Added QgsFileDropEdit class which extends QLineEdit to accept files d…

…ropped on the edit field.

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6513 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/gui/CMakeLists.txt

@@ -5,6 +5,7 @@ qgisinterface.cpp
 qgscolorbutton.cpp
 qgscursors.cpp
 qgsencodingfiledialog.cpp
+qgsfiledropedit.cpp
 qgslayerprojectionselector.cpp
 qgsmapcanvas.cpp
 qgsmapcanvasitem.cpp

src/gui/qgsfiledropedit.cpp

@@ -0,0 +1,159 @@
+/***************************************************************************
+    qgsfiledropedit.cpp - File Dropable LineEdit
+     --------------------------------------
+    Date                 : 31-Jan-2007
+    Copyright            : (C) 2007 by Tom Elwertowski
+    Email                : telwertowski at users dot sourceforge dot net
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+/* $Id$ */
+
+#include "qgsfiledropedit.h"
+#include <QDropEvent>
+#include <QFileInfo>
+#include <QPainter>
+#include <QUrl>
+
+/*!
+  \class QgsFileDropEdit
+
+  \brief The QgsDropNameEdit class provides a line edit widget which
+  accepts file drops.
+
+  Dropping can be limited to files only, files with a specific extension
+  or directories only. By default, dropping is limited to files only.
+*/
+
+QgsFileDropEdit::QgsFileDropEdit(QWidget *parent)
+: QLineEdit(parent)
+{
+  mDirOnly = false;
+  mFileOnly = true;
+  mDragActive = false;
+  setAcceptDrops(true);
+}
+
+QgsFileDropEdit::~QgsFileDropEdit()
+{}
+
+/*!
+  Limit drops to directories.
+*/
+void QgsFileDropEdit::setDirOnly(bool dirOnly)
+{
+  mDirOnly = dirOnly;
+  if (mDirOnly)
+  {
+    mFileOnly = false;
+  }
+}
+
+/*!
+  Limit drops to files.
+*/
+void QgsFileDropEdit::setFileOnly(bool fileOnly)
+{
+  mFileOnly = fileOnly;
+  if (mFileOnly)
+  {
+    mDirOnly = false;
+  }
+}
+
+/*!
+  Limit drops to files with specified extension.
+*/
+void QgsFileDropEdit::setSuffixFilter(const QString& suffix)
+{
+  mSuffix = suffix;
+}
+
+/*!
+  Return file name if object meets drop criteria.
+*/
+QString QgsFileDropEdit::acceptableFilePath(QDropEvent *event) const
+{
+  QString path;
+  if (event->mimeData()->hasUrls())
+  {
+    QFileInfo file(event->mimeData()->urls().first().toLocalFile());
+    if ( !( mFileOnly && !file.isFile() ||
+        mDirOnly && !file.isDir() ||
+        !mSuffix.isEmpty() && mSuffix.compare(file.suffix(), Qt::CaseInsensitive) ) )
+      path = file.filePath();
+  }
+  return path;
+}
+
+/*!
+  Check if dragged object is acceptible. Called when a drag is in progress
+  and the mouse enters this widget.
+*/
+void QgsFileDropEdit::dragEnterEvent(QDragEnterEvent *event)
+{
+  QString filePath = acceptableFilePath(event);
+  if (!filePath.isEmpty())
+  {
+    event->acceptProposedAction();
+    mDragActive = true;
+    update();
+  }
+  else
+  {
+    QLineEdit::dragEnterEvent(event);
+  }
+}
+
+/*!
+  Called when a drag is in progress and the mouse leaves this widget.
+*/
+void QgsFileDropEdit::dragLeaveEvent(QDragLeaveEvent *event)
+{
+  QLineEdit::dragLeaveEvent(event);
+  event->accept();
+  mDragActive = false;
+  update();
+}
+
+/*!
+  Receive the dragged object. Called when the drag is dropped on this widget.
+*/
+void QgsFileDropEdit::dropEvent(QDropEvent *event)
+{
+  QString filePath = acceptableFilePath(event);
+  if (!filePath.isEmpty())
+  {
+    setText(filePath);
+    selectAll();
+    setFocus(Qt::MouseFocusReason);
+    event->acceptProposedAction();
+    mDragActive = false;
+    update();
+  }
+  else
+  {
+    QLineEdit::dropEvent(event);
+  }
+}
+
+/*!
+  Paints line edit with drag highlight in response to a paint event.
+*/
+void QgsFileDropEdit::paintEvent(QPaintEvent *e)
+{
+  QLineEdit::paintEvent(e);
+  if (mDragActive)
+  {
+    QPainter p(this);
+    int width = 2;  // width of highlight rectangle inside frame
+    p.setPen(QPen(palette().highlight(), width));
+    QRect r = rect().adjusted(width, width, -width, -width);
+    p.drawRect(r);
+  }
+}

