如何使用标志绘制或不绘制pictureBox绘画事件？

Question

我在Form1顶层有一个标志：addFrame在构造函数中设置为false。 然后在皮特事件中，我检查它是否让我画，如果它的真实也让我画。这里的问题是，我希望能够在第一次运行程序时进行绘制！ 但是，当我将trackBar移动到右侧时，我不想让它画任何东西。

private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e) 
     { 


      Graphics g = e.Graphics; 

      g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; 

       moveCounter++; 
       label6.Text = moveCounter.ToString(); 



        if (addFrame == false) 
        { 
         WireObjectGraphics.Draw(wireObject1, g); 
        } 
        else 
        { 
         addFrame = false; 
         WireObjectGraphics.Draw(wireObject1, g); 
        } 

     } 

这是按钮点击事件，其中IM点击设置ADDFRAME为true：

private void button16_Click(object sender, EventArgs e) 
    { 
     wireObjectAnimation1.AddFrame(); 
     addFrame = true; 
     trackBar1.Select(); 
    } 

而且在这种情况下，我想使滚动条事件，如果我的跟踪条移到没有任何绘画，然后只是在pictureBox中显示图像不要画任何东西！但是如果我把它移到右边，并且已经有绘制，那么就显示它们。

如果我将它移动到左侧，则显示以前的平局。

private void trackBar1_Scroll(object sender, EventArgs e) 
     { 
      if (addFrame == false) 
      { 

      } 
      else 
      { 
       currentFrameIndex = trackBar1.Value - 1; 
       textBox1.Text = "Frame Number : " + trackBar1.Value; 

       wireObject1.woc.Set(wireObjectAnimation1.GetFrame(currentFrameIndex)); 
       trackBar1.Minimum = 0; 
       trackBar1.Maximum = fi.Length - 1; 
       if (checkBox1.Checked) 
       { 
        setpicture(trackBar1.Value); 
        Graphics g = Graphics.FromImage(pictureBox1.Image); 
        g.Clear(SystemColors.Control); 
        pictureBox1.Invalidate(); 
       } 
       else 
       { 
        setpicture(trackBar1.Value); 
       } 
       pictureBox1.Refresh(); 

       button1.Enabled = false; 
       button2.Enabled = false; 
       button3.Enabled = false; 
       button4.Enabled = false; 
       button8.Enabled = false; 
       SaveFormPicutreBoxToBitMapIncludingDrawings(currentFrameIndex); 

       return; 

      } 

     } 

这是WireObjectGraphics类绘制函数：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Drawing; 

namespace AnimationEditor 
{ 
    class WireObjectGraphics 
    { 
     static Point connectionPointStart; 
     static Point connectionPointEnd; 
     static SolidBrush brush; 
     static Pen p = null; 

     public WireObjectGraphics() 
     { 

     } 

     public static void Draw(WireObject wo, Graphics graphics) 
     { 
      brush = new SolidBrush(Color.Red); 
      p = new Pen(brush); 
      Graphics g = graphics; 
      WireObject wireObject1 = wo; 

      if (wireObject1 != null) 
      { 
       for (int idx = 0; idx < wireObject1.woc.Point_X.Count; ++idx) 
       { 
        Point dPoint = new Point((int)wireObject1.woc.Point_X[idx], (int)wireObject1.woc.Point_Y[idx]); 
        dPoint.X = dPoint.X - 5; // was - 2 
        dPoint.Y = dPoint.Y - 5; // was - 2 
        Rectangle rect = new Rectangle(dPoint, new Size(10, 10)); 
        g.FillEllipse(brush, rect); 
        // bitmapGraphics.FillEllipse(brush, rect); 

        // g.FillEllipse(brush, rect); 
       } 

       for (int i = 0; i < wireObject1._connectionstart.Count; i++) 
       { 

        int startIndex = wireObject1._connectionstart[i]; 
        int endIndex = wireObject1._connectionend[i]; 



        connectionPointStart = new Point((int)wireObject1.woc.Point_X[startIndex], (int)wireObject1.woc.Point_Y[startIndex]); 
        connectionPointEnd = new Point((int)wireObject1.woc.Point_X[endIndex], (int)wireObject1.woc.Point_Y[endIndex]); 
        p.Width = 2; 
        g.DrawLine(p, connectionPointStart, connectionPointEnd); 
        // bitmapGraphics.DrawLine(p, connectionPointStart, connectionPointEnd); 
       } 
      } 
     } 

    } 


} 

我需要的是，第一次运行该程序能够得出！ 然后当移动trackBar到右检查绘制是否已经存在显示他们，如果不存在只显示图像，只有当我点击按钮，它会添加画框上的画。

如果我移到左边，allways会显示我在其他帧中所做的绘制。

WireObject类：

构造：

class WireObject 
    { 
     private string an; 
     private bool fnExt; 
     public string lockObject; 
     private int idx; 
     public WireObjectCoordinates woc; 
     private List<int> connectionStart = new List<int>(); 
     private List<int> connectionEnd = new List<int>(); 

     private const string version = "01.00"; 

     string wo_name; 


     public WireObject(string name) 
     { 
      wo_name = name; 
      woc = new WireObjectCoordinates(); 
      fnExt = false; 
     } 

在wireobject类我有一个连接点（像素），如删除像素一样保存和加载一些功能...

WireObjectCoordinates类是：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

namespace AnimationEditor 
{ 
    class WireObjectCoordinates 
    { 
     public List<float> Point_X = new List<float>(); 
     public List<float> Point_Y = new List<float>(); 

     public WireObjectCoordinates() 
     { 
     } 

     public WireObjectCoordinates(WireObjectCoordinates w) 
     { 
      Point_X.AddRange(w.Point_X); 
      Point_Y.AddRange(w.Point_Y); 
     } 

     public void Set(WireObjectCoordinates w) 
     { 
      if (w == null) 
      { 
      } 
      else 
      { 
       for (int i = 0; i < Point_X.Count; i++) 
       { 
        Point_X[i] = w.Point_X[i]; 
        Point_Y[i] = w.Point_Y[i]; 
       } 
      } 
     } 
    } 
} 

问题依然存在m1与标志何时显示像素的意思何时以及如何调用paintBox1.Refresh（）;但是一旦使用内部的Draw函数，一旦它不会。当我运行程序时，让我使用绘图功能，一旦我将trackBar移动到右侧，不要使用绘图功能。 。

Answer 1

Windows窗体控件的OnPaint时）的窗口重叠的电流控制被移出的方式或B只能调用）手动无效控制：http://msdn.microsoft.com/en-us/library/1e430ef4.aspx

所以OnPaint中应该得到所谓的太频繁。