private void BmpForm_MouseMove(object sender, MouseEventArgs e)
{
if (IsLBtnPress == true) // 鼠标左键按下时发生的事件
{
CopyBmp = (Bitmap)OriginBmp.Clone();
CopyBmp.SetResolution(96, 96);
CopyGraphics = Graphics.FromImage(CopyBmp); // 把屏幕原始图像复制到CopyBmp上
DrawPen = new Pen(Color.DeepSkyBlue, 2); // 新建画笔DrawPen
BackSolidBr = new SolidBrush(Color.FromArgb(130, Color.Gray));
if (IsStart) // 开始截屏
{
RecBeginPoint = e.Location;
RecWidth = Math.Abs(BeginPoint.X - RecBeginPoint.X); // 截屏区域矩形宽度
RecHeigth = Math.Abs(BeginPoint.Y - RecBeginPoint.Y); // 截屏区域矩形高度
if (BeginPoint.X < RecBeginPoint.X)
{
RecBeginPoint.X = BeginPoint.X;
}
if (BeginPoint.Y < RecBeginPoint.Y)
{
RecBeginPoint.Y = BeginPoint.Y;
}
}
else if (IsMove) // 移动截屏区域
{
offsetX = e.X - DownPoint.X; // X方向平移的偏移量
offsetY = e.Y - DownPoint.Y; // Y方向平移的偏移量
RecBeginPoint.Offset(offsetX, offsetY);
if (RecBeginPoint.Y <= 0) // 防止移动出屏幕外
{
RecBeginPoint.Y = 0;
}
else if (RecBeginPoint.Y + RecHeigth >= ScreenHeight)
{
RecBeginPoint.Y = ScreenHeight - RecHeigth;
}
if (RecBeginPoint.X <= 0)
{
RecBeginPoint.X = 0;
}
else if (RecBeginPoint.X + RecWidth >= ScreenWidth)
{
RecBeginPoint.X = ScreenWidth - RecWidth;
}
DownPoint = e.Location;
}
else if (IsResize) // 改变截屏区域大小
{
switch (resize_type)
{
case Resize_Type.LeftTop: // 从左上方拖动
RecWidth = Math.Abs(e.X - RecRightBottom.X);
RecHeigth = Math.Abs(e.Y - RecRightBottom.Y);
if (e.X > RecRightBottom.X)
{
RecBeginPoint.X = RecRightBottom.X;
}
else
{
RecBeginPoint.X = e.X;
}
if (e.Y > RecRightBottom.Y)
{
RecBeginPoint.Y = RecRightBottom.Y;
}
else
{
RecBeginPoint.Y = e.Y;
}
break;
case Resize_Type.LeftMid: // 从左中拖动
RecWidth = Math.Abs(e.X - RecRightTop.X);
if (e.X > RecRightTop.X)
{
RecBeginPoint.X = RecRightTop.X;
}
else
{
RecBeginPoint.X = e.X;
}
break;
case Resize_Type.LeftBottom: // 从左下方拖动
RecWidth = Math.Abs(e.X - RecRightTop.X);
RecHeigth = Math.Abs(e.Y - RecRightTop.Y);
if (e.X < RecRightTop.X)
{
RecBeginPoint.X = e.X;
}
else
{
RecBeginPoint.X = RecRightTop.X;
}
if (e.Y < RecRightTop.Y)
{
RecBeginPoint.Y = e.Y;
}
else
{
RecBeginPoint.Y = RecRightTop.Y;
}
break;
case Resize_Type.MidTop:
RecHeigth = Math.Abs(e.Y - RecLeftBottom.Y);
if (e.Y < RecLeftBottom.Y)
{
RecBeginPoint.Y = e.Y;
}
else
{
RecBeginPoint.Y = RecLeftBottom.Y;
}
break;
case Resize_Type.MidBottom:
RecHeigth = Math.Abs(e.Y - RecLeftTop.Y);
if (e.Y > RecLeftTop.Y)
{
RecBeginPoint = RecLeftTop;
}
else
{
RecBeginPoint.Y = e.Y;
}
break;
case Resize_Type.RightTop:
RecWidth = Math.Abs(e.X - RecLeftBottom.X);
RecHeigth = Math.Abs(e.Y - RecLeftBottom.Y);
if (e.X < RecLeftBottom.X)
{
RecBeginPoint.X = e.X;
}
else
{
RecBeginPoint.X = RecLeftBottom.X;
}
if (e.Y < RecLeftBottom.Y)
{
RecBeginPoint.Y = e.Y;
}
else
{
RecBeginPoint.Y = RecLeftBottom.Y;
}
break;
case Resize_Type.RightMid:
RecWidth = Math.Abs(e.X - RecLeftTop.X);
if (e.X < RecLeftTop.X)
{
RecBeginPoint.X = e.X;
}
else
{
RecBeginPoint.X = RecLeftTop.X;
}
break;
case Resize_Type.RightBottom:
RecWidth = Math.Abs(e.X - RecLeftTop.X);
RecHeigth = Math.Abs(e.Y - RecLeftTop.Y);
if (e.X < RecLeftTop.X)
{
RecBeginPoint.X = e.X;
}
else
{
RecBeginPoint.X = RecLeftTop.X;