src/gui/qgsfiledropedit.h

@@ -0,0 +1,52 @@
+/***************************************************************************
+    qgsfiledropedit.h - File Dropable LineEdit
+     --------------------------------------
+    Date                 : 31-Jan-2007
+    Copyright            : (C) 2007 by Tom Elwertowski
+    Email                : telwertowski at users dot sourceforge dot net
+ ***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+/* $Id$ */
+#ifndef QGSFILEDROPEDIT_H
+#define QGSFILEDROPEDIT_H
+
+#include <QLineEdit>
+
+class GUI_EXPORT QgsFileDropEdit: public QLineEdit
+{
+  public:
+    QgsFileDropEdit(QWidget *parent = 0);
+    virtual ~QgsFileDropEdit();
+
+    bool dirOnly() const { return mDirOnly; }
+    void setDirOnly(bool dirOnly);
+
+    bool fileOnly() const { return mFileOnly; }
+    void setFileOnly(bool fileOnly);
+
+	const QString& suffixFilter() const { return mSuffix; }
+    void setSuffixFilter( const QString& suffix);
+
+  protected:
+
+    virtual void dragEnterEvent(QDragEnterEvent *event);
+    virtual void dragLeaveEvent(QDragLeaveEvent *event);
+    virtual void dropEvent(QDropEvent *event);
+    virtual void paintEvent(QPaintEvent *e);
+
+  private:
+    QString acceptableFilePath(QDropEvent *event) const;
+
+    QString mSuffix;
+    bool mDirOnly;
+    bool mFileOnly;
+    bool mDragActive;
+};
+
+#endif

src/plugins/delimited_text/qgsdelimitedtextplugingui.cpp

@@ -34,6 +34,7 @@ QgsDelimitedTextPluginGui::QgsDelimitedTextPluginGui(QgisInterface * _qI, QWidge
   pbnOK = buttonBox->button(QDialogButtonBox::Ok);
   pbnParse = buttonBox->addButton(tr("Parse"), QDialogButtonBox::ActionRole);
   connect(pbnParse, SIGNAL(clicked()), this, SLOT(on_pbnParse_clicked()));
+  connect(txtFilePath, SIGNAL(textChanged(const QString&)), this, SLOT(on_pbnParse_clicked()));
   enableButtons();
   // at startup, fetch the last used delimiter and directory from
   // settings

src/plugins/delimited_text/qgsdelimitedtextpluginguibase.ui

@@ -216,7 +216,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QLineEdit" name="txtFilePath" >
+      <widget class="QgsFileDropEdit" name="txtFilePath" >
        <property name="toolTip" >
         <string>Full path to the delimited text file</string>
        </property>
@@ -332,6 +332,11 @@
    <header>Qt3Support/Q3GroupBox</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsFileDropEdit</class>
+   <extends>QLineEdit</extends>
+   <header>qgsfiledropedit.h</header>
+  </customwidget>
   <customwidget>
    <class>Q3TextEdit</class>
    <extends>Q3Frame</extends>

src/plugins/georeferencer/pluginguibase.ui

@@ -1,7 +1,4 @@
 <ui version="4.0" >
- <author></author>
- <comment></comment>
- <exportmacro></exportmacro>
  <class>QgsGeorefPluginGuiBase</class>
  <widget class="QDialog" name="QgsGeorefPluginGuiBase" >
   <property name="geometry" >
@@ -125,12 +122,12 @@
       </sizepolicy>
      </property>
      <property name="text" >
-      <string>...</string>
+      <string>Browse...</string>
      </property>
     </widget>
    </item>
    <item row="1" column="3" >
-    <widget class="QLineEdit" name="leSelectRaster" >
+    <widget class="QgsFileDropEdit" name="leSelectRaster" >
      <property name="sizePolicy" >
       <sizepolicy>
        <hsizetype>7</hsizetype>
@@ -144,7 +141,13 @@
   </layout>
  </widget>
  <layoutdefault spacing="6" margin="11" />
- <pixmapfunction></pixmapfunction>
+ <customwidgets>
+  <customwidget>
+   <class>QgsFileDropEdit</class>
+   <extends>QLineEdit</extends>
+   <header>qgsfiledropedit.h</header>
+  </customwidget>
+ </customwidgets>
  <resources>
   <include location="georeferencer.qrc" />
  </resources>

