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Microsoft Windows NT Build 511 (SDK Final Release) 07-24-1993
/******************************************************************************\
* This is a part of the Microsoft Source Code Samples.
* Copyright (C) 1993 Microsoft Corporation.
* All rights reserved.
* This source code is only intended as a supplement to
* Microsoft Development Tools and/or WinHelp documentation.
* See these sources for detailed information regarding the
* Microsoft samples programs.
\******************************************************************************/
/****************************** Module Header *******************************
* Module Name: addctrl.c
*
* Contains routines for adding (creating) and deleting controls.
*
* Functions:
*
* AddNewDialog()
* DropControl()
* AddControl()
* CreateControl()
* CreateDlgFont()
* MyGetCharDimensions()
* AdjustDefaultSizes()
* DeleteControl()
* DeleteDialog()
* DeleteControl2()
* FreeCTYPE()
*
* Comments:
*
****************************************************************************/
#include "dlgedit.h"
#include "dlgfuncs.h"
#include "dlgextrn.h"
#include "dialogs.h"
#include <stdlib.h>
#include <string.h>
STATICFN HFONT CreateDlgFont(HWND hwnd, LPTSTR pszFontName,
INT nPointSize);
STATICFN INT MyGetCharDimensions(HWND hwnd, HFONT hFont,
PTEXTMETRIC ptm);
STATICFN VOID AdjustDefaultSizes(VOID);
STATICFN VOID DeleteControl2(NPCTYPE npcDel);
STATICFN VOID FreeCTYPE(NPCTYPE npc);
/************************************************************************
* AddNewDialog
*
* High level function to add a new dialog to the current resource.
* Any existing dialog will be saved away in the resource buffer.
* The dialog is created at a default position and size with default
* styles.
*
************************************************************************/
VOID AddNewDialog(VOID)
{
RECT rc;
if (gfEditingDlg) {
if (!SynchDialogResource())
return;
DeleteDialog(FALSE);
}
/*
* Now drop a new dialog window.
*/
SetRect(&rc, DEFDIALOGXPOS, DEFDIALOGYPOS,
DEFDIALOGXPOS + awcd[W_DIALOG].cxDefault,
DEFDIALOGYPOS + awcd[W_DIALOG].cyDefault);
DropControl(&awcd[W_DIALOG], &rc);
}
/************************************************************************
* DropControl
*
* This function drops a new control of Type at the specified
* location. The default style and text of the control is
* determined from the awcd table based on its type. The control
* is selected after being dropped. This function changes the status
* window to reflect the selected control.
*
* Arguments:
* PWINDOWCLASSDESC pwcd - Describes the type of new control.
* PRECT prc - Rectangle of the new control (in dialog units).
*
************************************************************************/
VOID DropControl(
PWINDOWCLASSDESC pwcd,
PRECT prc)
{
ORDINAL ordIcon;
ORDINAL ordDlg;
LPTSTR pszText;
NPCTYPE npcNew;
INT idCtrl;
DIALOGINFO di;
/*
* Get the next available id to use for the new control.
*/
idCtrl = NextID((pwcd->iType == W_DIALOG) ? NEXTID_DIALOG : NEXTID_CONTROL,
plInclude, 0);
if (pwcd->iType == W_ICON) {
/*
* For icon controls, the text is really an ordinal or name
* of the icon resource to display. We get the next available
* id (skipping the id we just got for the control itself) to
* use as an ordinal.
*/
WriteOrd(&ordIcon, NextID(NEXTID_CONTROL, plInclude, idCtrl));
pszText = (LPTSTR)&ordIcon;
}
else {
pszText = pwcd->pszTextDefault;
}
/*
* Make the control.
*/
if (pwcd->iType == W_DIALOG) {
/*
* Pick a default name for the dialog.
