static WIN_DialogData *CreateDialogData(int w, int h, const char *caption)
{
WIN_DialogData *dialog;
DLGTEMPLATE dialogTemplate;
SDL_zero(dialogTemplate);
dialogTemplate.style = (WS_CAPTION | DS_CENTER);
dialogTemplate.x = 0;
dialogTemplate.y = 0;
dialogTemplate.cx = w;
dialogTemplate.cy = h;
dialog = (WIN_DialogData *)SDL_calloc(1, sizeof(*dialog));
if (!dialog) {
return NULL;
}
if (!AddDialogData(dialog, &dialogTemplate, sizeof(dialogTemplate))) {
FreeDialogData(dialog);
return NULL;
}
/* There is no menu or special class */
if (!AddDialogString(dialog, "") || !AddDialogString(dialog, "")) {
FreeDialogData(dialog);
return NULL;
}
if (!AddDialogString(dialog, caption)) {
FreeDialogData(dialog);
return NULL;
}
return dialog;
}
int
WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
{
WIN_DialogData *dialog;
int i, x, y, w, h, gap, which;
const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
/* FIXME: Need a better algorithm for laying out the message box */
dialog = CreateDialogData(570, 260, messageboxdata->title);
if (!dialog) {
return -1;
}
w = 100;
h = 25;
gap = 10;
x = gap;
y = 50;
if (!AddDialogStatic(dialog, x, y, 550, 100, messageboxdata->message)) {
FreeDialogData(dialog);
return -1;
}
y += 110;
for (i = 0; i < messageboxdata->numbuttons; ++i) {
SDL_bool isDefault;
if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
isDefault = SDL_TRUE;
} else {
isDefault = SDL_FALSE;
}
if (!AddDialogButton(dialog, x, y, w, h, buttons[i].text, i, isDefault)) {
FreeDialogData(dialog);
return -1;
}
x += w + gap;
}
/* FIXME: If we have a parent window, get the Instance and HWND for them */
which = DialogBoxIndirect(NULL, dialog->lpDialog, NULL, (DLGPROC)MessageBoxDialogProc);
*buttonid = buttons[which].buttonid;
FreeDialogData(dialog);
return 0;
}
int
WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
{
WIN_DialogData *dialog;
int i, x, y;
UINT_PTR which;
const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons;
HFONT DialogFont;
SIZE Size;
RECT TextSize;
wchar_t* wmessage;
TEXTMETRIC TM;
const int ButtonWidth = 88;
const int ButtonHeight = 26;
const int TextMargin = 16;
const int ButtonMargin = 12;
/* Jan 25th, 2013 - [email protected]
*
*
* I've tried to make this more reasonable, but I've run in to a lot
* of nonsense.
*
* The original issue is the code was written in pixels and not
* dialog units (DLUs). All DialogBox functions use DLUs, which
* vary based on the selected font (yay).
*
* According to MSDN, the most reliable way to convert is via
* MapDialogUnits, which requires an HWND, which we don't have
* at time of template creation.
*
* We do however have:
* The system font (DLU width 8 for me)
* The font we select for the dialog (DLU width 6 for me)
*
* Based on experimentation, *neither* of these return the value
* actually used. Stepping in to MapDialogUnits(), the conversion
* is fairly clear, and uses 7 for me.
*
* As a result, some of this is hacky to ensure the sizing is
* somewhat correct.
*
* Honestly, a long term solution is to use CreateWindow, not CreateDialog.
*
*
* In order to get text dimensions we need to have a DC with the desired font.
* I'm assuming a dialog box in SDL is rare enough we can to the create.