src/plugins/georeferencer/qgspointdialogbase.ui

@@ -228,14 +228,14 @@
    <item row="2" column="7" >
     <widget class="QPushButton" name="pbnSelectModifiedRaster" >
      <property name="text" >
-      <string>...</string>
+      <string>Save As...</string>
      </property>
     </widget>
    </item>
    <item row="3" column="7" >
     <widget class="QPushButton" name="pbnSelectWorldFile" >
      <property name="text" >
-      <string>...</string>
+      <string>Save As...</string>
      </property>
     </widget>
    </item>

src/plugins/gps_importer/qgsgpsplugingui.cpp

@@ -61,7 +61,11 @@ QgsGPSPluginGui::QgsGPSPluginGui(const BabelMap& importers,
    this, SLOT(enableRelevantControls()));
   connect(tabWidget, SIGNAL(currentChanged(int)), 
    this, SLOT(enableRelevantControls()));
-} 
+
+  // drag and drop filter
+  leGPXFile->setSuffixFilter("gpx");
+}
+
 QgsGPSPluginGui::~QgsGPSPluginGui()
 {
 }
@@ -139,7 +143,8 @@ void QgsGPSPluginGui::on_pbnDLOutput_clicked()
 				 tr("Choose a filename to save under"),
                  "." , //initial dir
 				 tr("GPS eXchange format (*.gpx)"));
-  leDLOutput->setText(myFileNameQString);
+  if (!myFileNameQString.isEmpty())
+    leDLOutput->setText(myFileNameQString);
 }
 
 
@@ -220,7 +225,8 @@ void QgsGPSPluginGui::on_pbnGPXSelectFile_clicked()
           myFilterString, //filters to select
           &myFileTypeQString); //the pointer to store selected filter
   QgsLogger::debug("Selected filetype filter is : " + myFileTypeQString);
-  leGPXFile->setText(myFileNameQString);
+  if (!myFileNameQString.isEmpty())
+    leGPXFile->setText(myFileNameQString);
 }
 
 
@@ -232,23 +238,26 @@ void QgsGPSPluginGui::on_pbnIMPInput_clicked() {
           ".", //initial dir
           mBabelFilter,
           &myFileType); //the pointer to store selected filter
-  mImpFormat = myFileType.left(myFileType.length() - 6);
-  std::map<QString, QgsBabelFormat*>::const_iterator iter;
-  iter = mImporters.find(mImpFormat);
-  if (iter == mImporters.end()) {
-    QgsLogger::warning("Unknown file format selected: " +
-                       myFileType.left(myFileType.length() - 6));
-  }
-  else {
-    QgsLogger::debug(iter->first + " selected");
-    leIMPInput->setText(myFileName);
-    cmbIMPFeature->clear();
-    if (iter->second->supportsWaypoints())
-      cmbIMPFeature->insertItem("Waypoints");
-    if (iter->second->supportsRoutes())
-      cmbIMPFeature->insertItem("Routes");    
-    if (iter->second->supportsTracks())
-      cmbIMPFeature->insertItem("Tracks");
+  if (!myFileName.isEmpty())
+  {
+    mImpFormat = myFileType.left(myFileType.length() - 6);
+    std::map<QString, QgsBabelFormat*>::const_iterator iter;
+    iter = mImporters.find(mImpFormat);
+    if (iter == mImporters.end()) {
+      QgsLogger::warning("Unknown file format selected: " +
+                         myFileType.left(myFileType.length() - 6));
+    }
+    else {
+      QgsLogger::debug(iter->first + " selected");
+      leIMPInput->setText(myFileName);
+      cmbIMPFeature->clear();
+      if (iter->second->supportsWaypoints())
+        cmbIMPFeature->insertItem("Waypoints");
+      if (iter->second->supportsRoutes())
+        cmbIMPFeature->insertItem("Routes");    
+      if (iter->second->supportsTracks())
+        cmbIMPFeature->insertItem("Tracks");
+    }
   }
 }
 
@@ -259,7 +268,8 @@ void QgsGPSPluginGui::on_pbnIMPOutput_clicked() {
 				 tr("Choose a filename to save under"),
                  ".", //initial dir
 				 tr("GPS eXchange format (*.gpx)"));
-  leIMPOutput->setText(myFileNameQString);
+  if (!myFileNameQString.isEmpty())
+    leIMPOutput->setText(myFileNameQString);
 }