*/
WriteOrd(&ordDlg, NextID(NEXTID_DIALOG, plInclude, 0));
di.fResFlags = DEFDLGMEMFLAGS;
di.wLanguage = MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL);
di.pszClass = NULL;
di.pszMenu = NULL;
di.DataVersion = 0;
di.Version = 0;
di.Characteristics = 0;
di.nPointSize = DEFPOINTSIZE;
lstrcpy(di.szFontName, ids(IDS_DEFFONTNAME));
npcNew = AddControl(pwcd, pszText,
pwcd->flStyles, pwcd->flExtStyle, idCtrl,
prc->left, prc->top,
prc->right - prc->left, prc->bottom - prc->top,
(LPTSTR)&ordDlg, &di);
}
else {
npcNew = AddControl(pwcd, pszText,
pwcd->flStyles, pwcd->flExtStyle, idCtrl,
prc->left, prc->top,
prc->right - prc->left, prc->bottom - prc->top,
NULL, NULL);
}
if (!npcNew)
return;
/*
* If we just dropped a dialog, we need to now show it.
* It it was some other control, mark the dialog as having
* been changed.
*/
if (pwcd->iType == W_DIALOG) {
ShowWindow(npcNew->hwnd, SW_SHOWNA);
ToolboxOnTop();
}
else {
gfDlgChanged = TRUE;
}
SelectControl(npcNew, FALSE);
gfResChged = TRUE;
ShowFileStatus(FALSE);
/*
* Now we determine if one of the fields in the status ribbon
* should be given the focus initially. The assumption is that
* there are some things that a user will always want to change
* when dropping a new control, such as the text in a push
* button, for example.
*/
idCtrl = 0;
switch (pwcd->iType) {
case W_ICON:
/*
* For icons, the first thing the user will
* probably want to do is to change the name.
*/
idCtrl = DID_STATUSNAME;
break;
default:
/*
* If this control has text, they will probably want
* to change it. This includes the caption if the
* control is a dialog.
*/
if (pwcd->fHasText)
idCtrl = DID_STATUSTEXT;
break;
}
if (idCtrl) {
SendDlgItemMessage(hwndStatus, idCtrl,
EM_SETSEL, (WPARAM)(0), (LONG)(-1));
SetFocus(GetDlgItem(hwndStatus, idCtrl));
}
}
/************************************************************************
* AddControl
*
* This function is used to add a new control. CreateControl() does
* half the work.
*
* Arguments:
* PWINDOWCLASSDESC pwcd - Window class structure. Describes the
* type of control to add.
* LPTSTR pszText - Text for the new control.
* DWORD style - Style of the new control.
* DWORD flExtStyle - Extended style of the new control.
* INT id - ID for the new control.
* INT x - X location of the new control.
* INT y - Y location of the new control.
* INT cx - Width of the new control.
* INT cy - Height of the new control.
* LPTSTR pszDlgName - For dialogs, has dialog name.
* PDIALOGINFO pdi - Ptr to additional dialog info (NULL for controls).
*
* Returns:
* A pointer to the CTYPE structure for the new control.
* NULL if it couldn't create the control.
*
************************************************************************/
NPCTYPE AddControl(
PWINDOWCLASSDESC pwcd,
LPTSTR pszText,
DWORD style,
DWORD flExtStyle,
INT id,
INT x,
INT y,
INT cx,
INT cy,
LPTSTR pszDlgName,
PDIALOGINFO pdi)
{
NPCTYPE npcNew;
NPCTYPE npcT;
NPCTYPE *npnpcLast;
HWND hwndBehind;
if (!(npcNew = (NPCTYPE)MyAlloc(sizeof(CTYPE))))
return NULL;
/*
* These are checked later if a failure occurs,
* so we null them out now.
*/
npcNew->hwnd = NULL;
npcNew->hwndDrag = NULL;
npcNew->text = NULL;
/*
* Set up some fields and create the control.
*/
npcNew->npcNext = NULL;
npcNew->pwcd = pwcd;
npcNew->fSelected = FALSE;
SetRect(&npcNew->rc, x, y, x + cx, y + cy);
if (pwcd->iType == W_DIALOG)
hwndBehind = (HWND)NULL;
else
hwndBehind = (HWND)1;
if (!CreateControl(npcNew, pszText, style, flExtStyle, id, &npcNew->rc,
hwndBehind, pdi))
goto CreateFailed;
/*
* Create the drag window, unless this is the dialog.
