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windows: Message boxes use Task Dialogs if possible (thanks, Jack!).

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This lets the message box have an icon. Unless the app has opted-in to using
the v6 common controls, though, this will fall back to the usual SDL message
boxes.
This commit is contained in:
Ryan C. Gordon 2018-02-28 01:54:22 -05:00
parent 8536130aa2
commit a749035f10
2 changed files with 275 additions and 3 deletions
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122
src/video/windows/SDL_windowsmessagebox.c
View file

@ -26,7 +26,7 @@
#include "SDL_assert.h"
#include "SDL_windowsvideo.h"
#include "SDL_windowstaskdialog.h"
#ifndef SS_EDITCONTROL
#define SS_EDITCONTROL 0x2000
@ -341,8 +341,9 @@ static WIN_DialogData *CreateDialogData(int w, int h, const char *caption)
return dialog;
}
int
WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
/* This function is called if a Task Dialog is unsupported. */
static int
WIN_ShowOldMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
{
WIN_DialogData *dialog;
int i, x, y;
@ -491,6 +492,121 @@ WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
return 0;
}
/* TaskDialogIndirect procedure
* This is because SDL targets Windows XP (0x501), so this is not defined in the platform SDK.
*/
typedef HRESULT(FAR WINAPI *TASKDIALOGINDIRECTPROC)(_In_ const TASKDIALOGCONFIG *pTaskConfig, _Out_opt_ int *pnButton, _Out_opt_ int *pnRadioButton, _Out_opt_ BOOL *pfVerificationFlagChecked);
int
WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
{
HWND ParentWindow = NULL;
wchar_t *wmessage;
wchar_t *wtitle;
TASKDIALOGCONFIG TaskConfig;
TASKDIALOG_BUTTON *pButtons;
TASKDIALOG_BUTTON *pButton;
HMODULE hComctl32;
TASKDIALOGINDIRECTPROC pfnTaskDialogIndirect;
HRESULT hr;
int nButton;
int nCancelButton;
int i;
/* If we cannot load comctl32.dll use the old messagebox! */
hComctl32 = LoadLibrary(TEXT("Comctl32.dll"));
if (hComctl32 == NULL) {
return WIN_ShowOldMessageBox(messageboxdata,buttonid);
}
/* If TaskDialogIndirect doesn't exist use the old messagebox!
This will fail prior to Windows Vista.
The manifest file in the application may require targeting version 6 of comctl32.dll, even
when we use LoadLibrary here!
If you don't want to bother with manifests, put this #pragma in your app's source code somewhere:
pragma comment(linker,"\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
*/
pfnTaskDialogIndirect = (TASKDIALOGINDIRECTPROC) GetProcAddress(hComctl32, "TaskDialogIndirect");
if (pfnTaskDialogIndirect == NULL) {
FreeLibrary(hComctl32);
return WIN_ShowOldMessageBox(messageboxdata, buttonid);
}
/* If we have a parent window, get the Instance and HWND for them
so that our little dialog gets exclusive focus at all times. */
if (messageboxdata->window) {
ParentWindow = ((SDL_WindowData *) messageboxdata->window->driverdata)->hwnd;
}
wmessage = WIN_UTF8ToString(messageboxdata->message);
wtitle = WIN_UTF8ToString(messageboxdata->title);
SDL_zero(TaskConfig);
TaskConfig.cbSize = sizeof (TASKDIALOGCONFIG);
TaskConfig.hwndParent = ParentWindow;
TaskConfig.dwFlags = TDF_SIZE_TO_CONTENT;
TaskConfig.pszWindowTitle = wtitle;
if (messageboxdata->flags & SDL_MESSAGEBOX_ERROR) {
TaskConfig.pszMainIcon = TD_ERROR_ICON;
} else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) {
TaskConfig.pszMainIcon = TD_WARNING_ICON;
} else if (messageboxdata->flags & SDL_MESSAGEBOX_INFORMATION) {
TaskConfig.pszMainIcon = TD_INFORMATION_ICON;
} else {
TaskConfig.pszMainIcon = NULL;
}
TaskConfig.pszContent = wmessage;
TaskConfig.cButtons = messageboxdata->numbuttons;
pButtons = SDL_malloc(sizeof (TASKDIALOG_BUTTON) * messageboxdata->numbuttons);
TaskConfig.nDefaultButton = 0;
for (i = 0; i < messageboxdata->numbuttons; i++)
{
pButton = &pButtons[messageboxdata->numbuttons-1-i];
if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) {
nCancelButton = messageboxdata->buttons[i].buttonid;
pButton->nButtonID = 2;
} else {
pButton->nButtonID = messageboxdata->buttons[i].buttonid + 1;
if (pButton->nButtonID >= 2) {
pButton->nButtonID++;
}
}
pButton->pszButtonText = WIN_UTF8ToString(messageboxdata->buttons[i].text);
if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) {
TaskConfig.nDefaultButton = pButton->nButtonID;
}
}
TaskConfig.pButtons = pButtons;
/* Show the Task Dialog */
hr = pfnTaskDialogIndirect(&TaskConfig, &nButton, NULL, NULL);
/* Free everything */
FreeLibrary(hComctl32);
SDL_free(wmessage);
SDL_free(wtitle);
for (i = 0; i < messageboxdata->numbuttons; i++) {
SDL_free((wchar_t *) pButtons[i].pszButtonText);
}
SDL_free(pButtons);
/* Check the Task Dialog was successful and give the result */
if (SUCCEEDED(hr)) {
if (nButton == 2) {
*buttonid = nCancelButton;
} else if (nButton > 2) {
*buttonid = nButton-1-1;
} else {
*buttonid = nButton-1;
}
return 0;
}
/* We failed showing the Task Dialog, use the old message box! */
return WIN_ShowOldMessageBox(messageboxdata, buttonid);
}
#endif /* SDL_VIDEO_DRIVER_WINDOWS */
/* vi: set ts=4 sw=4 expandtab: */