private void GraphCtrl_MouseMove(object sender, MouseEventArgs e)
{
switch (this.zoomOption)
{
case GraphCtrl.eZoomOption.ZoomIn:
if (e.Button != MouseButtons.Left)
break;
this.Refresh();
Graphics graphics = this.CreateGraphics();
Point point1 = new Point();
Point point2 = new Point();
point1.X = this.mousePos.X < e.X ? this.mousePos.X : e.X;
point2.X = this.mousePos.X >= e.X ? this.mousePos.X : e.X;
point1.Y = this.mousePos.Y < e.Y ? this.mousePos.Y : e.Y;
point2.Y = this.mousePos.Y >= e.Y ? this.mousePos.Y : e.Y;
Rectangle rect1 = new Rectangle(point1.X, point1.Y, point2.X - point1.X, point2.Y - point1.Y);
Rectangle rect2 = new Rectangle(point1.X, point1.Y, point2.X - point1.X + 1, point2.Y - point1.Y + 1);
graphics.SetClip(rect2);
graphics.DrawRectangle(new Pen(Color.Gray)
{
DashStyle = DashStyle.Dot
}, rect1);
break;
case GraphCtrl.eZoomOption.Hand:
if (e.Button != MouseButtons.Left)
break;
GraphCtrl.GraphFrame graphFrame = new GraphCtrl.GraphFrame();
this.workingArea = this.GraphWindow;
graphFrame.Left = this.frameZoom.Left - this.frameZoom.Width * (e.X - this.mousePos.X) / this.workingArea.Width;
graphFrame.Right = this.frameZoom.Right - this.frameZoom.Width * (e.X - this.mousePos.X) / this.workingArea.Width;
graphFrame.Top = this.frameZoom.Top - this.frameZoom.Height * (this.mousePos.Y - e.Y) / this.workingArea.Height;
graphFrame.Bottom = this.frameZoom.Bottom - this.frameZoom.Height * (this.mousePos.Y - e.Y) / this.workingArea.Height;
if (graphFrame.Left < this.frameFull.Left)
{
graphFrame.Left = this.frameFull.Left;
graphFrame.Right = this.frameFull.Left + this.frameZoom.Width;
}
if (graphFrame.Right > this.frameFull.Right)
{
graphFrame.Right = this.frameFull.Right;
graphFrame.Left = this.frameFull.Right - this.frameZoom.Width;
}
if (graphFrame.Top > this.frameFull.Top)
{
graphFrame.Top = this.frameFull.Top;
graphFrame.Bottom = this.frameFull.Top - this.frameZoom.Height;
}
if (graphFrame.Bottom < this.frameFull.Bottom)
{
graphFrame.Bottom = this.frameFull.Bottom;
graphFrame.Top = this.frameFull.Bottom + this.frameZoom.Height;
}
this.FrameZoom = graphFrame;
this.updateData = true;
break;
}
}
private void GraphCtrl_MouseUp(object sender, MouseEventArgs e)
{
switch (this.zoomOption)
{
case GraphCtrl.eZoomOption.ZoomIn:
if (e.Button != MouseButtons.Left)
break;
int num1 = this.mousePos.X < e.X ? this.mousePos.X : e.X;
int num2 = this.mousePos.X >= e.X ? this.mousePos.X : e.X;
int num3 = this.mousePos.Y < e.Y ? this.mousePos.Y : e.Y;
int num4 = this.mousePos.Y >= e.Y ? this.mousePos.Y : e.Y;
if (num1 == num2 || num3 == num4)
{
this.FrameZoom *= 0.5f;
}
else
{
GraphCtrl.GraphFrame graphFrame1 = new GraphCtrl.GraphFrame();
GraphCtrl.GraphFrame graphFrame2 = new GraphCtrl.GraphFrame();
this.workingArea = this.GraphWindow;
GraphCtrl.GraphFrame frameZoom = this.FrameZoom;
graphFrame2.Left = frameZoom.Left + frameZoom.Width * (num1 - this.workingArea.Left) / this.workingArea.Width;
graphFrame2.Right = frameZoom.Right - frameZoom.Width * (this.workingArea.Right - num2) / this.workingArea.Width;
graphFrame2.Top = frameZoom.Top - frameZoom.Height * (num3 - this.workingArea.Top) / this.workingArea.Height;
graphFrame2.Bottom = frameZoom.Bottom + frameZoom.Height * (this.workingArea.Bottom - num4) / this.workingArea.Height;
this.FrameZoom = graphFrame2;
}
this.updateData = true;
break;
}
}
private void GraphCtrl_MouseDown(object sender, MouseEventArgs e)
{
switch (this.zoomOption)
{
case GraphCtrl.eZoomOption.ZoomIn:
if (e.Button != MouseButtons.Left)
break;
this.mousePos = e.Location;
break;
case GraphCtrl.eZoomOption.ZoomOut:
if (e.Button != MouseButtons.Left)
break;
this.FrameZoom = this.FrameZoom * 1.5f;
this.updateData = true;
break;
case GraphCtrl.eZoomOption.Hand:
if (e.Button != MouseButtons.Left)
break;
this.mousePos = e.Location;
this.frameZoom = this.FrameZoom;
break;
}
}