From 559a28a6de24b03c7656f9c2db1ff2abba0fe9a1 Mon Sep 17 00:00:00 2001
From: homann <homann@c8812cc2-4d05-0410-92ff-de0c093fc19c>
Date: Fri, 2 Mar 2007 21:04:19 +0000
Subject: [PATCH] Added input so that user can set specific scale. Set focus in
 the linedit showing scale, enter your scale and hit return!

git-svn-id: http://svn.osgeo.org/qgis/trunk@6747 c8812cc2-4d05-0410-92ff-de0c093fc19c
---
 src/app/qgisapp.cpp      | 38 ++++++++++++++++++++++++++++++--------
 src/app/qgisapp.h        |  9 +++++++--
 src/gui/qgsmapcanvas.cpp | 14 +++++---------
 src/gui/qgsmapcanvas.h   |  2 +-
 4 files changed, 43 insertions(+), 20 deletions(-)

diff --git a/src/app/qgisapp.cpp b/src/app/qgisapp.cpp
index c7f603baaa10..4544fbf47c34 100644
--- a/src/app/qgisapp.cpp
+++ b/src/app/qgisapp.cpp
@@ -1021,9 +1021,20 @@ void QgisApp::createStatusBar()
   mScaleLabel->setMinimumWidth(10);
   mScaleLabel->setMargin(3);
   mScaleLabel->setAlignment(Qt::AlignCenter);
-  QWhatsThis::add(mScaleLabel, tr("Displays the current map scale"));
-  QToolTip::add (mScaleLabel, tr("Current map scale"));
+//  QWhatsThis::add(mScaleLabel, tr("Displays the current map scale"));
+//  QToolTip::add (mScaleLabel, tr("Current map scale"));
   statusBar()->addWidget(mScaleLabel, 0,true);
+  mScaleEdit = new QLineEdit(QString(),statusBar());
+  mScaleEdit->setFont(myFont);
+  mScaleEdit->setMinimumWidth(10);
+  mScaleEdit->setMaximumWidth(100);
+  mScaleEdit->setMargin(0);
+  mScaleEdit->setAlignment(Qt::AlignLeft);
+  QWhatsThis::add(mScaleEdit, tr("Displays the current map scale"));
+  QToolTip::add (mScaleEdit, tr("Current map scale"));
+  statusBar()->addWidget(mScaleEdit, 0,true);
+  connect(mScaleEdit, SIGNAL(editingFinished()), this, SLOT(userScale()));
+
   //coords status bar widget
   mCoordsLabel = new QLabel(QString(), statusBar());
   mCoordsLabel->setMinimumWidth(10);
@@ -1161,8 +1172,8 @@ void QgisApp::setupConnections()
   connect(mMapCanvas->mapRender(), SIGNAL(projectionsEnabled(bool)), this, SLOT(projectionsEnabled(bool)));
   connect(mMapCanvas->mapRender(), SIGNAL(destinationSrsChanged()), this, SLOT(destinationSrsChanged()));
   connect(mMapCanvas, SIGNAL(extentsChanged()),this,SLOT(showExtents()));
-  connect(mMapCanvas, SIGNAL(scaleChanged(QString)), this, SLOT(showScale(QString)));
-  connect(mMapCanvas, SIGNAL(scaleChanged(QString)), this, SLOT(updateMouseCoordinatePrecision()));
+  connect(mMapCanvas, SIGNAL(scaleChanged(long)), this, SLOT(showScale(long)));
+  connect(mMapCanvas, SIGNAL(scaleChanged(long)), this, SLOT(updateMouseCoordinatePrecision()));
 
   connect(mRenderSuppressionCBox, SIGNAL(toggled(bool )), mMapCanvas, SLOT(setRenderFlag(bool)));
 }
@@ -3524,16 +3535,27 @@ void QgisApp::showMouseCoordinate(QgsPoint & p)
   }
 }
 
