?
Solved

Dialog Units

Posted on 2001-06-29
5
Medium Priority
?
791 Views
Last Modified: 2013-11-20
I am developing an application for Windows CE where I have very specific sizing specifications (in pixels) for the various controls and dialogs.  The problem is that Microsoft uses "Dialog Units" (DLU's) to layout the dialog boxes and controls.  I need to layout the controls using pixels.

Does anyone know of a way to force 1 DLU = 1 pixel???  I'm not sure where MS does the conversion or if I can override a function call somewhere.  I tried overriding MapDialogRect in my CDialog-derived class, but the function is not called.

For a little background, 1 Horizontal DLU = 1/4 the average width of the dialog font.  1 Vertical DLU = 1/8 the average height of the dialog font.  I have tried using various fonts without any luck in getting both the DLU's = 1 pixel.

Any help would be appreciated!

-Eric
0
Comment
Question by:eholmberg
  • 3
  • 2
5 Comments
 
LVL 12

Expert Comment

by:migel
ID: 6239522
Hi!
how you layout controls?
in the resource editor?
0
 

Author Comment

by:eholmberg
ID: 6239531
Yes, with the resource editor.  I am currently resizing everything in the OnInitDialog() function.  The code for resizing the dialog is shown below:

     MoveWindow( 0,0,800,600);// resize to 800x600

This results in the proper pixel-size for the dialog, but it means that I must resize and reposition all of the controls on the dialog.  It would be extremely helpful to just layout the dialog and controls in the resource editor and be done with it.  Remember, this is going on a Windows CE device with a fixed display and fonts, etc.
0
 

Author Comment

by:eholmberg
ID: 6239535
Yes, with the resource editor.  I am currently resizing everything in the OnInitDialog() function.  The code for resizing the dialog is shown below:

     MoveWindow( 0,0,800,600);// resize to 800x600

This results in the proper pixel-size for the dialog, but it means that I must resize and reposition all of the controls on the dialog.  It would be extremely helpful to just layout the dialog and controls in the resource editor and be done with it.  Remember, this is going on a Windows CE device with a fixed display and fonts, etc.
0
 
LVL 12

Accepted Solution

by:
migel earned 200 total points
ID: 6239606
Hi!
simplest way:
int the resource editor set control to size 10x10 and look at runtime its size and then calculate coewfficients to translate DLU to pixels.
Another way is to walk around all controls in the dialog and manually resize it to proper size:
for eaxample:
CMyDialog::OnInitDialog()
{
CRect rc;
CRect rcChild;
GetWindowRect(&rc);
   MoveWindow( 0,0,800,600);// resize to 800x600
//
HWND hwndChild = ::GetWindow(m_hwnd, GW_CHILD);
// we use HWND for speed
while (hwndChild)
   {
   ::GetWindowRect(hwndChild, &rc);
   rc.left *= rc.Width()/800;
   rc.top *= rc.Height()/600;
   rc.right *= rc.Width()/800;
   rc.bottom *= rc.Height()/600;
   ScreenToClient(&rc);
   // and move it:
   ::MoveWindow(hwndChild,    rc.left,
   rc.top,
   rc.right-rc.left,  rc.bottom -rc.top, FALSE);
   hwndChild = ::GetWindow(hwndChild, GW_HWNDNEXT);
   }
}

0
 

Author Comment

by:eholmberg
ID: 6239679
Migel,

You're the man!  Thanks.  I changed your code slightly, here is what I used.  It works great, although ScreenToClient doesn't offset the y-coordinates for the task bar.  For my CE application, I don't have one, so it doesn't matter.  Good work!

Poka,
Eric


CRect     rc;
double     dHDLU,dVDLU;

GetWindowRect(&rc);

// Calculate the Pixel/DLU ratio
dHDLU = 800.0 / (rc.right - rc.left);
dVDLU = 600.0 / (rc.bottom - rc.top);

// Resize to 800 x 600
rc.left   *= dHDLU;
rc.right  *= dHDLU;
rc.top    *= dVDLU;
rc.bottom *= dVDLU;
MoveWindow( 0,0,rc.right - rc.left,rc.bottom - rc.top);

// Verify that we don't have any rounding errors
ASSERT(rc.right - rc.left == 800);
ASSERT(rc.bottom - rc.top == 600);

// Resize all of the controls to pixel sizes
HWND hwndChild = ::GetWindow(m_hWnd, GW_CHILD);
while (hwndChild)
{
     ::GetWindowRect(hwndChild, &rc);
     rc.left *= dHDLU;
     rc.right *= dHDLU;
     rc.top *= dVDLU;
     rc.bottom *= dVDLU;
     ScreenToClient(&rc);

     // and move it:
     ::MoveWindow(hwndChild, rc.left, rc.top, rc.right - rc.left,  rc.bottom - rc.top, FALSE);
     hwndChild = ::GetWindow(hwndChild, GW_HWNDNEXT);
}
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
Ready to get certified? Check out some courses that help you prepare for third-party exams.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Integration Management Part 2
Suggested Courses

621 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question