Recent projects preview image

src/core/CMakeLists.txt

@@ -78,6 +78,7 @@ set(QFIELD_CORE_SRCS
  printlayoutlistmodel.cpp
  projectinfo.cpp
  projectsource.cpp
+ projectsimageprovider.cpp
  qfieldappauthrequesthandler.cpp
  qfieldcloudconnection.cpp
  qfieldcloudprojectsmodel.cpp
@@ -184,6 +185,7 @@ set(QFIELD_CORE_HDRS
  printlayoutlistmodel.h
  projectinfo.h
  projectsource.h
+ projectsimageprovider.h
  qfieldappauthrequesthandler.h
  qfieldcloudconnection.h
  qfieldcloudprojectsmodel.h

src/core/projectsimageprovider.cpp

@@ -0,0 +1,32 @@
+/***************************************************************************
+ localfilesimageprovider.cpp - LocalFilesImageProvider
+
+ ---------------------
+ begin : 18.05.2022
+ copyright : (C) 2022 by Mathieu Pellerin
+ email : mathieu at opengis dot ch
+ ***************************************************************************
+ * *
+ * 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. *
+ * *
+ ***************************************************************************/
+
+#include "projectsimageprovider.h"
+
+#include <QFileInfo>
+
+ProjectsImageProvider::ProjectsImageProvider()
+ : QQuickImageProvider( Pixmap )
+{
+}
+
+QImage ProjectsImageProvider::requestImage( const QString &id, QSize *size, const QSize &requestedSize )
+{
+ // the id is passed on as an encoded URL string which needs decoding
+ const QString path = QUrl::fromPercentEncoding( id.toUtf8() );
+ const QString previewPath = QStringLiteral( "%1.jpg" ).arg( path );
+ return QFileInfo::exists( previewPath ) ? QImage( previewPath ) : QImage();
+}

src/core/projectsimageprovider.h

@@ -0,0 +1,30 @@
+/***************************************************************************
+ projectsimageprovider.h - ProjectsImageProvider
+
+ ---------------------
+ begin : 15.07.2023
+ copyright : (C) 2023 by Mathieu Pellerin
+ email : mathieu at opengis dot ch
+ ***************************************************************************
+ * *
+ * 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. *
+ * *
+ ***************************************************************************/
+#ifndef PROJECTSIMAGEPROVIDER_H
+#define PROJECTSIMAGEPROVIDER_H
+
+#include <QQuickImageProvider>
+
+class ProjectsImageProvider : public QQuickImageProvider
+{
+ public:
+ explicit ProjectsImageProvider();
+
+ QQmlImageProviderBase::ImageType imageType() const override { return QQmlImageProviderBase::Image; }
+ QImage requestImage( const QString &id, QSize *size, const QSize &requestedSize ) override;
+};
+
+#endif // PROJECTSIMAGEPROVIDER_H

src/core/qgismobileapp.cpp

@@ -85,6 +85,7 @@
 #include "positioningutils.h"
 #include "printlayoutlistmodel.h"
 #include "projectinfo.h"
+#include "projectsimageprovider.h"
 #include "projectsource.h"
 #include "qfield.h"
 #include "qfieldcloudconnection.h"
@@ -258,6 +259,7 @@ QgisMobileapp::QgisMobileapp( QgsApplication *app, QObject *parent )
  mFlatLayerTree = new FlatLayerTreeModel( mProject->layerTreeRoot(), mProject, this );
  mLegendImageProvider = new LegendImageProvider( mFlatLayerTree->layerTreeModel() );
  mLocalFilesImageProvider = new LocalFilesImageProvider();
+ mProjectsImageProvider = new ProjectsImageProvider();
  mTrackingModel = new TrackingModel;
 
  mBookmarkModel = std::make_unique<BookmarkModel>( QgsApplication::bookmarkManager(), mProject->bookmarkManager(), nullptr );
@@ -547,6 +549,7 @@ void QgisMobileapp::initDeclarative()
 
  addImageProvider( QLatin1String( "legend" ), mLegendImageProvider );
  addImageProvider( QLatin1String( "localfiles" ), mLocalFilesImageProvider );
+ addImageProvider( QLatin1String( "projects" ), mProjectsImageProvider );
 }
 
 void QgisMobileapp::loadProjectQuirks()
@@ -652,6 +655,18 @@ void QgisMobileapp::onAfterFirstRendering()
  }
 }
 