*/
if (pwcd->iType != W_DIALOG) {
npcNew->hwndDrag = CreateWindow(
szDragClass,
NULL,
WS_CHILD,
0, 0, 0, 0,
gcd.npc->hwnd,
NULL,
ghInst,
NULL);
/*
* Store the CTYPE pointer into the control's drag window.
* This will be used by PCFROMHWND later.
*/
SETPCINTOHWND(npcNew->hwndDrag, npcNew);
/*
* Move the drag window to the top of the Z-Order.
*/
SetWindowPos(npcNew->hwndDrag, NULL, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOREDRAW);
SizeDragToControl(npcNew);
}
/*
* Did we just create a dialog?
*/
if (pwcd->iType == W_DIALOG) {
/*
* First, copy the new name (it can be an ordinal!).
*/
if (!(gcd.pszDlgName = MyAlloc(NameOrdLen(pszDlgName))))
goto CreateFailed;
NameOrdCpy(gcd.pszDlgName, pszDlgName);
/*
* Now, setup some other globals. We clear the gcd.prl pointer,
* because we are assuming that this dialog was not created
* from a res link (it was dropped instead). The routines
* that call AddControl when creating a dialog from a res
* link are responsible for setting this global later.
*/
gcd.prl = NULL;
gcd.npc = npcNew;
gfEditingDlg = TRUE;
}
else {
/*
* Search for the last control in the list.
*/
npnpcLast = &npcHead;
for (npcT = npcHead; npcT; npcT = npcT->npcNext)
npnpcLast = &npcT->npcNext;
/*
* Link in the new control at the end of the list.
*/
*npnpcLast = npcNew;
cWindows++;
}
return npcNew;
CreateFailed:
FreeCTYPE(npcNew);
return NULL;
}
/************************************************************************
* CreateControl
*
* Creates a control. Some styles may be masked off of the actual
* control created. This function can also create the dialog box.
*
* If the control created is the dialog box, it will not be made visible.
* This must be done by the caller. This allows the caller to first add
* all the controls to the dialog before showing it.
*
* The x, y, cx and cy coordinates are all in dialog units. For a
* type of W_DIALOG, this will be relative to the apps client. For a
* control, this will be relative to the "client" area of the dialog.
*
* Arguments:
* NPCTYPE npc - The CTYPE pointer to the new control. The hwnd
* fields of the npc will be set.
* LPTSTR pszText - The window text.
* DWORD flStyle - The style to use.
* DWORD flExtStyle - Extended style of the new control.
* INT id - ID for the control.
* PRECT prc - The size and location of the new control.
* HWND hwndBehind - Put new control behind this hwnd in Z-order.
* PDIALOGINFO pdi - Pointer to additional dialog info (NULL for controls).
*
* Returns:
* Handle of the control created.
* NULL if control was not created.
*
************************************************************************/
HWND CreateControl(
NPCTYPE npc,
LPTSTR pszText,
DWORD flStyle,
DWORD flExtStyle,
INT id,
PRECT prc,
HWND hwndBehind,
PDIALOGINFO pdi)
{
HWND hwnd;
HWND hwndChild;
WNDPROC lpfnChild;
RECT rcT;
TEXTMETRIC tm;
LPTSTR pszCreateClass;
LPTSTR pszTextOld;
INT iType = npc->pwcd->iType;
/*
* Set the text field. Remember that it can be an ordinal
* (for icon controls).
*/
pszTextOld = npc->text;
if (pszText && *pszText) {
if (!(npc->text = MyAlloc(NameOrdLen(pszText))))
return NULL;
NameOrdCpy(npc->text, pszText);
}
else {
npc->text = NULL;
}
/*
* If there was text before on this control, free it now.
* This should be done after the new text is allocated and
* copied, because it is common to pass this routine the same
* pointer, and we don't want to free the text before we have
* copied it!
*/
if (pszTextOld)
MyFree(pszTextOld);
/*
* Also set some other values in the CTYPE structure.
*/
npc->id = id;
npc->flStyle = flStyle;
npc->flExtStyle = flExtStyle;
/*
* If this is a dialog and it has the WS_CHILD style, remove
* it and make it WS_POPUP instead. This prevents some problems
* when editing the dialog.
