KDesktop: customizable icon spacing.

This commit introduces changes to KDesktop which allow for a custom
icon spacing option, some new controls into the Desktop Behaviour
module of KControl, as well as the KDesktop Ctrl+Mouse Scroll binding
to manipulate the icon spacing.

This commit depends on a previous (minor) change in LibKonq.

Signed-off-by: Mavridis Philippe <mavridisf@gmail.com>

4 files changed, 104 insertions, 30 deletions

diff --git a/kdesktop/kdesktop.kcfg b/kdesktop/kdesktop.kcfg
index 5df427c71..71e008562 100644
--- a/kdesktop/kdesktop.kcfg
+++ b/kdesktop/kdesktop.kcfg
@@ -155,6 +155,16 @@
       <label>Align direction</label>
       <whatsthis>If this is enabled, icons are aligned vertically, otherwise horizontally.</whatsthis>
     </entry>
+    <entry key="IconSpacing" type="Int">
+      <default>5</default>
+      <label>Icon spacing</label>
+      <whatsthis><p>This is the minimal distance (in pixels) between the icons on your desktop.</p></whatsthis>
+    </entry>
+    <entry key="SpacingCtrlScroll" type="Bool">
+      <default>false</default>
+      <label>Change spacing by Ctrl+Mouse Scroll</label>
+      <whatsthis><p>If this is enabled, you can change desktop icon spacing by pressing Ctrl and scrolling on the desktop background.</p></whatsthis>
+    </entry>
     <entry key="Preview" type="StringList">
       <default></default>
       <label>Show Icon Previews For</label>
diff --git a/kdesktop/kdiconview.cpp b/kdesktop/kdiconview.cpp
index c8c5a1fe6..409887784 100644
--- a/kdesktop/kdiconview.cpp
+++ b/kdesktop/kdiconview.cpp
@@ -191,15 +191,13 @@ KDIconView::KDIconView( TQWidget *parent, const char* name )
 
     if (!m_bEditableDesktopIcons)
     {
-       setItemsMovable(false);
-       setAcceptDrops(false);
-       viewport()->setAcceptDrops(false);
+      setIconsLocked(true);
     }
 }
 
 KDIconView::~KDIconView()
 {
-    if (m_dotDirectory && !m_bEditableDesktopIcons) {
+    if (m_dotDirectory && !m_bEditableDesktopIcons || m_iconsLocked) {
       m_dotDirectory->rollback(false); // Don't save positions
     }
 
@@ -296,6 +294,7 @@ void KDIconView::initConfig( bool init )
     m_bVertAlign = KDesktopSettings::vertAlign();
     TQStringList oldPreview = previewSettings();
     setPreviewSettings( KDesktopSettings::preview() );
+    setSpacing( KDesktopSettings::iconSpacing() );
 
     // read arrange configuration
     m_eSortCriterion  = (SortCriterion)KDesktopSettings::sortCriterion();
@@ -486,6 +485,30 @@ void KDIconView::lineupIcons()
     saveIconPositions();
 }
 
+void KDIconView::incIconSpacing()
+{
+    if ( m_autoAlign && !KDesktopSettings::lockIcons() && KDesktopSettings::spacingCtrlScroll() )
+    {
+        setSpacing( ( spacing() + 1 ) );
+        lineupIcons();
+
+        KDesktopSettings::setIconSpacing( spacing() );
+        KDesktopSettings::writeConfig();
+    }
+}
+
+void KDIconView::decIconSpacing()
+{
+    if ( m_autoAlign && !KDesktopSettings::lockIcons() && KDesktopSettings::spacingCtrlScroll() && spacing() > 5 )
+    {
+        setSpacing( ( spacing() - 1 ) );
+        lineupIcons();
+
+        KDesktopSettings::setIconSpacing( spacing() );
+        KDesktopSettings::writeConfig();
+    }
+}
+
 void KDIconView::setAutoAlign( bool b )
 {
     m_autoAlign = b;
@@ -517,6 +540,15 @@ void KDIconView::setAutoAlign( bool b )
     }
 }
 
