New Widget: MenuBar

SOURCECONF.cmake

@@ -15,6 +15,7 @@ SET( ${TARGETLIB}_SOURCES
   YItem.cc
   YIconLoader.cc
   YMacro.cc
+  YMenuItem.cc
   YProperty.cc
   YShortcut.cc
   YShortcutManager.cc
@@ -54,7 +55,9 @@ SET( ${TARGETLIB}_SOURCES
   YLabel.cc
   YLayoutBox.cc
   YLogView.cc
+  YMenuBar.cc
   YMenuButton.cc
+  YMenuWidget.cc
   YMultiLineEdit.cc
   YMultiProgressMeter.cc
   YMultiSelectionBox.cc
@@ -107,10 +110,10 @@ SET( ${TARGETLIB}_HEADERS
   YItem.h
   YItemCustomStatus.h
   YIconLoader.h
-  YMenuItem.h
   YMacro.h
   YMacroPlayer.h
   YMacroRecorder.h
+  YMenuItem.h
   YPackageSelectorPlugin.h
   YGraphPlugin.h
   YProperty.h
@@ -154,7 +157,9 @@ SET( ${TARGETLIB}_HEADERS
   YLabel.h
   YLayoutBox.h
   YLogView.h
+  YMenuBar.h
   YMenuButton.h
+  YMenuWidget.h
   YMultiLineEdit.h
   YMultiProgressMeter.h
   YMultiSelectionBox.h
@@ -198,7 +203,9 @@ SET( EXAMPLES_LIST
   ItemSelector1.cc
   ItemSelector2-minimalistic.cc
   ManyWidgets.cc
-  MenuButtons.cc
+  MenuBar1.cc
+  MenuBar2.cc
+  MenuButton1.cc
   PollEvent.cc
   SelectionBox1.cc
   SelectionBox2.cc

