From 9251e89359ce46d08c0924b09d48fedbdf2c95fb Mon Sep 17 00:00:00 2001
From: Jonas Kümmerlin <jonas@kuemmerlin.eu>
Date: Sun, 31 May 2020 01:49:11 +0200
Subject: ALFApplication and multiple toplevels support

---
 alf/alf.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

(limited to 'alf/alf.h')

diff --git a/alf/alf.h b/alf/alf.h
index 6f42f35..cc1d936 100644
--- a/alf/alf.h
+++ b/alf/alf.h
@@ -80,6 +80,7 @@ typedef struct {
 #define ALF_WM_SETMODALRESULT   (ALF_WM__BASE + 7)
 #define ALF_WM_GETMODALRESULT   (ALF_WM__BASE + 8)
 #define ALF_WM_GETDPI           (ALF_WM__BASE + 9)
+#define ALF_WM_GETAPPLICATION   (ALF_WM__BASE + 10)
 #define ALF_WM_BACKGROUNDCHANGE (ALF_WM__BASE + 11)
 #define ALF_WM_APPLYSIZE        (ALF_WM__BASE + 12)
 #define ALF_WM_SETBGCOLOR       (ALF_WM__BASE + 13)
@@ -301,10 +302,58 @@ ALF_FillRect(HDC dc, const RECT *rc, ALFColor color);
 void
 ALF_DestroyWidget(HWND win, WORD id);
 
+
+// application
+
+// an application is a container for multiple top-level windows
+// NOTE: ALFApplication is not thread-safe. It must be accessed only from the
+// thread that created it, and all toplevels associated with the application
+// must live on that same thread.
+
+typedef struct tagALFApplication ALFApplication;
+
+ALFApplication *
+ALF_CreateApplication(void);
+
+void
+ALF_Application_ProcessMessages(ALFApplication *app);
+
+// continuously processes messages until a quit message is posted
+// or all windows have been destroyed
+void
+ALF_Application_Run(ALFApplication *app);
+
+BOOL
+ALF_Application_EnumToplevels(ALFApplication *app, WNDENUMPROC proc, LPARAM param);
+
+HWND
+ALF_Application_ActiveToplevel(ALFApplication *app);
+
+void
+ALF_Application_SetPreTranslateMessageHandler(ALFApplication *app, BOOL(*handler)(void *,MSG *), void *closure);
+
+BOOL
+ALF_Application_PreTranslateMessage(ALFApplication *app, MSG *msg, HWND modalToplevel);
+
+// TODO: implement modal stuff
+/*void
+ALF_Application_DisableWindowsForModal(ALFApplication *app, HWND skip);
+
+void
+ALF_Application_ReenableWindowsForModal(ALFApplication *app, HWND skip);*/
+
+// also destroys all toplevels associated with the application
+void
+ALF_DestroyApplication(ALFApplication *app);
+
+
 // toplevel window
 
 HWND
-ALF_CreateToplevelWindow(DWORD exstyle, DWORD style, HWND hwndOwner, ALFToplevelVTable *vtbl, void *closure);
+ALF_CreateToplevelWindow(DWORD exstyle, DWORD style, HWND hwndOwner, ALFApplication *app, ALFToplevelVTable *vtbl, void *closure);
+
+ALFApplication *
+ALF_Toplevel_Application(HWND toplevel);
 
 void
 ALF_Toplevel_Resize(HWND win, int cptWidth, int cptHeight);
-- 
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