+void KDIconView::setIconsLocked( bool lock )
+{
+  m_iconsLocked = lock;
+
+  setItemsMovable(!lock);
+  setAcceptDrops(!lock);
+  viewport()->setAcceptDrops(!lock);
+}
+
 void KDIconView::startDirLister()
 {
     // if desktop is resized before start() is called (XRandr)
@@ -644,7 +676,22 @@ void KDIconView::wheelEvent( TQWheelEvent* e )
     TQIconViewItem *item = findItem( e->pos() );
     if ( !item )
     {
-      emit wheelRolled( e->delta() );
+      TQWheelEvent *we = TQT_TQWHEELEVENT(e);
+
+      if ( we->state() == ControlButton )
+      {
+        if ( we->delta() >= 0 )
+          incIconSpacing();
+        else
+          decIconSpacing();
+
+        we->accept();
+      }
+      else
+      {
+        emit wheelRolled( e->delta() );
+      }
+
       return;
     }
 
@@ -1726,25 +1773,25 @@ void KDIconView::viewportWheelEvent( TQWheelEvent * e )
 void KDIconView::updateWorkArea( const TQRect &wr )
 {
 	m_gotIconsArea = true;  // now we have it!
-	
+
 	if (( iconArea() == wr ) && (m_needDesktopAlign == false)) {
 		// nothing changed; avoid repaint/saveIconPosition ...
 		return;
 	}
-	
+
 	TQRect oldArea = iconArea();
 	setIconArea( wr );
-	
+
 	kdDebug(1204) << "KDIconView::updateWorkArea wr: " << wr.x() << "," << wr.y() << " " << wr.width() << "x" << wr.height() << endl;
 	kdDebug(1204) << "  oldArea:                     " << oldArea.x() << "," << oldArea.y() << " " << oldArea.width() << "x" << oldArea.height() << endl;
-	
+
 	bool needRepaint = false;
 	TQIconViewItem* item;
 	int dx, dy;
-	
+
 	dx = wr.left() - oldArea.left();
 	dy = wr.top() - oldArea.top();
-	
+
 	if ( dx != 0 || dy != 0 ) {
 		if ( (dx > 0) || (dy > 0) ) {
 			// the iconArea was shifted right/down; less space now
@@ -1762,14 +1809,14 @@ void KDIconView::updateWorkArea( const TQRect &wr )
 			// the iconArea was shifted left/up; more space now - use it
 			needRepaint = true;
 		}
-	
+
 		if ( needRepaint ) {
 			for ( item = firstItem(); item; item = item->nextItem() ) {
 				item->moveBy( dx, dy );
 			}
 		}
 	}
-	
+
 	for ( item = firstItem(); item; item = item->nextItem() ) {
 		TQRect r( item->rect() );
 		int dx = 0, dy = 0;
@@ -1789,7 +1836,7 @@ void KDIconView::updateWorkArea( const TQRect &wr )
 		repaint( FALSE );
 		saveIconPositions();
 	}
-	
+
 	m_needDesktopAlign = false;
 	lineupIcons();
 }
@@ -1861,18 +1908,18 @@ bool KDIconView::isFreePosition( const TQIconViewItem *item, const TQRect &curre
 	if (!area.contains(r, FALSE)) {
 		return false;
 	}
-	
+
 	TQIconViewItem *it = firstItem();
 	for (; it; it = it->nextItem() ) {
 		if ( !it->rect().isValid() || it == item ) {
 			continue;
 		}
-		
+
 		if ( it->intersects( r ) ) {
 			return false;
 		}
 	}
-	
+
 	return true;
 }
 
@@ -1891,12 +1938,12 @@ bool KDIconView::isFreePosition( const TQIconViewItem *item, const TQRect& rect,
 		if ( !rect.isValid() || it == item ) {
 			continue;
 		}
-		
+
 		if ( it->intersects( rect ) ) {
 			return false;
 		}
 	}
-	
+
 	return true;
 }
 
