From 0a3313d317a7f2f1c48cf4ed2dc6faa26e23d9b7 Mon Sep 17 00:00:00 2001
From: Radim Blazek <radim.blazek@gmail.com>
Date: Thu, 4 Jul 2013 13:25:18 +0200
Subject: [PATCH] added change signal to clipboard

---
 src/app/CMakeLists.txt   | 1 +
 src/app/qgisapp.cpp      | 7 +++++--
 src/app/qgisapp.h        | 2 ++
 src/app/qgsclipboard.cpp | 8 +++++++-
 src/app/qgsclipboard.h   | 8 +++++++-
 5 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index cf7920e09f7..683d1017cde 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -171,6 +171,7 @@ SET (QGIS_APP_MOC_HDRS
   qgsattributetabledialog.h
   qgsbookmarks.h
   qgsbrowserdockwidget.h
+  qgsclipboard.h
   qgsconfigureshortcutsdialog.h
   qgscustomization.h
   qgscustomprojectiondialog.h
diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index 6ffd0b51fe2..e7ffd0e9b47 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -573,6 +573,7 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, QWidget * parent,
   mLogDock->hide();
 
   mInternalClipboard = new QgsClipboard; // create clipboard
+  connect( mInternalClipboard, SIGNAL( changed() ), this, SLOT( clipboardChanged() ) );
   mQgisInterface = new QgisAppInterface( this ); // create the interfce
 
 #ifdef Q_WS_MAC
@@ -5483,7 +5484,6 @@ void QgisApp::editCut( QgsMapLayer * layerContainingSelection )
   selectionVectorLayer->beginEditCommand( tr( "Features cut" ) );
   selectionVectorLayer->deleteSelectedFeatures();
   selectionVectorLayer->endEditCommand();
-  activateDeactivateLayerRelatedActions( activeLayer() );
 }
 
 void QgisApp::editCopy( QgsMapLayer * layerContainingSelection )
@@ -5499,9 +5499,12 @@ void QgisApp::editCopy( QgsMapLayer * layerContainingSelection )
 
   // Test for feature support in this layer
   clipboard()->replaceWithCopyOf( selectionVectorLayer );
-  activateDeactivateLayerRelatedActions( activeLayer() );
 }
 
+void QgisApp::clipboardChanged()
+{
+  activateDeactivateLayerRelatedActions( activeLayer() );
+}
 
 void QgisApp::editPaste( QgsMapLayer *destinationLayer )
 {
diff --git a/src/app/qgisapp.h b/src/app/qgisapp.h
index dc6f23d789b..647fc859f84 100644
--- a/src/app/qgisapp.h
+++ b/src/app/qgisapp.h
@@ -1129,6 +1129,8 @@ class QgisApp : public QMainWindow, private Ui::MainWindow
     void osmImportDialog();
     void osmExportDialog();
 
+    void clipboardChanged();
+
   signals:
     /** emitted when a key is pressed and we want non widget sublasses to be able
       to pick up on this (e.g. maplayer) */
diff --git a/src/app/qgsclipboard.cpp b/src/app/qgsclipboard.cpp
index aae3f66f8b7..80cd6218e44 100644
--- a/src/app/qgsclipboard.cpp
+++ b/src/app/qgsclipboard.cpp
@@ -18,6 +18,7 @@
 #include <fstream>
 
 #include <QApplication>
+#include <QObject>
 #include <QString>
 #include <QStringList>
 #include <QClipboard>
@@ -33,7 +34,8 @@
 #include "qgsvectorlayer.h"
 
 QgsClipboard::QgsClipboard()
-    : mFeatureClipboard()
+    : QObject()
+    , mFeatureClipboard()
     , mFeatureFields()
 {
 }
@@ -55,6 +57,7 @@ void QgsClipboard::replaceWithCopyOf( QgsVectorLayer *src )
   QgsDebugMsg( "replaced QGis clipboard." );
 
   setSystemClipboard();
+  emit changed();
 }
 
 void QgsClipboard::replaceWithCopyOf( QgsFeatureStore & featureStore )
@@ -64,6 +67,7 @@ void QgsClipboard::replaceWithCopyOf( QgsFeatureStore & featureStore )
   mFeatureClipboard = featureStore.features();
   mCRS = featureStore.crs();
   setSystemClipboard();
+  emit changed();
 }
 
 void QgsClipboard::setSystemClipboard()
@@ -149,6 +153,7 @@ void QgsClipboard::clear()
   mFeatureClipboard.clear();
 
   QgsDebugMsg( "cleared clipboard." );
+  emit changed();
 }
 
 void QgsClipboard::insert( QgsFeature& feature )
@@ -156,6 +161,7 @@ void QgsClipboard::insert( QgsFeature& feature )
   mFeatureClipboard.push_back( feature );
 
   QgsDebugMsg( "inserted " + feature.geometry()->exportToWkt() );
+  emit changed();
 }
 
 bool QgsClipboard::empty()
diff --git a/src/app/qgsclipboard.h b/src/app/qgsclipboard.h
index 73fc6c43cdc..9c6a49eb379 100644
--- a/src/app/qgsclipboard.h
+++ b/src/app/qgsclipboard.h
@@ -20,6 +20,7 @@
 
 #include <QList>
 #include <QMap>
+#include <QObject>
 
 #include "qgsfield.h"
 #include "qgsfeature.h"
@@ -49,8 +50,9 @@ class QgsVectorLayer;
  */
 #define QGSCLIPBOARD_STYLE_MIME "application/qgis.style"
 
-class QgsClipboard
+class QgsClipboard : public QObject
 {
+    Q_OBJECT
   public:
     /**
     * Constructor for the clipboard.
@@ -139,6 +141,10 @@ class QgsClipboard
      */
     const QgsFields &fields() { return mFeatureFields; }
 
+  signals:
+    /** Emited when content changed */
+    void changed();
+
   private:
     /*
      * Set system clipboard from previously set features.