examples/MenuBar1.cc

@@ -0,0 +1,248 @@
+/*
+  Copyright (c) [2020] SUSE LLC
+  This library is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) version 3.0 of the License. This library
+  is distributed in the hope that it will be useful, but WITHOUT ANY
+  WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+  License for more details. You should have received a copy of the GNU
+  Lesser General Public License along with this library; if not, write
+  to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
+  Floor, Boston, MA 02110-1301 USA
+*/
+
+
+// MenuBar example.
+//
+// Compile with:
+//
+//     g++ -I/usr/include/yui -lyui MenuBar1.cc -o MenuBar1
+
+#define YUILogComponent "example"
+#include "YUILog.h"
+
+#include "YUI.h"
+#include "YAlignment.h"
+#include "YDialog.h"
+#include "YLabel.h"
+#include "YCheckBox.h"
+#include "YLayoutBox.h"
+#include "YMenuBar.h"
+#include "YSquash.h"
+#include "YWidgetFactory.h"
+#include "YShortcut.h"
+#include "YEvent.h"
+
+
+using std::string;
+
+
+// Widgets
+
+YDialog	  * dialog		= 0;
+YMenuBar  * menuBar		= 0;
+YLabel	  * lastEventLabel	= 0;
+YCheckBox * readOnlyCheckBox	= 0;
+
+
+// Menus and Menu Items
+
+YMenuItem * fileMenu		= 0;
+YMenuItem * editMenu		= 0;
+YMenuItem * viewMenu		= 0;
+YMenuItem * optionsMenu		= 0;
+
+
+// "File" menu
+
+YMenuItem * actionOpen		= 0;
+YMenuItem * actionSave		= 0;
+YMenuItem * actionSaveAs	= 0;
+YMenuItem * actionQuit		= 0;
+
+
+// "Edit" menu
+
+YMenuItem * actionCut		= 0;
+YMenuItem * actionCopy		= 0;
+YMenuItem * actionPaste		= 0;
+
+
+// "View" menu
+
+YMenuItem * actionViewNormal	= 0;
+YMenuItem * actionViewCompact	= 0;
+YMenuItem * actionViewDetailed	= 0;
+
+
+// "View" -> "Zoom" submenu
+
+YMenuItem * zoomMenu		= 0;
+YMenuItem * actionZoomIn	= 0;
+YMenuItem * actionZoomOut	= 0;
+YMenuItem * actionZoomDefault	= 0;
+
+// "Options" menu
+
+YMenuItem * actionSettings	= 0;
+
+
+// Function Prototypes
+
+void createWidgets();
+void addMenus( YMenuBar * menuBar );
+void handleEvents();
+void showEvent( YMenuEvent * event );
+void updateActions();
+
+
+
+
+int main( int argc, char **argv )
+{
+    YUILog::setLogFileName( "/tmp/libyui-examples.log" );
+    YUILog::enableDebugLogging();
+
+    createWidgets();
+    updateActions();
+    handleEvents();
+
+    dialog->destroy();
+}
+
+
+/**
+ * Create the widget tree for the main dialog
+ **/
+void createWidgets()
+{
+    yuiMilestone() << endl;
+
+    YWidgetFactory * fac = YUI::widgetFactory();
+
+    dialog		 = fac->createPopupDialog();
+    YAlignment * minSize = fac->createMinSize( dialog, 50, 20 );
+    YLayoutBox * vbox1	 = fac->createVBox( minSize );
+    menuBar		 = fac->createMenuBar( vbox1 );
+
+    addMenus( menuBar );
+
+    YAlignment * center	 = fac->createHVCenter( vbox1 );
+    YSquash    * squash	 = fac->createHVSquash( center );
+    YLayoutBox * vbox2	 = fac->createVBox( squash );
+
+    YAlignment * left = fac->createLeft( vbox2 );
+    fac->createLabel   ( left, "Last Event:" );
+    fac->createVSpacing( vbox2, 0.2 );
+    YAlignment * minWidth = fac->createMinWidth( vbox2, 15 );
+    lastEventLabel = fac->createOutputField( minWidth, "<none>" );
+
+    fac->createVSpacing( vbox2, 2 );
+    readOnlyCheckBox = fac->createCheckBox( vbox2, "Read &Only", true );
+    readOnlyCheckBox->setNotify( true );
+}
+
+
+void addMenus( YMenuBar * menuBar )
+{
+    // The difference between a menu and a plain menu item is just that the
+    // menu has child items whild the plain item does not.
+
+    fileMenu	= menuBar->addMenu( "&File" );
+    editMenu	= menuBar->addMenu( "&Edit" );
+    viewMenu	= menuBar->addMenu( "&View" );
+    optionsMenu = menuBar->addMenu( "&Options" );
+
+    actionOpen		= fileMenu->addItem( "&Open..."	   );
+    actionSave		= fileMenu->addItem( "&Save"	   );
+    actionSaveAs	= fileMenu->addItem( "Save &As..." );
+    fileMenu->addSeparator();
+    actionQuit		= fileMenu->addItem( "&Quit" );
+
+    actionCut		= editMenu->addItem( "C&ut"   );
+    actionCopy		= editMenu->addItem( "&Copy"  );
+    actionPaste		= editMenu->addItem( "&Paste" );
+
+    actionViewNormal	= viewMenu->addItem( "&Normal"	 );
+    actionViewCompact	= viewMenu->addItem( "&Compact"	 );
+    actionViewDetailed	= viewMenu->addItem( "&Detailed" );
+    viewMenu->addSeparator();
+    zoomMenu		= viewMenu->addMenu( "&Zoom" );
+
+    actionZoomIn	= zoomMenu->addItem( "Zoom &In"	     );
+    actionZoomOut	= zoomMenu->addItem( "Zoom &Out"     );
+    actionZoomDefault	= zoomMenu->addItem( "Zoom &Default" );
+
+    actionSettings	= optionsMenu->addItem( "&Settings..." );
+
+    menuBar->resolveShortcutConflicts();
+    menuBar->rebuildMenuTree();
+}
+
+
+/**
+ * Event loop and event handling for the main dialog
+ **/
+void handleEvents()
+{
+    yuiMilestone() << endl;
+
+    while ( true )
+    {
+	YEvent * event = dialog->waitForEvent();
+
+	if ( event )
+	{
+	    if ( event->eventType() == YEvent::CancelEvent ) // window manager "close window" button
+	    {
+		break; // leave event loop
+	    }
+
+	    if ( event->eventType() == YEvent::MenuEvent )
+	    {
+		YMenuEvent * menuEvent = dynamic_cast<YMenuEvent *>( event );
+
+		if ( menuEvent )
+		{
+		    showEvent( menuEvent );
+
+		    if ( menuEvent->item() == actionQuit )
+			break; // leave event loop
+		}
+	    }
+
+	    if ( event->widget() == readOnlyCheckBox )
+		updateActions();
+	}
+    }
+}
+
+
+/**
+ * Show the (label of) the item causing a menu event in the 'lastEventLabel'
+ * widget.
+ **/
+void showEvent( YMenuEvent * event )
+{
+    if ( event && event->item() )
+    {
+	string text = YShortcut::cleanShortcutString( event->item()->label() );
+	lastEventLabel->setLabel( text );
+    }
+}
+
+
+/**
+ * Update the available menu actions: Enable or disable some of them according
+ * to the current status of the "Read Only" check box.
+ **/
+void updateActions()
+{
+    bool readOnly = readOnlyCheckBox->isChecked();
+
+    menuBar->setItemEnabled( actionSave,  ! readOnly );
+    menuBar->setItemEnabled( actionCut,	  ! readOnly );
+    menuBar->setItemEnabled( actionPaste, ! readOnly );
+}