How to set the border size of a window

mastupristi · Mar 22nd 2018, 3:46pm

in the emWin 5.40 reference manual I find:
--------------------------------
WM_GetInsideRect()
Description
Returns the coordinates of the client area of the active widget less the border size.
The function sends a message to the active window to retrieve the inside rectangle.
If the widget does not handle the message (that means the widget has no border)
WM_GetClientRect will be used to calculate the rectangle. The result is given in win-
dow coordinates. That means x0 and y0 of the GUI_RECT structure corresponds to
the border size in x and y, x1 and y1 corresponds to the size of the window less the
border size - 1.
---------------------------

He talks about a window border.
I am writing a new custom widget, how do I set the border, for example 1 pixel, so that WM_GetInsideRect() considers it?

best regards
Max

SEGGER - Schoenen · Mar 23rd 2018, 8:55am

Hi,

I am writing a new custom widget, how do I set the border, for example 1 pixel, so that WM_GetInsideRect() considers it?

Your custom widget has to react on WM_GET_INSIDE_RECT and set the data pointer of the message.

Like this:

C Source Code

case WM_GET_INSIDE_RECT:
pRect = (GUI_RECT *)(pMsg->Data.p);
pRect->x0 = 1;
pRect->y0 = 2;
pRect->x1 = 3;
pRect->y1 = 4;
break;

How the border is calculated is up to you. You could use the rectangle return by WM_GetClientRect() and reduce it about the border size.

I think we should adapt the manual at this point, since the message WM_GET_INSIDE_RECT is not documented.

Regards
Sven

C Source Code

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