+void QgisMobileapp::onMapCanvasRefreshed()
+{
+ disconnect( mMapCanvas, &QgsQuickMapCanvasMap::mapCanvasRefreshed, this, &QgisMobileapp::onMapCanvasRefreshed );
+ if ( !mProjectFilePath.isEmpty() )
+ {
+ if ( !QFileInfo::exists( QStringLiteral( "%1.jpg" ).arg( mProjectFilePath ) ) )
+ {
+ saveProjectPreviewImage();
+ }
+ }
+}
+
 bool QgisMobileapp::loadProjectFile( const QString &path, const QString &name )
 {
  QFileInfo fi( path );
@@ -664,6 +679,8 @@ bool QgisMobileapp::loadProjectFile( const QString &path, const QString &name )
  const QString suffix = fi.suffix().toLower();
  if ( SUPPORTED_PROJECT_EXTENSIONS.contains( suffix ) || SUPPORTED_VECTOR_EXTENSIONS.contains( suffix ) || SUPPORTED_RASTER_EXTENSIONS.contains( suffix ) )
  {
+ saveProjectPreviewImage();
+
  mAuthRequestHandler->clearStoredRealms();
 
  mProjectFilePath = path;
@@ -1182,6 +1199,8 @@ void QgisMobileapp::readProjectFile()
  }
 
  emit loadProjectEnded( mProjectFilePath, mProjectFileName );
+
+ connect( mMapCanvas, &QgsQuickMapCanvasMap::mapCanvasRefreshed, this, &QgisMobileapp::onMapCanvasRefreshed );
 }
 
 QString QgisMobileapp::readProjectEntry( const QString &scope, const QString &key, const QString &def ) const
@@ -1390,6 +1409,18 @@ bool QgisMobileapp::event( QEvent *event )
  return QQmlApplicationEngine::event( event );
 }
 
+void QgisMobileapp::saveProjectPreviewImage()
+{
+ if ( !mProjectFilePath.isEmpty() && mMapCanvas && !mMapCanvas->isRendering() )
+ {
+ const QImage grab = mMapCanvas->image();
+ const int pixels = std::min( grab.width(), grab.height() );
+ const QRect rect( ( grab.width() - pixels ) / 2, ( grab.height() - pixels ) / 2, pixels, pixels );
+ const QImage img = grab.copy( rect );
+ img.save( QStringLiteral( "%1.jpg" ).arg( mProjectFilePath ) );
+ }
+}
+
 void QgisMobileapp::requestQuit()
 {
  mApp->exitQgis();
@@ -1398,6 +1429,7 @@ void QgisMobileapp::requestQuit()
 
 QgisMobileapp::~QgisMobileapp()
 {
+ saveProjectPreviewImage();
  delete mOfflineEditing;
  mProject->removeAllMapLayers();
  delete mProject;

src/core/qgismobileapp.h

@@ -50,6 +50,7 @@ class FlatLayerTreeModel;
 class LayerTreeModel;
 class LegendImageProvider;
 class LocalFilesImageProvider;
+class ProjectsImageProvider;
 class TrackingModel;
 class LocatorFiltersModel;
 class QgsProject;
@@ -185,12 +186,13 @@ class QFIELD_CORE_EXPORT QgisMobileapp : public QQmlApplicationEngine
  private slots:
 
  void onAfterFirstRendering();
-
+ void onMapCanvasRefreshed();
  void requestQuit();
 
  private:
  void initDeclarative();
  void loadProjectQuirks();
+ void saveProjectPreviewImage();
  bool printAtlas( QgsPrintLayout *layoutToPrint, const QString &destination );
 
  QgsOfflineEditing *mOfflineEditing = nullptr;
@@ -203,6 +205,7 @@ class QFIELD_CORE_EXPORT QgisMobileapp : public QQmlApplicationEngine
  bool mFirstRenderingFlag;
  LegendImageProvider *mLegendImageProvider = nullptr;
  LocalFilesImageProvider *mLocalFilesImageProvider = nullptr;
+ ProjectsImageProvider *mProjectsImageProvider = nullptr;
 
  QgsProject *mProject = nullptr;
  QString mProjectFilePath;

src/core/qgsquick/qgsquickmapcanvasmap.h

@@ -115,6 +115,11 @@ class QgsQuickMapCanvasMap : public QQuickItem
  //! \copydoc QgsQuickMapCanvasMap::incrementalRendering
  void setIncrementalRendering( bool incrementalRendering );
 
+ /**
+ * Returns an image of the last successful map canvas rendering
+ */
+ const QImage image() const { return mImage; }
+
  signals:
 
  /**

src/qml/QFieldCloudScreen.qml

@@ -249,6 +249,7 @@ Page {
  delegate: Rectangle {
  id: rectangle
 
+ property bool isPressed: false
  property string projectId: Id
  property string projectOwner: Owner
  property string projectName: Name
@@ -328,6 +329,7 @@ Page {
  font.pointSize: Theme.tipFont.pointSize
  font.underline: true
  color: Theme.mainColor
+ opacity: rectangle.isPressed ? 0.8 : 1
  wrapMode: Text.WordWrap
  Layout.fillWidth: true
  }
@@ -440,19 +442,19 @@ Page {
  table.contentY + mouse.y
  )
  if (item) {
- pressedItem = item.children[1].children[1].children[0];
- pressedItem.color = "#5a8725"
+ pressedItem = item
+ pressedItem.isPressed = true
  }
  }
  onCanceled: {
  if (pressedItem) {
- pressedItem.color = Theme.mainColor
+ pressedItem.isPressed = false
  pressedItem = null
  }
  }
  onReleased: {
  if (pressedItem) {
- pressedItem.color = Theme.mainColor
+ pressedItem.isPressed = false
  pressedItem = null
  }
  }