Added Windows message box implementation, but it needs a little work …

…on layout.
libsdl-org · Oct 31, 2012 · adae3e0 · adae3e0
1 parent 963df1b
commit adae3e0
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diff --git a/VisualC/SDL/SDL_VS2008.vcproj b/VisualC/SDL/SDL_VS2008.vcproj
@@ -1216,6 +1216,14 @@
 			RelativePath="..\..\src\video\windows\SDL_windowskeyboard.h"
 			>
 		</File>
+		<File
+			RelativePath="..\..\src\video\windows\SDL_windowsmessagebox.c"
+			>
+		</File>
+		<File
+			RelativePath="..\..\src\video\windows\SDL_windowsmessagebox.h"
+			>
+		</File>
 		<File
 			RelativePath="..\..\src\video\windows\SDL_windowsmodes.c"
 			>

diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
@@ -2841,6 +2841,9 @@ SDL_IsScreenKeyboardShown(SDL_Window *window)
     return SDL_FALSE;
 }
 
+#if SDL_VIDEO_DRIVER_WINDOWS
+#include "windows/SDL_windowsmessagebox.h"
+#endif
 #if SDL_VIDEO_DRIVER_COCOA
 #include "cocoa/SDL_cocoamessagebox.h"
 #endif
@@ -2866,6 +2869,11 @@ SDL_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
     }
 
     /* It's completely fine to call this function before video is initialized */
+#if SDL_VIDEO_DRIVER_WINDOWS
+    if (WIN_ShowMessageBox(messageboxdata, buttonid) == 0) {
+        return 0;
+    }
+#endif
 #if SDL_VIDEO_DRIVER_COCOA
     if (Cocoa_ShowMessageBox(messageboxdata, buttonid) == 0) {
         return 0;

diff --git a/src/video/windows/SDL_windowsmessagebox.c b/src/video/windows/SDL_windowsmessagebox.c
@@ -0,0 +1,282 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+#if SDL_VIDEO_DRIVER_WINDOWS
+
+#include "SDL.h"
+#include "SDL_windowsvideo.h"
+
+
+/* Display a Windows message box */
+
+typedef struct
+{
+    LPDLGTEMPLATE lpDialog;
+    Uint8 *data;
+    size_t size;
+    size_t used;
+} WIN_DialogData;
+
+
+static INT_PTR MessageBoxDialogProc(HWND hDlg, UINT iMessage, WPARAM wParam, LPARAM lParam)
+{
+    switch ( iMessage ) {
+    case WM_COMMAND:
+        /* Return the ID of the button that was pushed */
+		EndDialog(hDlg, LOWORD(wParam));
+        return TRUE;
+
+    default:
+        break;
+    }
+    return FALSE;
+}
+
+static SDL_bool ExpandDialogSpace(WIN_DialogData *dialog, size_t space)
+{
+    size_t size = dialog->size;
+
+    if (size == 0) {
+        size = space;
+    } else {
+        while ((dialog->used + space) > size) {
+            size *= 2;
+        }
+    }
+    if (size > dialog->size) {
+        void *data = SDL_realloc(dialog->data, size);
+        if (!data) {
+            SDL_OutOfMemory();
+            return SDL_FALSE;
+        }
+        dialog->data = data;
+        dialog->size = size;
+        dialog->lpDialog = (LPDLGTEMPLATE)dialog->data;
+    }
+    return SDL_TRUE;
+}
+
+static SDL_bool AlignDialogData(WIN_DialogData *dialog, size_t size)
+{
+    size_t padding = (dialog->used % size);
+
+    if (!ExpandDialogSpace(dialog, padding)) {
+        return SDL_FALSE;
+    }
+
+    dialog->used += padding;
+
+    return SDL_TRUE;
+}
+
+static SDL_bool AddDialogData(WIN_DialogData *dialog, const void *data, size_t size)
+{
+    if (!ExpandDialogSpace(dialog, size)) {
+        return SDL_FALSE;
+    }
+
+    SDL_memcpy(dialog->data+dialog->used, data, size);
+    dialog->used += size;
+
+    return SDL_TRUE;
+}
+
+static SDL_bool AddDialogString(WIN_DialogData *dialog, const char *string)
+{
+    WCHAR *wstring;
+    WCHAR *p;
+    size_t count;
+    SDL_bool status;
+
+    if (!string) {
+        string = "";
+    }
+
+    wstring = WIN_UTF8ToString(string);
+    if (!wstring) {
+        return SDL_FALSE;
+    }
+
+    /* Find out how many characters we have, including null terminator */
+    count = 0;
+    for (p = wstring; *p; ++p) {
+        ++count;
+    }
+    ++count;
+
+    status = AddDialogData(dialog, wstring, count*sizeof(WCHAR));
+    SDL_free(wstring);
+    return status;
+}
+
+static SDL_bool AddDialogControl(WIN_DialogData *dialog, WORD type, DWORD style, DWORD exStyle, int x, int y, int w, int h, int id, const char *caption)
+{
+    DLGITEMTEMPLATE item;
+    WORD marker = 0xFFFF;
+    WORD extraData = 0;
+
+    SDL_zero(item);
+    item.style = style;
+    item.dwExtendedStyle = exStyle;
+    item.x = x;
+    item.y = y;
+    item.cx = w;
+    item.cy = h;
+    item.id = id;
+
+    if (!AlignDialogData(dialog, sizeof(DWORD))) {
+        return SDL_FALSE;
+    }
+    if (!AddDialogData(dialog, &item, sizeof(item))) {
+        return SDL_FALSE;
+    }
+    if (!AddDialogData(dialog, &marker, sizeof(marker))) {
+        return SDL_FALSE;
+    }
+    if (!AddDialogData(dialog, &type, sizeof(type))) {
+        return SDL_FALSE;
+    }
+    if (!AddDialogString(dialog, caption)) {
+        return SDL_FALSE;
+    }
+    if (!AddDialogData(dialog, &extraData, sizeof(extraData))) {
+        return SDL_FALSE;
+    }
+    ++dialog->lpDialog->cdit;
+
+    return SDL_TRUE;
+}
+
+static SDL_bool AddDialogStatic(WIN_DialogData *dialog, int x, int y, int w, int h, const char *text)
+{
+    DWORD style = WS_VISIBLE | WS_CHILD | SS_LEFT | SS_NOPREFIX;
+    return AddDialogControl(dialog, 0x0082, style, 0, x, y, w, h, -1, text);
+}
+
+static SDL_bool AddDialogButton(WIN_DialogData *dialog, int x, int y, int w, int h, const char *text, int id, SDL_bool isDefault)
+{
+    DWORD style = WS_VISIBLE | WS_CHILD;
+    if (isDefault) {
+        style |= BS_DEFPUSHBUTTON;
+    } else {
+        style |= BS_PUSHBUTTON;
+    }
+    return AddDialogControl(dialog, 0x0080, style, 0, x, y, w, h, id, text);
+}
+
+static void FreeDialogData(WIN_DialogData *dialog)
+{
+    if (dialog->data) {
+        SDL_free(dialog->data);
+    }
+    SDL_free(dialog);
+}
+
+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;
+}
+
+#endif /* SDL_VIDEO_DRIVER_WINDOWS */
+
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/video/windows/SDL_windowsmessagebox.h b/src/video/windows/SDL_windowsmessagebox.h
@@ -0,0 +1,29 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2012 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+#if SDL_VIDEO_DRIVER_WINDOWS
+
+extern int WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid);
+
+#endif /* SDL_VIDEO_DRIVER_WINDOWS */
+
+/* vi: set ts=4 sw=4 expandtab: */