}
if (e.Y < RecLeftTop.Y)
{
RecBeginPoint.Y = e.Y;
}
else
{
RecBeginPoint.Y = RecLeftTop.Y;
}
break;
}
}
RefreshRec();
return;
}
else if (IsLBtnPress == true && this.paintmode == PaintMode.EditMode)
{
SolidBrush solidBrush = new SolidBrush(Color.Red);
lineendpoint = e.Location;
RefreshPaintRegion();
}
// 鼠标移动时没有任何键按下时发生的事件
CurrentPoint = e.Location;
if (LeftTop.Contains(CurrentPoint) || RightBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNWSE;
}
else if (RightTop.Contains(CurrentPoint) || LeftBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNESW;
}
else if (MidTop.Contains(CurrentPoint) || MidBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNS;
}
else if (LeftMid.Contains(CurrentPoint) || RightMid.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeWE;
}
else if (CapRec.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeAll;
}
else
{
this.Cursor = Cursors.Arrow;
}
}
private void BmpForm_MouseDown(object sender, MouseEventArgs e)
{
if (this.paintmode == PaintMode.EditMode)
{
linebeginpoint = e.Location;
IsLBtnPress = true;
Graphics grah = this.CreateGraphics();
grah.DrawLine(new Pen(new SolidBrush(Color.Red)), new Point(0, 0), new Point(500, 500));
}
else if (this.paintmode == PaintMode.none)
{
if (e.Button == MouseButtons.Left) // 左键被按下时
{
this.toolStrip1.Hide();
IsLBtnPress = true;
CurrentPoint = e.Location;
Rectangle NewCapRec = new Rectangle(new Point(CapRec.X + 5, CapRec.Y + 5), new Size(CapRec.Width - 10, CapRec.Height - 10));
RecRightBottom = new Point(RecBeginPoint.X + RecWidth, RecBeginPoint.Y + RecHeigth);
RecRightTop = new Point(RecBeginPoint.X + RecWidth, RecBeginPoint.Y);
RecLeftTop = RecBeginPoint;
RecLeftBottom = new Point(RecBeginPoint.X, RecBeginPoint.Y + RecHeigth);
if (NewCapRec.Contains(CurrentPoint)) // 左键按下时，如果落在矩形区域内，则表示要移动已经选择了的矩形
{
this.Cursor = Cursors.SizeAll;
IsMove = true;
DownPoint = e.Location;
}
else if (LeftTop.Contains(CurrentPoint)) // 左键按下时，如果落在八个小矩形对应的范围内，则表示择了的矩形
{
this.Cursor = Cursors.SizeNWSE;
IsResize = true;
resize_type = Resize_Type.LeftTop;
}
else if (LeftMid.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeWE;
IsResize = true;
resize_type = Resize_Type.LeftMid;
}
else if (LeftBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNESW;
IsResize = true;
resize_type = Resize_Type.LeftBottom;
}
else if (MidTop.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNS;
IsResize = true;
resize_type = Resize_Type.MidTop;
}
else if (MidBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNS;
IsResize = true;
resize_type = Resize_Type.MidBottom;
}
else if (RightTop.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNESW;
IsResize = true;
resize_type = Resize_Type.RightTop;
}
else if (RightMid.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeWE;
IsResize = true;
resize_type = Resize_Type.RightMid;
}
else if (RightBottom.Contains(CurrentPoint))
{
this.Cursor = Cursors.SizeNWSE;
IsResize = true;
resize_type = Resize_Type.RightBottom;
}
else if (!CapRec.Contains(CurrentPoint))
{
this.Cursor = Cursors.Cross;
IsStart = true;
BeginPoint = e.Location;
}
}
}
}