How to convert panel coordinates to rectangle coordinates?

[positrom2]

Using Designer I have a panel with coordinates defined by (left,top,width,height). I want to create a rectangle covering the panel. Unfortunately, the rectangle properties are defined differently as (left,top,right,bottom), and I am struggling to get the right values from the panel properties. How to get the rectangle properties from the panel properties?
Thanks, positrom2

 

[Mahares]

I think this is what you are looking for. If not, forgive me:

Rectangle.left=Panel.Left
Rectangle.Top=Panel.Top
Rectangle.Right=Panel.Left + Panel.Width
Rectangle.Bottom=Panel.Top + Panel.Height

 

[positrom2]

Thanks, Mahares,
I had already done as you suggested, but it does not work (the panel color does not change to black).

The panel properties in designer are:
left=0, top=480,width=220,height=300.
The code looks like

Dim pnlpeaks As Panel
Dim rect1 As Rect
cvspeaks.Initialize(pnlpeaks)
rect1.Initialize(0, 480, 220, 780)
cvspeaks.DrawRect(rect1, Colors.Black, True, 1)
Activity.invalidate

The color of the panel does not change.

With another rectangle, on a different canvas, painting the panel in black works. But there I had initialized the rectangle for a panel with coordinates
left=220,top=310,width=380,height=470 by

rect2.Initialize(0, 0, 100%x, 100%y)

Is there a misunderstanding in the coordinate designations?

Thanks, positrom2

 

[Erel]

You should always use dip units when specifying pixel measurements.

You should invalidate the panel not the activity.

 

[positrom2]

Erel, thanks, but:

You should always use dip units when specifying pixel measurements.

but: The beginner's guide tells that

The values for the Left, Top, Width and Height properties in the Designer are considered as
dip values.

I also tried

rect1.Initialize(0, 480dip, 220dip, 780dip)

with the rect coordinates read out from designer, but it does not give the expected result, whereas (0,0,100%x,100%y) is allright!

So it is unclear to me how the coordinate system for rectangle definition is defined and what dip means in the rectangle definition.

Thanks, positrom2

 

[Mahares]

@positrom: I created on the designer a layout called Rectangle 480x800, with scale:1. I put a panel on it called: pnlPeaks. The panel has the same dimensions as yours: L=0, T=480, W=220 and H=300. See below code where I was able to overlap the rectangle to the panel background. I hope this is what you are looking to achieve.

Dim Rect1 As Rect
Dim pnlPeaks As Panel
Dim cvspeaks As Canvas

Activity.LoadLayout("Rectangle")
cvspeaks.Initialize(pnlPeaks)      'Canvas is drawn on panel background
Rect1.Initialize(0,0,220dip,300dip)
cvspeaks.DrawRect(Rect1,Colors.Red,True,0dip)

 

[positrom2]

Mahares,
Yes, that works. So what I learn is that rectangles drawn on a panel will have their origin in the left, top corner of the panel. Then R=W and B=H which is easy. Maybe I missed that rule when I searched on this issue.
Thanks, positrom2