kconfig: qconf: fix support for the split view mode

At least on my tests (building against Qt5.13), it seems to
me that, since Kernel 3.14, the split view mode is broken.

Maybe it was not a top priority during the conversion time.

Anyway, this patch changes the logic in order to properly
support the split view mode and the single view mode.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/qconf.cc

@@ -742,7 +742,10 @@ void ConfigList::keyPressEvent(QKeyEvent* ev)
 		type = menu->prompt ? menu->prompt->type : P_UNKNOWN;
 		if (type == P_MENU && rootEntry != menu &&
 		    mode != fullMode && mode != menuMode) {
-			emit menuSelected(menu);
+			if (mode == menuMode)
+				emit menuSelected(menu);
+			else
+				emit itemSelected(menu);
 			break;
 		}
 	case Qt::Key_Space:
@@ -849,9 +852,12 @@ void ConfigList::mouseDoubleClickEvent(QMouseEvent* e)
 	if (!menu)
 		goto skip;
 	ptype = menu->prompt ? menu->prompt->type : P_UNKNOWN;
-	if (ptype == P_MENU && (mode == singleMode || mode == symbolMode))
-		emit menuSelected(menu);
-	else if (menu->sym)
+	if (ptype == P_MENU) {
+		if (mode == singleMode)
+			emit itemSelected(menu);
+		else if (mode == symbolMode)
+			emit menuSelected(menu);
+	} else if (menu->sym)
 		changeValue(item);
 
 skip:
@@ -1503,6 +1509,8 @@ ConfigMainWindow::ConfigMainWindow(void)
 		helpText, SLOT(setInfo(struct menu *)));
 	connect(configList, SIGNAL(menuSelected(struct menu *)),
 		SLOT(changeMenu(struct menu *)));
+	connect(configList, SIGNAL(itemSelected(struct menu *)),
+		SLOT(changeItens(struct menu *)));
 	connect(configList, SIGNAL(parentSelected()),
 		SLOT(goBack()));
 	connect(menuList, SIGNAL(menuChanged(struct menu *)),
@@ -1599,15 +1607,26 @@ void ConfigMainWindow::searchConfig(void)
 	searchWindow->show();
 }
 
-void ConfigMainWindow::changeMenu(struct menu *menu)
+void ConfigMainWindow::changeItens(struct menu *menu)
 {
 	configList->setRootMenu(menu);
+
 	if (configList->rootEntry->parent == &rootmenu)
 		backAction->setEnabled(false);
 	else
 		backAction->setEnabled(true);
 }
 
+void ConfigMainWindow::changeMenu(struct menu *menu)
+{
+	menuList->setRootMenu(menu);
+
+	if (menuList->rootEntry->parent == &rootmenu)
+		backAction->setEnabled(false);
+	else
+		backAction->setEnabled(true);
+}
+
 void ConfigMainWindow::setMenuLink(struct menu *menu)
 {
 	struct menu *parent;
@@ -1717,14 +1736,14 @@ void ConfigMainWindow::showSplitView(void)
 	fullViewAction->setEnabled(true);
 	fullViewAction->setChecked(false);
 
-	configList->mode = symbolMode;
+	configList->mode = menuMode;
 	if (configList->rootEntry == &rootmenu)
 		configList->updateListAll();
 	else
 		configList->setRootMenu(&rootmenu);
 	configList->setAllOpen(true);
 	configApp->processEvents();
-	menuList->mode = menuMode;
+	menuList->mode = symbolMode;
 	menuList->setRootMenu(&rootmenu);
 	menuList->setAllOpen(true);
 	menuView->show();

scripts/kconfig/qconf.h

@@ -71,6 +71,7 @@ public slots:
 signals:
 	void menuChanged(struct menu *menu);
 	void menuSelected(struct menu *menu);
+	void itemSelected(struct menu *menu);
 	void parentSelected(void);
 	void gotFocus(struct menu *);
 
@@ -298,6 +299,7 @@ class ConfigMainWindow : public QMainWindow {
 	ConfigMainWindow(void);
 public slots:
 	void changeMenu(struct menu *);
+	void changeItens(struct menu *);
 	void setMenuLink(struct menu *);
 	void listFocusChanged(void);
 	void goBack(void);