private void OnResize(object sender, EventArgs eventArgs)
{
if (Image == null)
{
return;
}
Transformation = Transformation;
}
//public void DecideInitialTransformation()
//{
// Transformation = new ProTransformation(Point.Empty, int.MaxValue);
//}
/// <summary>
/// 用于初始显示的时候设置合适的scale
/// </summary>
/// <returns></returns>
private bool SetFitScale()
{
if (Image == null)
{
return(false);
}
var fitScale = CalcFitScale();
Transformation = Transformation.SetScale(fitScale);
return(true);
}
protected virtual void OnMouseMove(object sender, MouseEventArgs e)
{
if (_clickedPoint == null)
{
return;
}
var p = _transformation.ConvertToIm((Size)e.Location);
Transformation = _transformation.SetTranslate(_clickedPoint.Value - p);
Invalidate();
}
/// <summary>
/// 修正大小，防止太大或者太小
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private ProTransformation FixTranslation(ProTransformation value)
{
double maxScale = CalcFitScale(); //最大缩小到跟边框一样大小
if (value.Scale > maxScale)
{
value = value.SetScale(maxScale);
}
if (value.Scale < 0.3)
{
value = value.SetScale(0.3);
}
var rectSize = value.ConvertToIm(ClientRectangle.Size);
var max = new Size(Image.Width - rectSize.Width, Image.Height - rectSize.Height);
value = value.SetTranslate((new Point(Math.Min(value.Translation.X, max.Width), Math.Min(value.Translation.Y, max.Height))));
if (value.Translation.X < 0 || value.Translation.Y < 0)
{
value = value.SetTranslate(new Point(Math.Max(value.Translation.X, 0), Math.Max(value.Translation.Y, 0)));
}
return(value);
}
private void OnMouseWheel(object sender, MouseEventArgs e)
{
var transformation = _transformation;
var pos1 = transformation.ConvertToIm(e.Location); //转换到图像实际的位置
//Console.WriteLine(pos1);
//Console.WriteLine(this.Transformation.Scale);
if (e.Delta > 0)
{
transformation = (transformation.SetScale(Transformation.Scale / 1.25));
}
else
{
transformation = (transformation.SetScale(Transformation.Scale * 1.25));
}
////这里再处理一下缩小到了小于等于
var pos2 = transformation.ConvertToIm(e.Location);
transformation = transformation.AddTranslate(pos1 - (Size)pos2);
Transformation = transformation;
Invalidate();
}
public ProPictureBox()
{
_transformation = new ProTransformation(new Point(100, 0), .5f);
MouseDown += OnMouseDown;
MouseMove += OnMouseMove;
MouseUp += OnMouseUp;
MouseWheel += OnMouseWheel;
Resize += OnResize;
ImageChanged += OnImageChanged;
#region 右键菜单初始化
this.cmsPicBox = new System.Windows.Forms.ContextMenuStrip();
this.保存图像ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.旋转图像ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.左旋90度ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.右旋90度ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.垂直翻转ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.水平翻转ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
//
// cmsPicBox
//
this.cmsPicBox.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.保存图像ToolStripMenuItem,
this.旋转图像ToolStripMenuItem
});
this.cmsPicBox.Name = "cmsPicBox";
this.cmsPicBox.Size = new System.Drawing.Size(153, 70);
//
// 保存图像ToolStripMenuItem
//
this.保存图像ToolStripMenuItem.Name = "保存图像ToolStripMenuItem";
this.保存图像ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.保存图像ToolStripMenuItem.Text = "保存图像";
this.保存图像ToolStripMenuItem.Click += new System.EventHandler(this.保存图像ToolStripMenuItem_Click);
//
// 旋转图像ToolStripMenuItem
//
this.旋转图像ToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.左旋90度ToolStripMenuItem,
this.右旋90度ToolStripMenuItem,
this.垂直翻转ToolStripMenuItem,
this.水平翻转ToolStripMenuItem
});
this.旋转图像ToolStripMenuItem.Name = "旋转图像ToolStripMenuItem";
this.旋转图像ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.旋转图像ToolStripMenuItem.Text = "旋转图像";
//
// 左旋90度ToolStripMenuItem
//
this.左旋90度ToolStripMenuItem.Name = "左旋90度ToolStripMenuItem";
this.左旋90度ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.左旋90度ToolStripMenuItem.Text = "左旋90度";
this.左旋90度ToolStripMenuItem.Click += new System.EventHandler(this.左旋90度ToolStripMenuItem_Click);
//
// 右旋90度ToolStripMenuItem
//
this.右旋90度ToolStripMenuItem.Name = "右旋90度ToolStripMenuItem";
this.右旋90度ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.右旋90度ToolStripMenuItem.Text = "右旋90度";
this.右旋90度ToolStripMenuItem.Click += new System.EventHandler(this.右旋90度ToolStripMenuItem_Click);
//
// 垂直翻转ToolStripMenuItem
//
this.垂直翻转ToolStripMenuItem.Name = "垂直翻转ToolStripMenuItem";
this.垂直翻转ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.垂直翻转ToolStripMenuItem.Text = "垂直翻转";
this.垂直翻转ToolStripMenuItem.Click += new System.EventHandler(this.垂直翻转ToolStripMenuItem_Click);
//
// 水平翻转ToolStripMenuItem
//
this.水平翻转ToolStripMenuItem.Name = "水平翻转ToolStripMenuItem";
this.水平翻转ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
this.水平翻转ToolStripMenuItem.Text = "水平翻转";
this.水平翻转ToolStripMenuItem.Click += new System.EventHandler(this.水平翻转ToolStripMenuItem_Click);
#endregion
}