[英]How to control position of label or any control PictureBox?
我在PictureBox中移动控件(标签或图像)成功。 当我移动时,它将保存控制位置(x,y)。
像这样:
但是问题是:图像结果是:
在gif图像之前,我将标签控件拖放到中心屏幕中。 但是结果图像不会在中心屏幕中保存标签。
我将PictureBox属性设置为StretchImage。
我的代码来获取PictureBox中的位置和DrawText,例如:
public PositionControl CtrlPos = new PositionControl();
private void control_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Control control = (Control)sender;
Point nextPosition = new Point();
nextPosition = picPreview.PointToClient(MousePosition);
nextPosition.Offset(mouseX, mouseY);
control.Location = nextPosition;
CtrlPos.x = nextPosition.X;
CtrlPos.y = nextPosition.Y;
Invalidate();
}
}
我的代码是父控件(PictureBox)包含所有控件。
在我的课堂上,我使用的是:
private void picPreview_MouseMove(object sender, MouseEventArgs e)
{
if (SelectedControl != null && e.Button == MouseButtons.Left)
{
timer1.Stop();
Invalidate();
if (SelectedControl.Height < 20)
{
SelectedControl.Height = 20;
direction = Direction.None;
Cursor = Cursors.Default;
return;
}
else if (SelectedControl.Width < 20)
{
SelectedControl.Width = 20;
direction = Direction.None;
Cursor = Cursors.Default;
return;
}
//get the current mouse position relative the the app
Point pos = picPreview.PointToClient(MousePosition);
#region resize the control in 8 directions
if (direction == Direction.NW)
{
//north west, location and width, height change
newLocation = new Point(pos.X, pos.Y);
newSize = new Size(SelectedControl.Size.Width - (newLocation.X - SelectedControl.Location.X),
SelectedControl.Size.Height - (newLocation.Y - SelectedControl.Location.Y));
SelectedControl.Location = newLocation;
CtrlPos.x = newLocation.X;
CtrlPos.y = newLocation.Y;
SelectedControl.Size = newSize;
}
else if (direction == Direction.SE)
{
//south east, width and height change
newLocation = new Point(pos.X, pos.Y);
newSize = new Size(SelectedControl.Size.Width + (newLocation.X - SelectedControl.Size.Width - SelectedControl.Location.X),
SelectedControl.Height + (newLocation.Y - SelectedControl.Height - SelectedControl.Location.Y));
SelectedControl.Size = newSize;
}
else if (direction == Direction.N)
{
//north, location and height change
newLocation = new Point(SelectedControl.Location.X, pos.Y);
newSize = new Size(SelectedControl.Width,
SelectedControl.Height - (pos.Y - SelectedControl.Location.Y));
SelectedControl.Location = newLocation;
SelectedControl.Size = newSize;
}
else if (direction == Direction.S)
{
//south, only the height changes
newLocation = new Point(pos.X, pos.Y);
newSize = new Size(SelectedControl.Width,
pos.Y - SelectedControl.Location.Y);
SelectedControl.Size = newSize;
}
else if (direction == Direction.W)
{
//west, location and width will change
newLocation = new Point(pos.X, SelectedControl.Location.Y);
newSize = new Size(SelectedControl.Width - (pos.X - SelectedControl.Location.X),
SelectedControl.Height);
SelectedControl.Location = newLocation;
SelectedControl.Size = newSize;
}
else if (direction == Direction.E)
{
//east, only width changes
newLocation = new Point(pos.X, pos.Y);
newSize = new Size(pos.X - SelectedControl.Location.X,
SelectedControl.Height);
SelectedControl.Size = newSize;
}
else if (direction == Direction.SW)
{
//south west, location, width and height change
newLocation = new Point(pos.X, SelectedControl.Location.Y);
newSize = new Size(SelectedControl.Width - (pos.X - SelectedControl.Location.X),
pos.Y - SelectedControl.Location.Y);
SelectedControl.Location = newLocation;
SelectedControl.Size = newSize;
}
else if (direction == Direction.NE)
{
//north east, location, width and height change
newLocation = new Point(SelectedControl.Location.X, pos.Y);
newSize = new Size(pos.X - SelectedControl.Location.X,
SelectedControl.Height - (pos.Y - SelectedControl.Location.Y));
SelectedControl.Location = newLocation;
SelectedControl.Size = newSize;
}
#endregion
}
}
使用CtrlPost(x,y)绘制图像:
g.DrawImage(
DrawText(image, new Font(cbxFont.Text, fontSize), colorInput,
Color.Transparent),
new Point(CtrlPos.x, CtrlPos.y));
// g is Graphics object.
更新:我正在使用代码像这样将label1
添加到pictureBox1
:
pictureBox1.Controls.Add(label1);
如果您的PictureBox
处于Sizemodes
StretchImage
或Zoom
Sizemodes
StretchImage
Zoom
像素;否则,将缩放比例。 但是Label
的Location
不是。 这样就可以计算出绘制位置:
PointF stretched(Point p0, PictureBox pb)
{
if (pb.Image == null) return PointF.Empty;
float scaleX = 1f * pb.Image.Width / pb.ClientSize.Width;
float scaleY = 1f * pb.Image.Height / pb.ClientSize.Height;
return new PointF(p0.X * scaleX, p0.Y * scaleY);
}
您将其称为PointF p1 = stretched(p0, pictureBox1);
您可能会这样绘制:
g.DrawImage( DrawText(image, new Font(cbxFont.Text, fontSize),
colorInput, Color.Transparent),
Point.Round(stretched( CtrlPos.Location, picPreview));
如果您还想更正尺寸,可以使用类似的功能。
如果SizeMode
为CenterImage
,则不会缩放像素,但很可能会转置像素,因此也必须进行校正。
对于另一个方向,只需在分数中切换分母和分子!
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