connected help button on the buffer dialog to display help stored in <prefix>/share/doc/plugins/geoprocessing/buffer

git-svn-id: http://svn.osgeo.org/qgis/trunk@743 c8812cc2-4d05-0410-92ff-de0c093fc19c

plugins/geoprocessing/qgsdlgpgbuffer.cpp

@@ -24,9 +24,10 @@
 #include <qcombobox.h>
 #include "qgsdlgpgbuffer.h"
 #include <qspinbox.h>
+#include "../../src/qgisiface.h"
 
-QgsDlgPgBuffer::QgsDlgPgBuffer(QWidget * parent, const char *name)
+QgsDlgPgBuffer::QgsDlgPgBuffer( QgisIface * _qI, QWidget * parent, const char *name)
-:QgsDlgPgBufferBase(parent, name)
+:QgsDlgPgBufferBase(parent, name),qI(_qI)
 {
 }
 
@@ -97,3 +98,7 @@ void QgsDlgPgBuffer::setGeometryColumn(QString name)
 {
     txtGeometryColumn->setText(name);
 }
+void QgsDlgPgBuffer::help()
+{
+   qI->openURL("plugins/geoprocessing/buffer/index.html",true);
+}

plugins/geoprocessing/qgsdlgpgbuffer.h

@@ -21,11 +21,12 @@
 #ifndef QGSDLGPGBUFFER_H
 #define QGSDLGPGBUFFER_H
 #include "qgsdlgpgbufferbase.h"
+class QgisIface;
 class QgsDlgPgBuffer:public QgsDlgPgBufferBase
 {
   Q_OBJECT public:
   //! Constructor
-    QgsDlgPgBuffer(QWidget * parent = 0, const char *name = 0);
+    QgsDlgPgBuffer( QgisIface * _qI = 0, QWidget * parent = 0, const char *name = 0);
     //! Destructor
     QgsDlgPgBuffer::~QgsDlgPgBuffer();
     //! Set the information label in the dialog
@@ -54,5 +55,10 @@ class QgsDlgPgBuffer:public QgsDlgPgBufferBase
     void setBufferLayerName(QString name);
     //! Set the geometry column on the dialog
     void setGeometryColumn(QString name);
+    public slots:
+    void help();
+    private:
+      //! Pointer to the QGIS interface object
+    QgisIface *qI;
 };
 #endif // QGSDLGPGBUFFER_H

plugins/geoprocessing/qgsdlgpgbufferbase.ui

@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.3" stdsetdef="1">
 <class>QgsDlgPgBufferBase</class>
 <widget class="QDialog">
     <property name="name">
@@ -9,7 +9,7 @@
             <x>0</x>
             <y>0</y>
             <width>520</width>
-            <height>307</height>
+            <height>314</height>
         </rect>
     </property>
     <property name="caption">
@@ -363,6 +363,15 @@
         <receiver>QgsDlgPgBufferBase</receiver>
         <slot>reject()</slot>
     </connection>
+    <connection>
+        <sender>buttonHelp</sender>
+        <signal>clicked()</signal>
+        <receiver>QgsDlgPgBufferBase</receiver>
+        <slot>help()</slot>
+    </connection>
 </connections>
+<slots>
+    <slot>help()</slot>
+</slots>
 <layoutdefaults spacing="6" margin="11"/>
 </UI>

plugins/geoprocessing/qgspggeoprocessing.cpp

@@ -155,7 +155,8 @@ void QgsPgGeoprocessing::buffer()
             user = user.mid(user.find("=") + 1);
 
             // show dialog to fetch buffer distrance, new layer name, and option to
-            QgsDlgPgBuffer *bb = new QgsDlgPgBuffer();
+            QgsDlgPgBuffer *bb = new QgsDlgPgBuffer(qI);
+            
             // set the label
             QString lbl = tr("Buffer features in layer %1").arg(tableName);
             bb->setBufferLabel(lbl);
@@ -416,7 +417,6 @@ void QgsPgGeoprocessing::unload()
     menu->removeItem(menuId);
     delete toolBar;
 }
-
 /** 
 * Required extern functions needed  for every plugin 
 * These functions can be called prior to creating an instance

plugins/geoprocessing/qgspggeoprocessing.h

@@ -77,6 +77,8 @@ class QgsPgGeoprocessing:public QObject, public QgisPlugin
     void buffer();
     //! unload the plugin
     void unload();
+    //! show the help document
+    void help();
   private:
   //! get postgis version string
    QString postgisVersion(PGconn *);
@@ -86,6 +88,7 @@ class QgsPgGeoprocessing:public QObject, public QgisPlugin
   bool hasGIST(PGconn *);
   //! get status of PROJ4 capability
   bool hasPROJ(PGconn *);
+  
   QString postgisVersionInfo;
   bool geosAvailable;
   bool gistAvailable;