*/
if (iType == W_DIALOG && (flStyle & WS_CHILD)) {
flStyle &= ~WS_CHILD;
flStyle |= WS_POPUP;
}
/*
* If this is an emulated custom control, we always make it with the
* default styles no matter what the user has specified. If not,
* remove any styles that can cause problems for a control of this
* type, such as OWNERDRAW styles.
*/
if (npc->pwcd->fEmulated)
flStyle = awcd[W_CUSTOM].flStyles;
else
flStyle &= ~npc->pwcd->flStylesBad;
if (iType == W_DIALOG) {
/*
* If the style includes the DS_MODALFRAME bit, set the appropriate
* extended style bit.
*/
if (flStyle & DS_MODALFRAME)
flExtStyle |= WS_EX_DLGMODALFRAME;
/*
* Create the dialog, but don't show it yet.
*/
hwnd = CreateWindowEx(
flExtStyle,
MAKEINTRESOURCE(DIALOGCLASS),
npc->text,
flStyle & ~WS_VISIBLE,
0, 0, 0, 0,
ghwndSubClient,
0,
ghInst,
NULL);
}
else {
/*
* Get the size of the control.
*/
rcT = *prc;
/*
* Map the dialog unit rectangle to window coords.
*/
DUToWinRect(&rcT);
/*
* If this is an icon, the text field is actually going
* to be an ordinal that has the resource id. We must map this to
* an id of our own or when we create the control it will cause a
* "Resource not found" error.
*/
if (iType == W_ICON)
pszText = (LPTSTR)&gordIcon;
else
pszText = npc->text;
/*
* Get the class name to use. In the case of custom controls,
* if the control is emulated, use the special emulator class.
* Otherwise, it is an installed custom control, and we can use
* it's real class string.
*/
if (iType == W_CUSTOM) {
if (npc->pwcd->fEmulated)
pszCreateClass = szCustomClass;
else
pszCreateClass = npc->pwcd->pszClass;
}
else {
pszCreateClass = ids(acsd[awcd[iType].iClass].idsClass);
}
/*
* Create the control. We always create it visible in work mode,
* even if the style says it isn't.
*/
hwnd = CreateWindowEx(
flExtStyle,
pszCreateClass,
pszText,
flStyle | WS_VISIBLE,
rcT.left, rcT.top,
rcT.right - rcT.left,
rcT.bottom - rcT.top,
gcd.npc->hwnd,
0,
ghInst,
NULL);
}
if (!hwnd) {
Message(MSG_CREATECTRLERROR, pszCreateClass);
return NULL;
}
if (iType == W_DIALOG) {
/*
* Did they specify a font?
*/
if (*pdi->szFontName) {
gcd.hFont = CreateDlgFont(hwnd, pdi->szFontName, pdi->nPointSize);
lstrcpy(gcd.di.szFontName, pdi->szFontName);
gcd.di.nPointSize = pdi->nPointSize;
gcd.fFontSpecified = TRUE;
}
else {
gcd.hFont = NULL;
*gcd.di.szFontName = CHAR_NULL;
gcd.di.nPointSize = 0;
gcd.fFontSpecified = FALSE;
}
/*
* Get the dimensions of the font. It is a possible case that
* they specified a font but it could not be created, so in
* that case we use the system font as well as if they didn't
* specify a font at all.
*/
if (gcd.hFont) {
gcd.cxChar = MyGetCharDimensions(hwnd, gcd.hFont, &tm);
gcd.cyChar = tm.tmHeight;
}
else {
gcd.cxChar = gcxSysChar;
gcd.cyChar = gcySysChar;
}
/*
* Now that we know what font we are using, adjust some entries
* in the awcd (array of window class data) table for default
* sizing of controls.
*/
AdjustDefaultSizes();
}
/*
* If there is a valid user specified font, inform the control
* of it. Once the font has been set into the dialog, it
* must not be destroyed, because the dialog window will
* clean it up when it is destroyed.
*/
if (gcd.hFont)
SendMessage(hwnd, WM_SETFONT, (WPARAM)gcd.hFont, 0L);
/*
* Move the window into the requested Z-Order.
