如何控制标签或任何控件PictureBox的位置？ [英] How to control position of label or any control PictureBox?
问题描述
我正在PictureBox中成功移动控件（标签或图像）。当我移动时，它将保存控制位置（x，y）。
I'm moving control(label or image) success in PictureBox. When I move, it will save control position(x, y).
就像这样：
但是问题是：图像结果是：
But problem is: the image result is:
< a href = https://i.stack.imgur.com/QQ7Dd.jpg rel = nofollow noreferrer>
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上保存标签。
Before gif image, I was drag and drop a label control in center screen. But result image doesn't save label in center screen.
我将PictureBox属性设置为StretchImage。
I was set PictureBox attribute to StretchImage.
我的代码来获取PictureBox中的位置和DrawText，例如：
My code to get position and DrawText in PictureBox like:
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。
My code is parent control(PictureBox) contain all control.
在我的课堂上，我使用的是：
In my class, I'm using this:
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：
Draw image using CtrlPost(x, y):
g.DrawImage(
DrawText(image, new Font(cbxFont.Text, fontSize), colorInput,
Color.Transparent),
new Point(CtrlPos.x, CtrlPos.y));
// g is Graphics object.
已更新：
我正在使用代码添加 label1 到 pictureBox1 像这样：
pictureBox1.Controls.Add（ label1）;
推荐答案
如果您的 PictureBox 处于 Sizemodes StretchImage 或 Zoom 中，则像素为缩放标签的位置不是。这样就可以计算出绘制位置：
If your PictureBox is in Sizemodes StretchImage or Zoom then the pixels are scaled; the Label's Location however is not. So you would have the calculate the position where to draw:
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));
如果您还想更正大小，可以使用类似的功能。
If you also want to correct the size you can use a similar function..
如果 SizeMode 是 CenterImage ，则像素不
对于另一个方向，只需在分数中切换分母和分子即可。
For the other direction simply switch denominator and numerator in the fractions!
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