Fix [#26981] Command window is not opening in 2.57.0

Reported by Thomas Engel
Fix [#26938] Blender Zoom not working after startup (Windows)
  Reported by Ilija Boshkov

by applying patch [#26881] Fix for console disappearing in debug mode [Windows]
  Submitted by Alexander Kuznetsov (AlexK)

The patch moves console toggling code into GHOST and improves on the toggling behaviour.

The patch changes handling of WM_SYSCOMMAND so that alt-key toggling isn't a problem anymore.

intern/ghost/GHOST_C-api.h

@@ -845,6 +845,18 @@ extern GHOST_TUns8* GHOST_getClipboard(int selection);
 extern void GHOST_putClipboard(GHOST_TInt8 *buffer, int selection);
 
 
+
+/**
+ * Toggles console
+ * @action	0 - Hides
+ *			1 - Shows
+ *			2 - Toggles
+ *			3 - Hides if it runs not from  command line
+ *			* - Does nothing
+ * @return current status (1 -visible, 0 - hidden)
+ */
+extern int GHOST_toggleConsole(int action);
+
 #ifdef __cplusplus
 }
 #endif

intern/ghost/GHOST_ISystem.h

@@ -355,6 +355,16 @@ public:
 	 */
 	virtual GHOST_TSuccess getButtonState(GHOST_TButtonMask mask, bool& isDown) const = 0;
 
+	/**
+	 * Toggles console
+	 * @action	0 - Hides
+	 *			1 - Shows
+	 *			2 - Toggles
+	 *			3 - Hides if it runs not from  command line
+	 *			* - Does nothing
+	 * @return current status (1 -visible, 0 - hidden)
+	 */
+	virtual int toggleConsole(int action) = 0;
 	
 	/***************************************************************************************
 	 ** Access to clipboard.

intern/ghost/intern/GHOST_C-api.cpp

@@ -877,3 +877,9 @@ void GHOST_putClipboard(GHOST_TInt8 *buffer, int selection)
 	GHOST_ISystem* system = GHOST_ISystem::getSystem();
 	system->putClipboard(buffer, selection);
 }
+
+int GHOST_toggleConsole(int action)
+{
+	GHOST_ISystem* system = GHOST_ISystem::getSystem();
+	return system->toggleConsole(action);
+}

intern/ghost/intern/GHOST_SystemWin32.cpp

@@ -174,6 +174,8 @@ GHOST_SystemWin32::GHOST_SystemWin32()
 	GHOST_ASSERT(m_displayManager, "GHOST_SystemWin32::GHOST_SystemWin32(): m_displayManager==0\n");
 	m_displayManager->initialize();
 
+	m_consoleStatus = 1;
+
 	// Check if current keyboard layout uses AltGr and save keylayout ID for
 	// specialized handling if keys like VK_OEM_*. I.e. french keylayout
 	// generates VK_OEM_8 for their exclamation key (key left of right shift)
@@ -186,6 +188,7 @@ GHOST_SystemWin32::~GHOST_SystemWin32()
 {
 	// Shutdown COM
 	OleUninitialize();
+	toggleConsole(1);
 }
 