@@ -1921,12 +1968,12 @@ void KDIconView::moveToFreePosition(TQIconViewItem *item, const TQRect &currentI
 		m_lastDeletedIconPos = TQPoint();
 		return;
 	}
-	
+
 	//try to find a free place to put the item, honouring the m_bVertAlign property
 	TQRect rect=item->rect();
 	if (m_bVertAlign) {
 		kdDebug(1214)<<"moveToFreePosition for vertical alignment"<<endl;
-	
+
 		rect.moveTopLeft(TQPoint(currentIconArea.x()+spacing(),currentIconArea.y()+spacing()));
 		do {
 			success=false;
@@ -1939,7 +1986,7 @@ void KDIconView::moveToFreePosition(TQIconViewItem *item, const TQRect &currentI
 					break;
 				}
 			}
-		
+
 			if (!success) {
 				rect.moveTopLeft(TQPoint(rect.right()+spacing(),spacing()));
 			}
diff --git a/kdesktop/kdiconview.h b/kdesktop/kdiconview.h
index 7b20e1817..f3ebe6718 100644
--- a/kdesktop/kdiconview.h
+++ b/kdesktop/kdiconview.h
@@ -75,6 +75,7 @@ public:
 
     void lineupIcons(TQIconView::Arrangement);
 
+    void setIconsLocked( bool b );
     void setAutoAlign( bool b );
 
     TQStringList selectedURLs();
@@ -165,6 +166,9 @@ public slots:
     void slotClear();
     void refreshIcons();
 
+    void incIconSpacing();
+    void decIconSpacing();
+
 protected slots:
     void slotFreeSpaceOverlayStart();
     void slotFreeSpaceOverlayFinished();
@@ -214,6 +218,7 @@ private:
 
     bool m_bNeedRepaint;
     bool m_bNeedSave;
+    bool m_iconsLocked;
     bool m_autoAlign;
 
     /** true if even one icon has an icon-position entry in the .directory */
diff --git a/kdesktop/krootwm.cpp b/kdesktop/krootwm.cpp
index e5b4b76e0..4010c1f22 100644
--- a/kdesktop/krootwm.cpp
+++ b/kdesktop/krootwm.cpp
@@ -109,7 +109,7 @@ KRootWm::KRootWm(SaverEngine* _saver, KDesktop* _desktop) : TQObject(_desktop),
      bookmarks = 0;
      bookmarkMenu = 0;
   }
-  
+
   // The windowList and desktop menus can be part of a menubar (Mac style)
   // so we create them here
   desktopMenu = new TQPopupMenu;
@@ -250,7 +250,7 @@ void KRootWm::initConfig()
   if ( m_bDesktopEnabled ) {
     m_pDesktop->iconView()->setAutoAlign( KDesktopSettings::autoLineUpIcons() );
     if ( kapp->authorize( "editable_desktop_icons" ) ) {
-        m_pDesktop->iconView()->setItemsMovable( !KDesktopSettings::lockIcons() );
+        m_pDesktop->iconView()->setIconsLocked( KDesktopSettings::lockIcons() );
         TDEToggleAction *aLockIcons = static_cast<TDEToggleAction*>(m_actionCollection->action("lock_icons"));
         if (aLockIcons)
             aLockIcons->setChecked( KDesktopSettings::lockIcons()  );
@@ -732,12 +732,24 @@ void KRootWm::slotLineupIcons() {
 
 void KRootWm::slotToggleLockIcons( bool lock )
 {
-    if (m_bDesktopEnabled)
-    {
-        m_pDesktop->iconView()->setItemsMovable( !lock );
-        KDesktopSettings::setLockIcons( lock );
-        KDesktopSettings::writeConfig();
-    }
+   KDesktopSettings::setLockIcons( lock );
+   KDesktopSettings::writeConfig();
+
+   // Also save it globally...
+   int desktop = TDEApplication::desktop()->primaryScreen();
+   TQCString cfilename;
+   if (desktop == 0)
+       cfilename = "kdesktoprc";
+   else
+       cfilename.sprintf("kdesktop-screen-%drc", desktop);
+
+   TDEConfig *kdg_config = new TDEConfig(cfilename, false, false);
+   kdg_config->setGroup( "General" );
+   kdg_config->writeEntry( "LockIcons", lock );
+   kdg_config->sync();
+   delete kdg_config;
+
+   m_pDesktop->iconView()->setIconsLocked( lock );
 }
 
 void KRootWm::slotRefreshDesktop() {