-void QgisApp::showScale(QString theScale)
+void QgisApp::showScale(long theScale)
 {
-  mScaleLabel->setText(theScale);
+  mScaleLabel->setText(tr("Scale 1: "));
+  mScaleEdit->setText(QString::number(theScale));
   // Set minimum necessary width
-  if ( mScaleLabel->width() > mScaleLabel->minimumWidth() )
+  if ( mScaleEdit->width() > mScaleEdit->minimumWidth() )
   {
-    mScaleLabel->setMinimumWidth(mScaleLabel->width());
+    mScaleEdit->setMinimumWidth(mScaleEdit->width());
   }
 }
 
+void QgisApp::userScale()
+{
+  bool ok;
+  double currentScale = mMapCanvas->getScale();
+  double wantedScale = mScaleEdit->text().toDouble(&ok);
+
+  if (ok)
+    mMapCanvas->zoom(wantedScale/currentScale);
+
+}
 void QgisApp::testButton()
 {
   /* QgsShapeFileLayer *sfl = new QgsShapeFileLayer("foo");
diff --git a/src/app/qgisapp.h b/src/app/qgisapp.h
index 6fa33e520e71..2475dfc69b1a 100644
--- a/src/app/qgisapp.h
+++ b/src/app/qgisapp.h
@@ -23,6 +23,7 @@ class QRect;
 class QStringList;
 class QCursor;
 class QLabel;
+class QLineEdit;
 class QProgressBar;
 class QFileInfo;
 class QSettings;
@@ -174,7 +175,9 @@ public slots:
   //copy the click coord to clipboard and let the user know its there
   void showCapturePointCoordinate(QgsPoint &);
   //! Slot to show current map scale;
-  void showScale(QString theScale);
+  void showScale(long theScale);
+  //! Slot to handle user scale input;
+  void userScale();
   //! Remove a layer from the map and legend
   void removeLayer();
   //! zoom to extent of layer
@@ -540,8 +543,10 @@ public slots:
   //!The name of the active theme
   QString mThemeName;
 
-  //! Widget that will live on the statusbar to display scale
+  //! Widget that will live on the statusbar to display "scale 1:"
   QLabel * mScaleLabel;
+  //! Widget that will live on the statusbar to display scale value
+  QLineEdit * mScaleEdit;
   //! Widget that will live in the statusbar to display coords
   QLabel * mCoordsLabel;
   //! Widget that will live in the statusbar to show progress of operations
diff --git a/src/gui/qgsmapcanvas.cpp b/src/gui/qgsmapcanvas.cpp
index 47c703c2bab5..ae1a66f65562 100644
--- a/src/gui/qgsmapcanvas.cpp
+++ b/src/gui/qgsmapcanvas.cpp
@@ -431,15 +431,11 @@ void QgsMapCanvas::setExtent(QgsRect const & r)
 void QgsMapCanvas::updateScale()
 {
   double scale = mMapRender->scale();
-  QString myScaleString = tr("Scale ");
-  int thePrecision = 0;
-  if (scale == 0)
-    myScaleString = "";
-  else if (scale >= 1)
-    myScaleString += QString("1: ") + QString::number(scale,'f',thePrecision);
-  else
-    myScaleString += QString::number(1.0/scale, 'f', thePrecision) + QString(": 1");
-  emit scaleChanged(myScaleString);
+
+  if (scale < 1)
+    emit scaleChanged(lround(-1.0/scale));
+  else 
+    emit scaleChanged(lround(scale));
 }
 
 
diff --git a/src/gui/qgsmapcanvas.h b/src/gui/qgsmapcanvas.h
index e9816dde73d4..a24ae0902f0e 100644
--- a/src/gui/qgsmapcanvas.h
+++ b/src/gui/qgsmapcanvas.h
@@ -277,7 +277,7 @@ class GUI_EXPORT QgsMapCanvas : public QGraphicsView
     void xyCoordinates(QgsPoint & p);
 
     //! Emitted when the scale of the map changes
-    void scaleChanged(QString);
+    void scaleChanged(long);
 
     //! Emitted when the extents of the map change
     void extentsChanged();