implement triple click

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5148 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/qt2/ChangeLog

@@ -1,3 +1,8 @@
+2002-08-29  John Levon  <levon@movementarian.org>
+
+	* QContentPane.C:
+	* QContentPane.h: implement triple click
+ 
 2002-08-29  John Levon  <levon@movementarian.org>
 
 	* QInclude.C: remove some wrong code removed from xforms

src/frontends/qt2/QContentPane.C

@@ -20,6 +20,8 @@
 
 #include <qevent.h>
 #include <qpainter.h>
+#include <qtimer.h>
+#include <qapplication.h>
  
 using std::endl;
 
@@ -97,6 +99,15 @@ void QContentPane::scrollBarChanged(int val)
  
 void QContentPane::mousePressEvent(QMouseEvent * e)
 {
+	if (dc_event_.active && dc_event_ == *e) {
+		dc_event_.active = false;
+		FuncRequest cmd(LFUN_MOUSE_TRIPLE,
+			dc_event_.x, dc_event_.y,
+			q_button_state(dc_event_.state));
+		wa_->dispatch(cmd);
+		return;
+	}
+ 
 	FuncRequest cmd
 		(LFUN_MOUSE_PRESS, e->x(), e->y(), q_button_state(e->button()));
 	wa_->dispatch(cmd);
@@ -130,12 +141,27 @@ void QContentPane::keyPressEvent(QKeyEvent * e)
 }
 
  
+void QContentPane::doubleClickTimeout()
+{
+	if (!dc_event_.active)
+		return;
+
+	dc_event_.active = false;
+ 
+	FuncRequest cmd(LFUN_MOUSE_DOUBLE,
+		dc_event_.x, dc_event_.y,
+		q_button_state(dc_event_.state));
+	wa_->dispatch(cmd);
+}
+
+
 void QContentPane::mouseDoubleClickEvent(QMouseEvent * e)
 {
-	FuncRequest cmd
-		(LFUN_MOUSE_DOUBLE, e->x(), e->y(), q_button_state(e->button()));
-	wa_->dispatch(cmd);
-	// FIXME: triple click 
+	dc_event_ = double_click(e);
+
+	// doubleClickInterval() is just too long.
+	QTimer::singleShot(QApplication::doubleClickInterval() / 1.5,
+		this, SLOT(doubleClickTimeout()));
 }
  
  

src/frontends/qt2/QContentPane.h

@@ -25,6 +25,26 @@
 
 class QWorkArea; 
  
+/// for emulating triple click
+struct double_click {
+	int x;
+	int y;
+	Qt::ButtonState state;
+	bool active;
+
+	bool operator==(QMouseEvent const & e) {
+		return x == e.x() && y == e.y()
+			&& state == e.button();
+	}
+
+	double_click()
+		: x(0), y(0), state(Qt::NoButton), active(false) {}
+ 
+	double_click(QMouseEvent * e)
+		: x(e->x()), y(e->y()),
+		state(e->button()), active(true) {}
+};
+
 /**
  * Widget for actually drawing the document on
  */
@@ -56,6 +76,8 @@ protected:
 	void keyPressEvent(QKeyEvent * e);
  
 public slots:
+	void doubleClickTimeout();
+ 
 	void scrollBarChanged(int);
  
 private:
@@ -64,6 +86,8 @@ private:
  
 	/// the double buffered pixmap
 	boost::scoped_ptr<QPixmap> pixmap_;
+
+	double_click dc_event_;
 };
 
 #endif // QCONTENTPANE_H

src/frontends/qt2/TODO

@@ -23,7 +23,6 @@ QCommandBuffer
  
 QContentPane 
 
-	- triple click
 	- figure out why a scroll doesn't update quickly, which leaves cursor artifacts
 	  whilst holding down page down etc. 
  
@@ -35,10 +34,6 @@ qfont_loader
 
 	- use lyxrc, check for failure, implement available()
  
-qfont_metrics
-
-	- per char ascent/descent
- 
 QForks
 
 	- don't implement me
@@ -47,10 +42,6 @@ QGraphics
 	
 	- remaining UI cleanups and fixes
  
-QInclude
-
-	- check no load stuff works ?
-
 QLImage
 
 	- get jpeg etc. to work