*/
SetWindowPos(hwnd, hwndBehind, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOREDRAW);
/*
* Store the CTYPE pointer into the control's hwnd.
* This will be used by PCFROMHWND later.
*/
SETPCINTOHWND(hwnd, npc);
/*
* Subclass the control.
*/
npc->pwcd->pfnOldWndProc =
(WNDPROC)SetWindowLong(hwnd, GWL_WNDPROC,
(iType == W_DIALOG) ? (DWORD)DialogCtrlWndProc :
(DWORD)CtrlWndProc);
/*
* Be sure double-clicks are enabled for this control.
*/
(UINT)SetClassLong((hwnd), GCL_STYLE, (LONG)((UINT)GetClassLong((hwnd), GCL_STYLE) | CS_DBLCLKS));
/*
* Subclass any children this control may have.
*/
for (hwndChild = GetTopWindow(hwnd); hwndChild;
hwndChild = GetNextWindow(hwndChild, GW_HWNDNEXT)) {
lpfnChild = (WNDPROC)SetWindowLong(hwndChild,
GWL_WNDPROC, (DWORD)ChildWndProc);
SETCHILDPROC(hwndChild, lpfnChild);
}
/*
* Did we just create a dialog?
*/
if (iType == W_DIALOG) {
/*
* Now that the dialog is created, we can figure out how to
* size it. We start by mapping the dialog units to window
* coordinates,
*/
rcT = *prc;
DUToWinRect(&rcT);
/*
* We now have the rectangle for the client area. Expand it
* to account for the frame controls.
*/
AdjustWindowRectEx(&rcT, flStyle, FALSE, flExtStyle);
/*
* Now we can map the rect from the apps client area
* to the desktop, then we set the dialogs position.
*/
ClientToScreenRect(ghwndSubClient, &rcT);
SetWindowPos(hwnd, NULL,
rcT.left, rcT.top,
rcT.right - rcT.left, rcT.bottom - rcT.top,
SWP_NOZORDER | SWP_NOACTIVATE);
SaveDlgClientRect(hwnd);
/*
* Save the class name, if any.
*/
if (pdi->pszClass && *pdi->pszClass) {
if (!(gcd.di.pszClass = MyAlloc(NameOrdLen(pdi->pszClass)))) {
DestroyWindow(hwnd);
return (HWND)NULL;
}
NameOrdCpy(gcd.di.pszClass, pdi->pszClass);
}
else {
gcd.di.pszClass = NULL;
}
/*
* Save the menu name, if any.
*/
if (pdi->pszMenu && *pdi->pszMenu) {
if (!(gcd.di.pszMenu = MyAlloc(NameOrdLen(pdi->pszMenu)))) {
DestroyWindow(hwnd);
return (HWND)NULL;
}
NameOrdCpy(gcd.di.pszMenu, pdi->pszMenu);
}
else {
gcd.di.pszMenu = NULL;
}
/*
* Set some other fields in the additional dialog info structure.
*/
gcd.di.fResFlags = pdi->fResFlags;
gcd.di.wLanguage = pdi->wLanguage;
gcd.di.DataVersion = pdi->DataVersion;
gcd.di.Version = pdi->Version;
gcd.di.Characteristics = pdi->Characteristics;
}
npc->hwnd = hwnd;
return hwnd;
}
/************************************************************************
* CreateDlgFont
*
* This function creates a font with the given face name and point size
* and returns a handle to it.
*
* Arguments:
* HWND hwnd - Dialog window handle.
* LPTSTR pszFontName - Name of the font (for example: "Helv").
* INT nPointSize - Point size of the font (for example: 8 or 12).
*
* Returns:
* A handle to the created font, or NULL if it could not be created.
*
************************************************************************/
STATICFN HFONT CreateDlgFont(
HWND hwnd,
LPTSTR pszFontName,
INT nPointSize)
{
HFONT hFont;
HFONT hFontOld;
HDC hDC;
LOGFONT lf;
TCHAR szFaceName[LF_FACESIZE];
/*
* Initialize the logical font structure. Note that filling the
* structure with zeros gives it all the default settings.