 
@@ -847,7 +850,14 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
 					 * a dead key that is pressed while holding down the alt key.
 					 * To prevent the sound, DefWindowProc must be avoided by return
 					 */
-					return 0;
+					break;
+				case WM_SYSCOMMAND:
+					/* The WM_SYSCHAR message is sent to the window when system commands such as 
+					 * maximize, minimize  or close the window are triggered. Also it is sent when ALT 
+					 * button is press for menu. To prevent this we must return preventing DefWindowProc.
+					 */
+					if(wParam==SC_KEYMENU) return 0;
+					break;
 				////////////////////////////////////////////////////////////////////////
 				// Tablet events, processed
 				////////////////////////////////////////////////////////////////////////
@@ -1047,8 +1057,12 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
 					 * DestroyWindow function sends the WM_NCDESTROY message to the window following the WM_DESTROY
 					 * message. WM_DESTROY is used to free the allocated memory object associated with the window. 
 					 */
+					break;
 				case WM_KILLFOCUS:
-					/* The WM_KILLFOCUS message is sent to a window immediately before it loses the keyboard focus. */
+					/* The WM_KILLFOCUS message is sent to a window immediately before it loses the keyboard focus. 
+					 * We want to prevent this if a window is still active and it loses focus to nowhere*/
+					if(!wParam && hwnd==GetActiveWindow())
+						SetFocus(hwnd);
 				case WM_SHOWWINDOW:
 					/* The WM_SHOWWINDOW message is sent to a window when the window is about to be hidden or shown. */
 				case WM_WINDOWPOSCHANGING:
@@ -1196,3 +1210,32 @@ void GHOST_SystemWin32::putClipboard(GHOST_TInt8 *buffer, bool selection) const
 		return;
 	}
 }
+
+int GHOST_SystemWin32::toggleConsole(int action)
+{
+	switch(action)
+	{
+		case 3: //hide if no console
+			{
+			CONSOLE_SCREEN_BUFFER_INFO csbi = {{0}};
+			if(!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi) || csbi.dwCursorPosition.X || csbi.dwCursorPosition.Y>1)
+				break;
+			}
+		case 0: //hide
+			ShowWindow(GetConsoleWindow(),SW_HIDE);
+			m_consoleStatus = 0;
+			break;
+		case 1: //show
+			ShowWindow(GetConsoleWindow(),SW_SHOW);
+			m_consoleStatus = 1;
+			break;
+		case 2: //toggle
+			ShowWindow(GetConsoleWindow(),m_consoleStatus?SW_HIDE:SW_SHOW);
+			m_consoleStatus=!m_consoleStatus;
+			break;
+
+	};
+
+
+	return m_consoleStatus;
+}

intern/ghost/intern/GHOST_SystemWin32.h

@@ -415,6 +415,17 @@ protected:
 	 * Initiates WM_INPUT messages from keyboard 
 	 */
 	GHOST_TInt32 initKeyboardRawInput(void);
+
+	/**
+ * Toggles console
+ * @action	0 - Hides
+ *			1 - Shows
+ *			2 - Toggles
+ *			3 - Hides if it runs not from  command line
+ *			* - Does nothing
+ * @return current status (1 -visible, 0 - hidden)
+ */
+	int toggleConsole(int action);
 	
 	/** The current state of the modifier keys. */
 	GHOST_ModifierKeys m_modifierKeys;
@@ -431,6 +442,9 @@ protected:
 	/** stores keyboard layout. */
 	HKL m_keylayout;
 
+	/** Console status */
+	int m_consoleStatus;
+
 	/** handle for user32.dll*/
 	HMODULE user32;
 	#ifdef NEED_RAW_PROC
@@ -471,6 +485,5 @@ inline void GHOST_SystemWin32::handleKeyboardChange(void)
 		}
 	}
 }
-
 #endif // _GHOST_SYSTEM_WIN32_H_
 

source/blender/blenlib/BLI_winstuff.h

@@ -127,7 +127,6 @@ typedef struct _DIR {
 	struct dirent direntry;
 } DIR;
 
-int IsConsoleEmpty(void);
 void RegisterBlendExtension(void);
 DIR *opendir (const char *path);
 struct dirent *readdir(DIR *dp);

source/blender/blenlib/intern/winstuff.c

@@ -66,14 +66,6 @@ int BLI_getInstallationDir( char * str ) {
 	return 1;
 }
 
-int IsConsoleEmpty(void)
-{
-	CONSOLE_SCREEN_BUFFER_INFO csbi = {{0}};
-	HANDLE hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
-
-	return GetConsoleScreenBufferInfo(hStdOutput, &csbi) && csbi.dwCursorPosition.X == 0 && csbi.dwCursorPosition.Y == 0;
-}
-
 void RegisterBlendExtension_Fail(HKEY root)
 {
 	printf("failed\n");

source/blender/windowmanager/intern/wm_init_exit.c

@@ -75,6 +75,7 @@
 #include "SYS_System.h"
 #endif
 #include "GHOST_Path-api.h"
+#include "GHOST_C-api.h"
 
 #include "RNA_define.h"
 
