From 73fe9713c20096054d1c20a6b01157dae6a3fdc9 Mon Sep 17 00:00:00 2001
From: Tobias Doerffel <tobias.doerffel@gmail.com>
Date: Tue, 15 Aug 2006 16:28:25 +0000
Subject: [PATCH] added knob linking-support

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@331 0778d3d1-df1d-0410-868b-ea421aaaa00d
---
 ChangeLog            |  6 ++++++
 src/widgets/knob.cpp | 29 ++++++++++++++++++++++++-----
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 05147b3f9..862457100 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2006-08-15	Tobias Doerffel	<tobydox/at/users/dot/sourceforge/dot/net>
+
+	* src/widgets/knob.cpp:
+	support for linking knobs using <Shift> + drag'n'drop (note that
+	connetions are not saved!)
+
 2006-08-15	Danny McRae <khjklujn/at/users/dot/sourceforge/dot/net>
 	* src/widgets/rack_plugin.cpp:
 	added deletion of the control view to the dtor to make it clean
diff --git a/src/widgets/knob.cpp b/src/widgets/knob.cpp
index e29e720a8..4fb7b4732 100644
--- a/src/widgets/knob.cpp
+++ b/src/widgets/knob.cpp
@@ -396,7 +396,8 @@ void knob::contextMenuEvent( QContextMenuEvent * )
 
 void knob::dragEnterEvent( QDragEnterEvent * _dee )
 {
-	stringPairDrag::processDragEnterEvent( _dee, "float_value" );
+	stringPairDrag::processDragEnterEvent( _dee, "float_value,"
+								"link_object" );
 }
 
 
@@ -405,12 +406,20 @@ void knob::dragEnterEvent( QDragEnterEvent * _dee )
 void knob::dropEvent( QDropEvent * _de )
 {
 	QString type = stringPairDrag::decodeKey( _de );
-	QString value = stringPairDrag::decodeValue( _de );
+	QString val = stringPairDrag::decodeValue( _de );
 	if( type == "float_value" )
 	{
-		setValue( value.toFloat() );
+		printf("set val\n");
+		setValue( val.toFloat() );
 		_de->accept();
 	}
+	else if( type == "link_object" )
+	{
+		printf("link!\n");
+		knob * obj = (knob *)( val.toULong() );
+		linkObjects( this, obj );
+		obj->setValue( value() );
+	}
 }
 
 
@@ -420,7 +429,8 @@ void knob::dropEvent( QDropEvent * _de )
 void knob::mousePressEvent( QMouseEvent * _me )
 {
 	if( _me->button() == Qt::LeftButton &&
-			eng()->getMainWindow()->isCtrlPressed() == FALSE )
+			eng()->getMainWindow()->isCtrlPressed() == FALSE &&
+			eng()->getMainWindow()->isShiftPressed() == FALSE )
 	{
 		setJournalling( FALSE );
 		m_oldValue = value();
@@ -450,11 +460,20 @@ void knob::mousePressEvent( QMouseEvent * _me )
 		m_buttonPressed = TRUE;
 	}
 	else if( _me->button() == Qt::LeftButton &&
-			eng()->getMainWindow()->isCtrlPressed() == TRUE )
+			eng()->getMainWindow()->isCtrlPressed() == TRUE/* &&
+			eng()->getMainWindow()->isShiftPressed() == FALSE*/ )
 	{
 		new stringPairDrag( "float_value", QString::number( value() ),
 						QPixmap(), this, eng() );
 	}
+	else if( _me->button() == Qt::LeftButton &&
+/*			eng()->getMainWindow()->isCtrlPressed() == TRUE &&*/
+			eng()->getMainWindow()->isShiftPressed() == TRUE )
+	{
+		new stringPairDrag( "link_object",
+						QString::number( (uint) this ),
+						QPixmap(), this, eng() );
+	}
 	else if( _me->button() == Qt::MidButton )
 	{
 		reset();