Changes in src/UIElements/Views/Qt4/QtToolBar.cpp [8859b5:c01fec]

File:

• src/UIElements/Views/Qt4/QtToolBar.cpp (modified) (5 diffs)

src/UIElements/Views/Qt4/QtToolBar.cpp

@@ -28 +28 @@
  */
 
-
-
-
 // include config.h
 #ifdef HAVE_CONFIG_H
@@ -36 +33 @@
 #endif
 
-
 #include "QtToolBar.hpp"
 
 #include "CodePatterns/MemDebug.hpp"
 
+#include "CodePatterns/Observer/Notification.hpp"
+
+#include "Actions/ActionQueue.hpp"
+
 QtToolBar::QtToolBar(QWidget * _parent) :
-  QToolBar(_parent)
+  QToolBar(_parent),
+  Observer("QToolBar"),
+  ActionQueue_observing(false),
+  undoaction(addActionItem("undo", "undo the last Action", "edit-undo")),
+  redoaction(addActionItem("redo", "redo the last Action", "edit-redo"))
 {
-  addActionItem("undo", "undo the last Action", "edit-undo");
-  addActionItem("redo", "redo the last Action", "edit-redo");
+  // gray out undo/redo buttons initially
+  undoaction->setEnabled(false);
+  redoaction->setEnabled(false);
+
+  // sign in
+  MoleCuilder::ActionQueue::getInstance().signOn(this, MoleCuilder::ActionQueue::ActionQueued);
+  ActionQueue_observing = true;
 }
 
@@ -51 +60 @@
 QtToolBar::~QtToolBar()
 {
+  // sign off
+  if (ActionQueue_observing)
+    MoleCuilder::ActionQueue::getInstance().signOff(this, MoleCuilder::ActionQueue::ActionQueued);
 }
 
 
-void QtToolBar::addActionItem(const std::string &token, const std::string &description, const std::string &icon_name)
+QAction * QtToolBar::addActionItem(
+    const std::string &token,
+    const std::string &description,
+    const std::string &icon_name)
 {
   QAction *action = addAction(QString(description.c_str()));
@@ -63 +78 @@
   plumbing.push_back(pipe);
   present_actions.insert( token );
+  return action;
 }
 
@@ -72 +88 @@
 }
 
+void QtToolBar::update(Observable *publisher)
+{
+  ASSERT(0, "QtToolBar::update() - this should never be called, we are only subscribed to channels.");
+}
+
+void QtToolBar::subjectKilled(Observable *publisher)
+{
+  ActionQueue_observing = false;
+}
+
+void QtToolBar::recieveNotification(Observable *publisher, Notification_ptr notification)
+{
+  if (dynamic_cast<MoleCuilder::ActionQueue *>(publisher) != NULL) {
+    switch(notification->getChannelNo()) {
+      case MoleCuilder::ActionQueue::ActionQueued:
+        undoaction->setEnabled(MoleCuilder::ActionQueue::getInstance().canUndo());
+        redoaction->setEnabled(MoleCuilder::ActionQueue::getInstance().canRedo());
+        break;
+      default:
+        ASSERT(0, "QtToolBar::recieveNotification() - cannot get here, not subscribed to channel "
+            +toString(notification->getChannelNo()));
+        break;
+    }
+  } else {
+    ASSERT(0, "QtToolBar::recieveNotification() - cannot get here, we are only subscribed to ActionQueue.");
+  }
+}