*/
HDC FontDC = CreateCompatibleDC(0);
{
/* Create a duplicate of the font used in system message boxes. */
LOGFONT lf;
NONCLIENTMETRICS NCM;
NCM.cbSize = sizeof(NCM);
SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &NCM, 0);
lf = NCM.lfMessageFont;
DialogFont = CreateFontIndirect(&lf);
}
/* Select the font in to our DC */
SelectObject(FontDC, DialogFont);
{
/* Get the metrics to try and figure our DLU conversion. */
GetTextMetrics(FontDC, &TM);
s_BaseUnitsX = TM.tmAveCharWidth + 1;
s_BaseUnitsY = TM.tmHeight;
}
/* Measure the *pixel* size of the string. */
wmessage = WIN_UTF8ToString(messageboxdata->message);
SDL_zero(TextSize);
Size.cx = DrawText(FontDC, wmessage, -1, &TextSize, DT_CALCRECT);
/* Add some padding for hangs, etc. */
TextSize.right += 2;
TextSize.bottom += 2;
/* Done with the DC, and the string */
DeleteDC(FontDC);
SDL_free(wmessage);
/* Increase the size of the dialog by some border spacing around the text. */
Size.cx = TextSize.right - TextSize.left;
Size.cy = TextSize.bottom - TextSize.top;
Size.cx += TextMargin * 2;
Size.cy += TextMargin * 2;
/* Ensure the size is wide enough for all of the buttons. */
if (Size.cx < messageboxdata->numbuttons * (ButtonWidth + ButtonMargin) + ButtonMargin)
Size.cx = messageboxdata->numbuttons * (ButtonWidth + ButtonMargin) + ButtonMargin;
/* Add vertical space for the buttons and border. */
Size.cy += ButtonHeight + TextMargin;
dialog = CreateDialogData(Size.cx, Size.cy, messageboxdata->title);
if (!dialog) {
return -1;
}
if (!AddDialogStatic(dialog, TextMargin, TextMargin, TextSize.right - TextSize.left, TextSize.bottom - TextSize.top, messageboxdata->message)) {
FreeDialogData(dialog);
return -1;
}
/* Align the buttons to the right/bottom. */
x = Size.cx - (ButtonWidth + ButtonMargin) * messageboxdata->numbuttons;
y = Size.cy - ButtonHeight - ButtonMargin;
for (i = messageboxdata->numbuttons - 1; i >= 0; --i) {
SDL_bool isDefault;
if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
isDefault = SDL_TRUE;
} else {
isDefault = SDL_FALSE;
}
if (!AddDialogButton(dialog, x, y, ButtonWidth, ButtonHeight, buttons[i].text, i, isDefault)) {
FreeDialogData(dialog);
return -1;
}
x += ButtonWidth + ButtonMargin;
}
/* FIXME: If we have a parent window, get the Instance and HWND for them */
which = DialogBoxIndirect(NULL, (DLGTEMPLATE*)dialog->lpDialog, NULL, (DLGPROC)MessageBoxDialogProc);
*buttonid = buttons[which].buttonid;
FreeDialogData(dialog);
return 0;
}
static WIN_DialogData *CreateDialogData(int w, int h, const char *caption)
{
WIN_DialogData *dialog;
DLGTEMPLATEEX dialogTemplate;
WORD WordToPass;
SDL_zero(dialogTemplate);
dialogTemplate.dlgVer = 1;
dialogTemplate.signature = 0xffff;
dialogTemplate.style = (WS_CAPTION | DS_CENTER | DS_SHELLFONT);
dialogTemplate.x = 0;
dialogTemplate.y = 0;
dialogTemplate.cx = w;
dialogTemplate.cy = h;
Vec2ToDLU(&dialogTemplate.cx, &dialogTemplate.cy);
dialog = (WIN_DialogData *)SDL_calloc(1, sizeof(*dialog));
if (!dialog) {
return NULL;
}
if (!AddDialogData(dialog, &dialogTemplate, sizeof(dialogTemplate))) {
FreeDialogData(dialog);
return NULL;
}
/* No menu */
WordToPass = 0;
if (!AddDialogData(dialog, &WordToPass, 2)) {
FreeDialogData(dialog);
return NULL;
}
/* No custom class */
if (!AddDialogData(dialog, &WordToPass, 2)) {
FreeDialogData(dialog);
return NULL;
}
/* title */
if (!AddDialogString(dialog, caption)) {
FreeDialogData(dialog);
return NULL;
}
/* Font stuff */
{
/*
* We want to use the system messagebox font.
*/
BYTE ToPass;
NONCLIENTMETRICSA NCM;
NCM.cbSize = sizeof(NCM);
SystemParametersInfoA(SPI_GETNONCLIENTMETRICS, 0, &NCM, 0);
/* Font size - convert to logical font size for dialog parameter. */
{
HDC ScreenDC = GetDC(NULL);
int LogicalPixelsY = GetDeviceCaps(ScreenDC, LOGPIXELSY);
if (!LogicalPixelsY) /* This can happen if the application runs out of GDI handles */
LogicalPixelsY = 72;
WordToPass = (WORD)(-72 * NCM.lfMessageFont.lfHeight / LogicalPixelsY);
ReleaseDC(NULL, ScreenDC);
}
if (!AddDialogData(dialog, &WordToPass, 2)) {
FreeDialogData(dialog);
return NULL;
}
/* Font weight */
WordToPass = (WORD)NCM.lfMessageFont.lfWeight;
if (!AddDialogData(dialog, &WordToPass, 2)) {
FreeDialogData(dialog);
return NULL;
}
/* italic? */
ToPass = NCM.lfMessageFont.lfItalic;
if (!AddDialogData(dialog, &ToPass, 1)) {
FreeDialogData(dialog);
return NULL;
}
/* charset? */
ToPass = NCM.lfMessageFont.lfCharSet;
if (!AddDialogData(dialog, &ToPass, 1)) {
FreeDialogData(dialog);
return NULL;
}
/* font typeface. */
if (!AddDialogString(dialog, NCM.lfMessageFont.lfFaceName)) {
FreeDialogData(dialog);
return NULL;
}
}
return dialog;
}
