C#之PixturBox控件实现缩放和拖动图片 |
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一、实现鼠标滚轮控制图片缩放； 1、设置PixtureBox属性： Dock：none SizeMode：StretchImage 2、添加事件： pbxDrawing.MouseWheel += new MouseEventHandler(pbxDrawing_MouseWheel); private void ScrewInfoForm_Shown(object sender, EventArgs e) { //加载装配图纸 string drawingPath = Path.Combine(@"\\192.168.2.136\PCS", productCode + ".png"); try { pbxDrawing.Load(drawingPath); } catch (Exception ex) { MessageBox.Show("加载装配图纸失败,详细:" + ex.Message, "测量", MessageBoxButtons.OK, MessageBoxIcon.Error); return; } } //实现滚轮缩放 private void pbxDrawing_MouseWheel(object sender, System.Windows.Forms.MouseEventArgs e) { if (e.Delta < 0) { this.pbxDrawing.Width = this.pbxDrawing.Width * 9 / 10; this.pbxDrawing.Height = this.pbxDrawing.Height * 9 / 10; } else { this.pbxDrawing.Width = this.pbxDrawing.Width * 11 / 10; this.pbxDrawing.Height = this.pbxDrawing.Height * 11 / 10; } } //实现移动图片 int xPos; int yPos; bool MoveFlag; private void pbxDrawing_MouseDown(object sender, MouseEventArgs e) { this.pbxDrawing.Focus(); MoveFlag = true;//已经按下. xPos = e.X;//当前x坐标. yPos = e.Y;//当前y坐标. } //在picturebox的鼠标按下事件里. private void pbxDrawing_MouseUp(object sender, MouseEventArgs e) { MoveFlag = false; } //在picturebox鼠标移动 private void pbxDrawing_MouseMove(object sender, MouseEventArgs e) { if (MoveFlag) { pbxDrawing.Left += Convert.ToInt16(e.X - xPos);//设置x坐标. pbxDrawing.Top += Convert.ToInt16(e.Y - yPos);//设置y坐标. } }
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