgs e)
- {
- if (undoOrRedo > 0)
- {
- undoOrRedo -= 1;
- return;
- }
-
- if (step == null)
- {
- step = new ZBBPageStep();
- }
-
- // 笔模式
- if (e.Added.Count > 0 && e.Removed.Count == 0)
- {
- step.lines_add.Add(e.Added);
- }
- // 橡皮模式 会多次进入回掉
- else if (e.Removed.Count > 0)
- {
- step.lines_add.Add(e.Added);
- for (int i = 0; i < e.Removed.Count; i++)
- {
- Stroke removeItem = e.Removed[i];
- if (step.lines_add.Contains(removeItem))
- {
- step.lines_add.Remove(removeItem);
- }
- else
- {
- step.lines_remove.Add(removeItem);
- }
- }
- }
- }
-
- // public方法 笔
- public void change_pen()
- {
- //this.type = ZPenType.Pen;
- DrawingAttributes drawingAttributes = new DrawingAttributes();
- m_canvas.DefaultDrawingAttributes = drawingAttributes;
- drawingAttributes.Color = pencolor;
- drawingAttributes.Width = pensize;
- drawingAttributes.Height = pensize;
- drawingAttributes.FitToCurve = true;
- drawingAttributes.IgnorePressure = false;
- m_canvas.EditingMode = InkCanvasEditingMode.Ink;
- }
-
- // 橡皮
- public void change_erase()
- {
- //this.type = ZPenType.Erase;
- m_canvas.EditingMode = InkCanvasEditingMode.EraseByPoint;
- m_canvas.EraserShape = new EllipseStylusShape(erasesize, erasesize, 0);
- }
-
- // 撤销
- public void undo()
- {
- ZBBPage page = strokes_page_all[pagenum];
-
- if (page != null && m_canvas.Strokes.Count > 0 && page.lines.Count > 1)
- {
- ZBBPageStep last = page.lines.Last();
- page.lines.Remove(last);
- page.lines_histoty.Add(last);
- if (page.lines.Last().lines_curr.Count > 0)
- {
- undoOrRedo = 2;
- }
- else
- {
- undoOrRedo = 1;
- }
-
- m_canvas.Strokes.Clear();
- m_canvas.Strokes.Add(page.lines.Last().lines_curr);
- }
- }
-
- // 恢复
- public void redo()
- {
- ZBBPage page = strokes_page_all[pagenum];
- if (page != null && page.lines_histoty.Count > 0)
- {
- ZBBPageStep line = page.lines_histoty[page.lines_histoty.Count - 1];
-
- page.lines.Add(line);
- page.lines_histoty.Remove(line);
- if (page.lines.Last().lines_curr.Count > 0)
- {
- undoOrRedo = 2;
- }
- else
- {
- undoOrRedo = 1;
- }
- m_canvas.Strokes.Clear();
- m_canvas.Strokes.Add(page.lines.Last().lines_curr);
- }
- }
-
- // 清空
- public void clear()
- {
- ZBBPage page = strokes_page_all[pagenum];
- if (page != null)
- {
- m_canvas.Strokes.Clear();
- page.lines_histoty.Clear();
- page.lines.Clear();
- page.lines.Add(new ZBBPageStep());
- }
- }
-
- public void changepage(int mpagenum)
- {
- if (pagenum != mpagenum)
- {
- pagenum = mpagenum;
- if (pagenum >= strokes_page_all.Count)
- {
- int numadd = pagenum - strokes_page_all.Count + 1;
- for (int i = 0; i < numadd; i++)
- {
- ZBBPage pagetemp = new ZBBPage();
- pagetemp.lines.Add(new ZBBPageStep());
- strokes_page_all.Add(pagetemp);
- }
- }
-
- ZBBPage page = strokes_page_all[pagenum];
- if (page != null)
- {
- if (page.lines.Last().lines_curr.Count > 0)
- {
- undoOrRedo += 1;
- }
- if (m_canvas.Strokes.Count > 0)
- {
- undoOrRedo += 1;
- m_canvas.Strokes.Clear();
- }
-
- m_canvas.Strokes.Add(page.lines.Last().lines_curr);
- //StylusPoints stylusPoints = new StylusPoints();
- //stylusPoints.Add();
- //m_canvas.Strokes[0].StylusPoints.Add();
- StrokeCollection strokes = new StrokeCollection();
- StylusPointCollection stylusPoints = new StylusPointCollection();
- //stylusPoints.
- //Stroke stroke = new Stroke();
- System.Windows.Input.StylusPointDescription stylusPointDescription = new StylusPointDescription();
- StylusPoint stylusPoint = new StylusPoint();
- stylusPoint.X = 580;
- stylusPoint.Y = 212;
- stylusPoints.Add(stylusPoint);
- Stroke stroke = new Stroke(stylusPoints);
-
- stylusPoint.X = 581;
- stylusPoint.Y = 213;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
-
- stylusPoint.X = 586;
- stylusPoint.Y = 214;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
-
- stylusPoint.X = 599;
- stylusPoint.Y = 214;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
- stylusPoint.X = 623;
- stylusPoint.Y = 214;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
-
- stylusPoint.X = 663;
- stylusPoint.Y = 214;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
- stylusPoint.X = 963;
- stylusPoint.Y = 214;
- stylusPoints.Add(stylusPoint);
- stroke = new Stroke(stylusPoints);
- //page.lines.Last().lines_curr.Add();
-
- m_canvas.Strokes.Add(stroke);
- }
- }
- }
- }
- }
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