Immediate rendering of buffer change for one or multiple LyXView.

* Buffer: new changed() boost::signal.

* LyXView:
  - redrawWorkArea(): deleted
  - bufferChangedConnection_: new signal connection

* LyXFunc: replace LyXView::redrawWorkArea() direct call with Buffer::changed() signal emission.

* WorkArea.C: deleted some comments about redrawWorkArea.



git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15464 a592a061-630c-0410-9148-cb99ea01b6c8

src/buffer.h

@@ -118,6 +118,8 @@ public:
 	/// do we have a paragraph with this id?
 	bool hasParWithID(int id) const;
 
+	/// This signal is emitted when the buffer is changed.
+	boost::signal<void()> changed;
 	/// This signal is emitted when some parsing error shows up.
 	boost::signal<void(std::string)> errors;
 	/// This signal is emitted when some message shows up.

src/frontends/LyXView.C

@@ -94,14 +94,6 @@ void LyXView::setWorkArea(WorkArea * work_area)
 }
 
 
-void LyXView::redrawWorkArea()
-{
-	lyxerr[Debug::WORKAREA] << "LyXView::redrawWorkArea" << std::endl;
-	work_area_->redraw();
-	updateStatusBar();
-}
-
-
 WorkArea * LyXView::workArea()
 {
 	return work_area_;
@@ -136,7 +128,8 @@ void LyXView::setBuffer(Buffer * b)
 	updateToolbars();
 	updateLayoutChoice();
 	updateWindowTitle();
-	redrawWorkArea();
+	updateStatusBar();
+	work_area_->redraw();
 }
 
 
@@ -155,7 +148,8 @@ bool LyXView::loadLyXFile(string const & filename, bool tolastfiles)
 		connectBuffer(*work_area_->bufferView().buffer());
 		showErrorList("Parse");
 	}
-	redrawWorkArea();
+	updateStatusBar();
+	work_area_->redraw();
 	return loaded;
 }
 
@@ -165,6 +159,10 @@ void LyXView::connectBuffer(Buffer & buf)
 	if (errorsConnection_.connected())
 		disconnectBuffer();
 
+	bufferChangedConnection_ =
+		buf.changed.connect(
+			boost::bind(&WorkArea::redraw, work_area_));
+
 	errorsConnection_ =
 		buf.errors.connect(
 			boost::bind(&LyXView::showErrorList, this, _1));
@@ -197,6 +195,8 @@ void LyXView::connectBuffer(Buffer & buf)
 
 void LyXView::disconnectBuffer()
 {
+	errorsConnection_.disconnect();
+	bufferChangedConnection_.disconnect();
 	messageConnection_.disconnect();
 	busyConnection_.disconnect();
 	titleConnection_.disconnect();

src/frontends/LyXView.h

@@ -152,9 +152,6 @@ public:
 	/// returns true if this view has the focus.
 	virtual bool hasFocus() const = 0;
 
-	/// Temporary method used by the kernel to redraw the work area.
-	virtual void redrawWorkArea();
-
 	/// Temporary method to access the current workArea.
 	/// This is needed for the gtk frontend.
 	frontend::WorkArea * workArea();
@@ -197,6 +194,8 @@ private:
 	/// dialogs for this view
 	boost::scoped_ptr<Dialogs> dialogs_;
 
+	/// buffer changed signal connection
+	boost::signals::connection bufferChangedConnection_;
 	/// buffer errors signal connection
 	boost::signals::connection errorsConnection_;
 	/// buffer messages signal connection

src/frontends/WorkArea.C

@@ -250,11 +250,6 @@ void WorkArea::processKeySym(LyXKeySymPtr key,
 	 */
 //	if (buffer_view_->buffer())
 	toggleCursor();
-	
-	// uneeded "redraw()" call commented out for now.
-	// When/if the call to LyXView::redrawWorkArea() in "lyxfunc.C:1610"
-	// is not needed anymore, this line should be uncommented out
-	//redraw();
 }
 
 

src/lyxfunc.C

@@ -1606,7 +1606,8 @@ void LyXFunc::dispatch(FuncRequest const & cmd)
 			else if (update)
 				view()->update(Update::FitCursor);
 
-			lyx_view_->redrawWorkArea();
+			view()->buffer()->changed();
+			lyx_view_->updateStatusBar();
 
 			// if we executed a mutating lfun, mark the buffer as dirty
 			if (flag.enabled()