@@ -104,7 +105,6 @@
 
 #include "BKE_depsgraph.h"
 #include "BKE_sound.h"
-#include "GHOST_C-api.h"
 
 static void wm_init_reports(bContext *C)
 {
@@ -120,17 +120,11 @@ int wm_start_with_console = 0;
 /* only called once, for startup */
 void WM_init(bContext *C, int argc, const char **argv)
 {
-
 	if (!G.background) {
 		wm_ghost_init(C);	/* note: it assigns C to ghost! */
 		wm_init_cursor_data();
-#ifdef WIN32
-		if (IsConsoleEmpty()) /* never hide if the console window pre-existed */
-			WM_console_toggle(C, wm_start_with_console);
-#endif
 	}
 	GHOST_CreateSystemPaths();
-
 	wm_operatortype_init();
 	
 	set_free_windowmanager_cb(wm_close_and_free);	/* library.c */
@@ -144,7 +138,6 @@ void WM_init(bContext *C, int argc, const char **argv)
 	
 	BLF_init(11, U.dpi); /* Please update source/gamengine/GamePlayer/GPG_ghost.cpp if you change this */
 	BLF_lang_init();
-	
 	/* get the default database, plus a wm */
 	WM_read_homefile(C, NULL, G.factory_startup);
 
@@ -167,6 +160,9 @@ void WM_init(bContext *C, int argc, const char **argv)
 	(void)argv; /* unused */
 #endif
 
+	if (!G.background && !wm_start_with_console)
+		GHOST_toggleConsole(3);
+
 	wm_init_reports(C); /* reports cant be initialized before the wm */
 
 	if (!G.background) {
@@ -194,7 +190,6 @@ void WM_init(bContext *C, int argc, const char **argv)
 	*/
 
 	BLI_strncpy(G.lib, G.main->name, FILE_MAX);
-
 }
 
 void WM_init_splash(bContext *C)
@@ -357,9 +352,6 @@ void WM_exit(bContext *C)
 
 	sound_exit();
 
-#ifdef WIN32
-	WM_console_toggle(C, 1); /* never leave behind invisible consoles */
-#endif
 
 	/* first wrap up running stuff, we assume only the active WM is running */
 	/* modal handlers are on window level freed, others too? */
@@ -481,7 +473,6 @@ void WM_exit(bContext *C)
 		getchar();
 	}
 #endif 
-	
 	exit(G.afbreek==1);
 }
 

source/blender/windowmanager/intern/wm_operators.c

@@ -38,12 +38,7 @@
 #include <stddef.h>
 #include <assert.h>
 
-#ifdef WIN32
-#include "BLI_winstuff.h"
-#include <windows.h>  
-
-#include <io.h>
-#endif
+#include "GHOST_C-api.h"
 
 #include "MEM_guardedalloc.h"
 
@@ -2001,7 +1996,6 @@ static void WM_OT_collada_import(wmOperatorType *ot)
 #endif
 
 
-
 /* *********************** */
 
 static void WM_OT_window_fullscreen_toggle(wmOperatorType *ot)
@@ -2035,28 +2029,10 @@ static void WM_OT_quit_blender(wmOperatorType *ot)
 }
 
 /* *********************** */
-#if defined(WIN32)
-static int console= 1;
-void WM_console_toggle(bContext *UNUSED(C), short show)
-{
-	if(show) {
-		ShowWindow(GetConsoleWindow(),SW_SHOW);
-		console= 1;
-	}
-	else {
-		ShowWindow(GetConsoleWindow(),SW_HIDE);
-		console= 0;
-	}
-}
 
 static int wm_console_toggle_op(bContext *C, wmOperator *UNUSED(op))
 {
-	if(console) {
-		WM_console_toggle(C, 0);
-	}
-	else {
-		WM_console_toggle(C, 1);
-	}
+	GHOST_toggleConsole(2);
 	return OPERATOR_FINISHED;
 }
 
@@ -2069,7 +2045,6 @@ static void WM_OT_console_toggle(wmOperatorType *ot)
 	ot->exec= wm_console_toggle_op;
 	ot->poll= WM_operator_winactive;
 }
-#endif
 
 /* ************ default paint cursors, draw always around cursor *********** */
 /*