Added tracking button and logic for live mouse tracking.

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@9010 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/plugins/coordinate_capture/coordinatecapture.cpp

@@ -43,6 +43,7 @@
 #include <QLineEdit>
 #include <QClipboard>
 #include <QPushButton>
+#include <QToolButton>
 
 static const char * const sIdent = "$Id: plugin.cpp 8053 2008-01-26 13:59:53Z timlinux $";
 static const QString sName = QObject::tr("Coordinate Capture");
@@ -91,7 +92,8 @@ void CoordinateCapture::initGui()
 
   // create our map tool
   mpMapTool = new CoordinateCaptureMapTool(mQGisIface->getMapCanvas());
-  connect(mpMapTool, SIGNAL(pointCaptured(QgsPoint)), this, SLOT(update(QgsPoint)));
+  connect(mpMapTool, SIGNAL(mouseMoved(QgsPoint)), this, SLOT(mouseMoved(QgsPoint)));
+  connect(mpMapTool, SIGNAL(mouseClicked(QgsPoint)), this, SLOT(mouseClicked(QgsPoint)));
 
 
   // create a little widget with x and y display to put into our dock widget
@@ -102,22 +104,33 @@ void CoordinateCapture::initGui()
 
   QLabel * mypGeoLabel = new QLabel(mypWidget);
   mypGeoLabel->setPixmap(QPixmap(":/coordinatecapture/geographic.png"));
-  mypGeoLabel->setToolTip(tr("Coordinate in lat/long WGS84"));
+
   QLabel * mypCRSLabel = new QLabel(mypWidget);
   mypCRSLabel->setPixmap(QPixmap(":/coordinatecapture/transformed.png"));
-  mypGeoLabel->setToolTip(tr("Coordinate in map canvas coordinate reference system"));
+
   mpGeoEdit = new QLineEdit(mypWidget);
   mpGeoEdit->setReadOnly(true);
+  mpGeoEdit->setToolTip(tr("Coordinate in lat/long WGS84"));
+
   mpTransformedEdit = new QLineEdit(mypWidget);
   mpTransformedEdit->setReadOnly(true);
+  mpTransformedEdit->setToolTip(tr("Coordinate in map canvas coordinate reference system"));
+
   QPushButton * mypCopyButton = new QPushButton(mypWidget);
   mypCopyButton->setText(tr("Copy to clipboard"));
   connect(mypCopyButton, SIGNAL(clicked()), this, SLOT(copy()));
 
+  mpTrackMouseButton = new QToolButton(mypWidget);
+  mpTrackMouseButton->setCheckable(true);
+  mpTrackMouseButton->setToolTip(tr("Click to enable mouse tracking. Click the canvas to stop"));
+  mpTrackMouseButton->setChecked(false);
+  mpTrackMouseButton->setIcon(QIcon(":/coordinatecapture/tracking.png"));
+
   mypLayout->addWidget(mypGeoLabel, 0,0);
   mypLayout->addWidget(mpGeoEdit, 0,1);
   mypLayout->addWidget(mypCRSLabel, 1,0);
   mypLayout->addWidget(mpTransformedEdit, 1,1);
+  mypLayout->addWidget(mpTrackMouseButton, 2,0);
   mypLayout->addWidget(mypCopyButton, 2,1);
 
 
@@ -130,14 +143,29 @@ void CoordinateCapture::initGui()
   // now add our custom widget to the dock - ownership of the widget is passed to the dock
   mpDockWidget->setWidget(mypWidget);
 
-
 }
+
 //method defined in interface
 void CoordinateCapture::help()
 {
   //implement me!
 }
-
+void CoordinateCapture::mouseClicked(QgsPoint thePoint)
+{
+  //clicking on the canvas will update the widgets and then disable 
+  //tracking so the user can copy the click point coords
+  mpTrackMouseButton->setChecked(false);
+  update(thePoint);
+}
+void CoordinateCapture::mouseMoved(QgsPoint thePoint)
+{
+  //mouse movements will only update the widgets if the
+  //tracking button is checked
+  if(mpTrackMouseButton->isChecked())
+  {
+    update(thePoint);
+  }
+}
 void CoordinateCapture::update(QgsPoint thePoint)
 {
   //this is the coordinate resolved back to lat / lon

src/plugins/coordinate_capture/coordinatecapture.h

@@ -47,6 +47,7 @@
 //forward declarations
 class QAction;
 class QToolBar;
+class QToolButton;
 class QDockWidget;
 class QLineEdit;
 
@@ -87,6 +88,11 @@ public slots:
   void unload();
   //! show the help document
   void help();
+  //! Called when mouse clicks on the canvas. Will populate text box with coords.
+  void mouseClicked(QgsPoint thePoint);
+  /** Called when mouse moved over the canvas. If the tracking button is toggled,
+   * the text box coords will be updated. */
+  void mouseMoved(QgsPoint thePoint);
   //! Called when mouse is clicked on the canvas
   void update(QgsPoint thePoint);
   //! Called when user clicks the copy button
@@ -106,6 +112,9 @@ public slots:
   //!Our custom map tool to capture clicks
   CoordinateCaptureMapTool * mpMapTool;
 
+  //!A toolbutton to keep track whether mouse tracking is enabled
+  QToolButton * mpTrackMouseButton;
+
   ////////////////////////////////////////////////////////////////////
   //
   // MANDATORY PLUGIN PROPERTY DECLARATIONS  .....

src/plugins/coordinate_capture/coordinatecapture.qrc

@@ -3,5 +3,6 @@
         <file>coordinate_capture.png</file>
         <file>geographic.png</file>
         <file>transformed.png</file>
+        <file>tracking.png</file>
     </qresource>
 </RCC>

src/plugins/coordinate_capture/coordinatecapturemaptool.cpp

@@ -45,8 +45,11 @@ CoordinateCaptureMapTool::~CoordinateCaptureMapTool()
   delete mpRubberBand;
 }
 
-void CoordinateCaptureMapTool::canvasMoveEvent(QMouseEvent * e)
+void CoordinateCaptureMapTool::canvasMoveEvent(QMouseEvent * thepEvent)
 {
+  QgsPoint myOriginalPoint = 
+    mCanvas->getCoordinateTransform()->toMapCoordinates(thepEvent->x(), thepEvent->y());
+  emit mouseMoved(myOriginalPoint);
 }
 
 void CoordinateCaptureMapTool::canvasPressEvent(QMouseEvent * thepEvent)
@@ -62,7 +65,7 @@ void CoordinateCaptureMapTool::canvasReleaseEvent(QMouseEvent * thepEvent)
 
   QgsPoint myOriginalPoint = 
     mCanvas->getCoordinateTransform()->toMapCoordinates(thepEvent->x(), thepEvent->y());
-  emit pointCaptured(myOriginalPoint);
+  emit mouseClicked(myOriginalPoint);
 
   //make a little box for display
 

src/plugins/coordinate_capture/coordinatecapturemaptool.h

@@ -52,7 +52,8 @@ class CoordinateCaptureMapTool : public QgsMapTool
   public slots:
 
   signals:
-    void pointCaptured(QgsPoint);
+    void mouseMoved(QgsPoint);
+    void mouseClicked(QgsPoint);
   private:
 
     //! Rubber band for highlighting identified feature