*/
memset(&lf, 0, sizeof(LOGFONT));
lf.lfHeight = (SHORT)-PointSizeToPixels(nPointSize);
lf.lfWeight = FW_BOLD;
lstrcpy(lf.lfFaceName, pszFontName);
if (!(hFont = CreateFontIndirect(&lf)))
return NULL;
/*
* If we didn't get the face name that was requested, delete the
* new font and return NULL. This will effectively select the
* system font for this dialog.
*/
hDC = GetDC(hwnd);
if (hFontOld = SelectObject(hDC, hFont)) {
GetTextFace(hDC, LF_FACESIZE, szFaceName);
SelectObject(hDC, hFontOld);
if (lstrcmpi(szFaceName, pszFontName) != 0) {
DeleteObject(hFont);
hFont = NULL;
}
}
else {
DeleteObject(hFont);
hFont = NULL;
}
ReleaseDC(hwnd, hDC);
return hFont;
}
/************************************************************************
* MyGetCharDimensions
*
* This function calculates the average character width of the given
* font for the given window. This must be used instead of
* simply using the tmAveCharWidth field of the text metrics, because
* this value is not correct for proportional fonts.
*
* Arguments:
* HWND hwnd - The window handle.
* HFONT hFont - The font handle.
* PTEXTMETRIC ptm - Where to return the text metrics.
*
* Returns:
* The average character width. The text metrics are returned in
* the TEXTMETRIC structure pointed to by ptm.
*
************************************************************************/
STATICFN INT MyGetCharDimensions(
HWND hwnd,
HFONT hFont,
PTEXTMETRIC ptm)
{
register INT i;
HDC hDC;
SIZE size;
INT iWidth;
TCHAR szAveCharWidth[52];
HFONT hFontOld;
hDC = GetDC(hwnd);
hFontOld = SelectObject(hDC, hFont);
GetTextMetrics(hDC, ptm);
/*
* Is this a variable pitch font?
*/
if (ptm->tmPitchAndFamily & 0x01) {
for (i = 0; i < 26; i++)
szAveCharWidth[i] = (TCHAR)(i + CHAR_A);
for (i = 0; i < 26; i++)
szAveCharWidth[i + 26] = (TCHAR)(i + CHAR_CAP_A);
GetTextExtentPoint(hDC, szAveCharWidth, 52, &size);
iWidth = (INT)size.cx / 26;
//
// Round it up.
//
iWidth = (iWidth + 1) / 2;
}
else {
iWidth = ptm->tmAveCharWidth;
}
SelectObject(hDC, hFontOld);
ReleaseDC(hwnd, hDC);
return iWidth;
}
/************************************************************************
* AdjustDefaultSizes
*
* This functions adjusts some default size entries in the awcd (array of
* window class data) table.
* This must be done at run time, because the actual values depend on the
* system that dlgedit is being run on and the font of the current dialog.
*
* This function should be called any time that a dialog is created,
* or its font is changed.
*
************************************************************************/
STATICFN VOID AdjustDefaultSizes(VOID)
{
awcd[W_ICON].cxDefault =
(((GetSystemMetrics(SM_CXICON) * 4) * 2) + gcd.cxChar)
/ (gcd.cxChar * 2);
awcd[W_ICON].cyDefault =
(((GetSystemMetrics(SM_CYICON) * 8) * 2) + gcd.cyChar)
/ (gcd.cyChar * 2);
awcd[W_VERTSCROLL].cxDefault =
(((GetSystemMetrics(SM_CXVSCROLL) * 4) * 2) + gcd.cxChar)
/ (gcd.cxChar * 2);
awcd[W_HORZSCROLL].cyDefault =
(((GetSystemMetrics(SM_CYHSCROLL) * 8) * 2) + gcd.cyChar)
/ (gcd.cyChar * 2);
}
/************************************************************************
* DeleteControl
*
* This deletes all selected controls from the dialog being edited
* (or the dialog itself, if it is selected).
*
************************************************************************/
VOID DeleteControl(VOID)
{
if (gfDlgSelected) {
if (Message(MSG_DELETEDIALOG) == IDYES)
/*
* Delete the dialog, including the resource for it.
