#include <windows.h>
static void FixupDialogItem(
HINSTANCE hInst,
HWND hDlg,
LPDLGITEMTEMPLATE lpDlgItem,
LPWORD lpClass,
LPWORD lpData);
static LPBYTE WalkDialogData(LPBYTE lpData);
//////////////////////////////////////////////////////////////////////////////
// FUNCTION: RelayoutDialog
//
// PURPOSE: Re-lays out a dialog based on a dialog template. This function
// iterates through all the child window controls and does a SetWindowPos
// for each. It also does a SetWindowText for each static text control
// and updates the selected bitmap or icon in a static image control.
// This assumes that the current dialog and the new template have all the
// same controls, with the same IDCs.
//
// ON ENTRY:
// HINSTANCE hInst: the hInstance of the current module.
// HWND hDlg: the dialog to layout.
// LPCWSTR iddTemplate: the new template for the dialog (can use
// the MAKEINTRESOURCE macro).
//
// ON EXIT: TRUE if success; FALSE if failure (either the iddTemplate is
// invalid, or there are two or more IDC_STATICs in the template).
//
BOOL RelayoutDialog(HINSTANCE hInst, HWND hDlg, LPCWSTR iddTemplate)
{
HRSRC hRsrc = FindResource((HMODULE)hInst, iddTemplate, RT_DIALOG);
if (hRsrc == NULL)
{
return FALSE;
}
HGLOBAL hGlobal = LoadResource((HMODULE)hInst, hRsrc);
if (hGlobal == NULL)
{
return FALSE;
}
INT nStatics = 0;
LPBYTE lpData = (LPBYTE)LockResource(hGlobal);
LPDLGTEMPLATE lpTemplate = (LPDLGTEMPLATE)lpData;
HDWP hDWP = BeginDeferWindowPos(lpTemplate->cdit);
//
// See documentation on the DLGTEMPLATE and DLGITEMTEMPLATE structs
// for more information on the data structures we are walking.
//
lpData += sizeof(DLGTEMPLATE);
lpData = WalkDialogData(lpData); // menu
lpData = WalkDialogData(lpData); // class
lpData = WalkDialogData(lpData); // title
if (lpTemplate->style & DS_SETFONT)<
{
lpData += sizeof(WORD); // font size.
lpData = WalkDialogData(lpData); // font face.
}
for (int i = 0; i < lpTemplate->cdit; i++)
{
lpData = (LPBYTE) (((INT)lpData + 3) & ~3); // force to DWORD boundary.
LPDLGITEMTEMPLATE lpDlgItem = (LPDLGITEMTEMPLATE)lpData;
HWND hwndCtl = GetDlgItem(hDlg, lpDlgItem->id);
if (lpDlgItem->id == 0xFFFF)
{
nStatics++;
}
//
// Move the item around.
//
{
RECT r;
r.left = lpDlgItem->x;
r.top = lpDlgItem->y;
r.right = lpDlgItem->x + lpDlgItem->cx;
r.bottom = lpDlgItem->y + lpDlgItem->cy;
MapDialogRect(hDlg, &r);
DeferWindowPos(hDWP, hwndCtl, NULL,
r.left, r.top, r.right - r.left, r.bottom - r.top, SWP_NOZORDER);
}
lpData += sizeof(DLGITEMTEMPLATE);
LPWORD lpClass = (LPWORD)lpData;
lpData = WalkDialogData(lpData); // class
//
// Do some special handling for each dialog item (changing text,
// bitmaps, ensuring visible, etc.
//
FixupDialogItem(hInst, hDlg, lpDlgItem, lpClass, (LPWORD)lpData);
lpData = WalkDialogData(lpData); // title
WORD cbExtra = *((LPWORD)lpData); // extra class data.
lpData += (cbExtra ? cbExtra : sizeof(WORD));
}
EndDeferWindowPos(hDWP);
return nStatics < 2 ? TRUE : FALSE;
}
//
// Called by RelayoutDialog to advance to the next item in the dialog template.
//
static LPBYTE WalkDialogData(LPBYTE lpData)
{
LPWORD lpWord = (LPWORD)lpData;
if (*lpWord == 0xFFFF)
{
return (LPBYTE)(lpWord + 2);
}
while (*lpWord != 0x0000)
{
lpWord++;
}
return (LPBYTE)(lpWord + 1);
}
//
// Post-processing step for each dialog item.
// Static controls and buttons: change text and bitmaps.
// Listboxes and combo boxes: ensures that the selected item is visible.
//
static void FixupDialogItem(
HINSTANCE hInst,
HWND hDlg,
LPDLGITEMTEMPLATE lpDlgItem,
LPWORD lpClass,
LPWORD lpData)
{
if (lpClass[0] == 0xFFFF)
{
switch (lpClass[1])
{
case 0x0080: // button
case 0x0082: // static
{
if (lpData[0] == 0xFFFF)
{
if (lpDlgItem->style & SS_ICON)
{
HICON hOld = (HICON)SendDlgItemMessage(hDlg,
lpDlgItem->id, STM_GETIMAGE, IMAGE_ICON, 0);
HICON hNew = LoadIcon(hInst, MAKEINTRESOURCE(lpData[1]));
SendDlgItemMessage(hDlg, lpDlgItem->id,
STM_SETIMAGE, IMAGE_ICON, (LPARAM)hNew);
DestroyIcon(hOld);
}
else if (lpDlgItem->style & SS_BITMAP)
{
HBITMAP hOld = (HBITMAP)SendDlgItemMessage(hDlg,
lpDlgItem->id, STM_GETIMAGE, IMAGE_BITMAP, 0);
HBITMAP hNew = LoadBitmap(hInst, MAKEINTRESOURCE(lpData[1]));
SendDlgItemMessage(hDlg, lpDlgItem->id,
STM_SETIMAGE, IMAGE_BITMAP, (LPARAM)hNew);
DeleteObject(hOld);
}
}
else // lpData[0] is not 0xFFFF (it's text).
{
SetDlgItemText(hDlg, lpDlgItem->id, (LPCTSTR)lpData);
}
}
break;
case 0x0083: // list box
{
INT nSel = SendDlgItemMessage(hDlg, lpDlgItem->id, LB_GETCURSEL, 0, 0);
if (nSel != LB_ERR)
{
SendDlgItemMessage(hDlg, lpDlgItem->id, LB_SETCURSEL, nSel, 0);
}
}
break;
case 0x0085: // combo box
{
INT nSel = SendDlgItemMessage(hDlg, lpDlgItem->id, CB_GETCURSEL, 0, 0);
if (nSel != CB_ERR)
{
SendDlgItemMessage(hDlg, lpDlgItem->id, CB_SETCURSEL, nSel, 0);
}
}
break;
}
}
}
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