*/
DeleteDialog(TRUE);
}
else {
while (gnpcSel)
DeleteControl2(gnpcSel);
gfDlgChanged = TRUE;
}
gfResChged = TRUE;
ShowFileStatus(FALSE);
StatusUpdate();
StatusSetEnable();
}
/************************************************************************
* DeleteControl2
*
* This deletes a control by destroying its window and removing it
* from the linked list of controls associated with the dialog box.
* The control is destroyed and the window is unlinked and the CTYPE free'd.
*
************************************************************************/
STATICFN VOID DeleteControl2(
NPCTYPE npcDel)
{
register NPCTYPE npcT;
register NPCTYPE *npnpcLast;
UnSelectControl(npcDel);
/*
* Search for the control, unlink it from the list and free it.
*/
npcT = npcHead;
npnpcLast = &npcHead;
while (npcT) {
if (npcT == npcDel) {
*npnpcLast = npcT->npcNext;
FreeCTYPE(npcT);
cWindows--;
break;
}
npnpcLast = &npcT->npcNext;
npcT = npcT->npcNext;
}
}
/************************************************************************
* DeleteDialog
*
* This deletes the dialog box being worked on and sets globals
* and the Status Window appropriately. All CTYPEs are freed, the
* status window is updated and the dialog window is destroyed.
*
* Arguments:
* BOOL fResAlso - If TRUE, delete the dialog resource also.
*
************************************************************************/
VOID DeleteDialog(
BOOL fResAlso)
{
register NPCTYPE npcT;
register NPCTYPE npcNext;
CancelSelection(FALSE);
/*
* If they requested that the dialog resource be deleted also,
* do it first while some globals are still set.
*/
if (fResAlso)
DeleteDialogResource();
/*
* Hide the window for better painting speed.
*/
ShowWindow(gcd.npc->hwnd, SW_HIDE);
/*
* Free all the controls.
*/
npcT = npcHead;
while (npcT) {
npcNext = npcT->npcNext;
FreeCTYPE(npcT);
npcT = npcNext;
}
npcHead = NULL;
cWindows = 0;
/*
* Free the dialog itself.
*/
FreeCTYPE(gcd.npc);
if (gcd.pszDlgName) {
MyFree(gcd.pszDlgName);
gcd.pszDlgName = NULL;
}
if (gcd.di.pszClass) {
MyFree(gcd.di.pszClass);
gcd.di.pszClass = NULL;
}
if (gcd.di.pszMenu) {
MyFree(gcd.di.pszMenu);
gcd.di.pszMenu = NULL;
}
if (gcd.hFont) {
DeleteObject(gcd.hFont);
gcd.hFont = NULL;
}
gcd.fFontSpecified = FALSE;
*gcd.di.szFontName = CHAR_NULL;
/*
* Set these globals back to the system font values so that
* workers like WinToDUPoint will still work.
*/
gcd.cxChar = gcxSysChar;
gcd.cyChar = gcySysChar;
gcd.prl = NULL;
gcd.npc = NULL;
gfEditingDlg = FALSE;
gfDlgChanged = FALSE;
ToolboxSelectTool(W_NOTHING, FALSE);
StatusUpdate();
StatusSetEnable();
}
/************************************************************************
* FreeCTYPE
*
* This function frees an allocated CTYPE. The associated control or
* dialog window is destroyed, and memory for the text and/or class
* is freed, followed by freeing the actual CTYPE structure itself.
*
* If the hwnd in the CTYPE is NULL, only the text (if not NULL) is
* assumed to be valid and will be freed, followed by the CTYPE structure
* itself. This allows FreeCTYPE to be called when the CTYPE is only
* partially initialized. This is a little dependant on the order that
* a CTYPE is allocated and initialized in AddControl().
*
* Arguments:
* NPCTYPE npc = The CTYPE to free.
*
************************************************************************/
STATICFN VOID FreeCTYPE(
NPCTYPE npc)
{
if (npc->hwnd)
DestroyWindow(npc->hwnd);
if (npc->hwndDrag)
DestroyWindow(npc->hwndDrag);
if (npc->text)
MyFree(npc->text);
MyFree(npc);
}
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