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wonder-skwonder-sk
committedJan 7, 2015
Merge pull request #1755 from wonder-sk/multiple-styles
[FEATURE] Support for multiple styles per map layer Available in legend context menu in Styles sub-menu where it is possible to add/remove styles and quickly switch between them.
·
ltr-3_40archive/master_2
2 parents 0b954c1 + 2144be0 commit 3ce9c70

18 files changed

+846
-11
lines changed
 

‎python/core/core.sip

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@@ -54,6 +54,7 @@
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%Include qgsmaplayerlegend.sip
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%Include qgsmaplayerregistry.sip
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%Include qgsmaplayerrenderer.sip
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%Include qgsmaplayerstylemanager.sip
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%Include qgsmaprenderer.sip
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%Include qgsmaprenderercache.sip
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%Include qgsmaprenderercustompainterjob.sip

‎python/core/qgsmaplayer.sip

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@@ -370,6 +370,21 @@ class QgsMapLayer : QObject
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*/
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QgsMapLayerLegend* legend() const;
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/**
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* Enable or disable layer's style manager. When disabled (default), the styleManager() will return null pointer.
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* By enabling the style manager will be created with one default style (same as the layer's active style).
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* By disabling the style manager all associated styles will be lost (only the layer's active style will stay).
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* @note added in 2.8
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*/
379+
void enableStyleManager( bool enable = true );
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/**
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* Get access to the layer's style manager. Style manager allows switching between multiple styles.
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* If the style manager is not enabled, null pointer will be returned.
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* @note added in 2.8
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*/
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QgsMapLayerStyleManager* styleManager() const;
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/**Returns the minimum scale denominator at which the layer is visible.
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* Scale based visibility is only used if hasScaleBasedVisibility is true.
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* @returns minimum scale denominator at which the layer will render
@@ -517,6 +532,11 @@ class QgsMapLayer : QObject
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/** Write custom properties to project file. */
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void writeCustomProperties( QDomNode & layerNode, QDomDocument & doc ) const;
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/** Read style manager's configuration (if any). To be called by subclasses. */
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void readStyleManager( const QDomNode& layerNode );
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/** Write style manager's configuration (if exists). To be called by subclasses. */
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void writeStyleManager( QDomNode& layerNode, QDomDocument& doc ) const;
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/** debugging member - invoked when a connect() is made to this object */
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void connectNotify( const char * signal );
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‎python/core/qgsmaplayerstylemanager.sip

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class QgsMapLayerStyle
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{
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%TypeHeaderCode
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#include <qgsmaplayerstylemanager.h>
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%End
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public:
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//! construct invalid style
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QgsMapLayerStyle();
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//! Tell whether the style is valid (i.e. there is something stored in it)
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bool isValid() const;
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//! Return information about the style - for debugging purposes only
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QString dump() const;
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//! Store layer's active style information in the instance
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void readFromLayer( QgsMapLayer* layer );
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//! Apply stored layer's style information to the layer
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void writeToLayer( QgsMapLayer* layer ) const;
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//! Read style configuration (for project file reading)
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void readXml( const QDomElement& styleElement );
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//! Write style configuration (for project file writing)
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void writeXml( QDomElement& styleElement ) const;
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};
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class QgsMapLayerStyleManager
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{
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%TypeHeaderCode
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#include <qgsmaplayerstylemanager.h>
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%End
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public:
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//! Construct a style manager associated with a map layer (must not be null)
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QgsMapLayerStyleManager( QgsMapLayer* layer );
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//! Read configuration (for project loading)
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void readXml( const QDomElement& mgrElement );
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//! Write configuration (for project saving)
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void writeXml( QDomElement& mgrElement ) const;
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//! Return list of all defined style names
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QStringList styles() const;
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//! Return data of a stored style - accessed by its unique name
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QgsMapLayerStyle style( const QString& name ) const;
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//! Add a style with given name and data
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//! @return true on success (name is unique and style is valid)
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bool addStyle( const QString& name, const QgsMapLayerStyle& style );
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//! Add style by cloning the current one
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//! @return true on success
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bool addStyleFromLayer( const QString& name );
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//! Remove a stored style
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//! @return true on success (style exists and it is not the last one)
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bool removeStyle( const QString& name );
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//! Return name of the current style
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QString currentStyle() const;
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//! Set a different style as the current style - will apply it to the layer
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//! @return true on success
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bool setCurrentStyle( const QString& name );
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};

‎src/app/CMakeLists.txt

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@@ -45,6 +45,7 @@ SET(QGIS_APP_SRCS
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qgslabelinggui.cpp
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qgslabelpreview.cpp
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qgsloadstylefromdbdialog.cpp
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qgsmaplayerstyleguiutils.cpp
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qgsmapmouseevent.cpp
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qgssavestyletodbdialog.cpp
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qgsguivectorlayertools.cpp
@@ -200,6 +201,7 @@ SET (QGIS_APP_MOC_HDRS
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qgslabelinggui.h
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qgslabelpropertydialog.h
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qgsloadstylefromdbdialog.h
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qgsmaplayerstyleguiutils.h
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qgssavestyletodbdialog.h
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qgsshortcutsmanager.h
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qgsapplayertreeviewmenuprovider.h

‎src/app/qgisapp.cpp

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@@ -149,6 +149,7 @@
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#include "qgsmapcanvas.h"
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#include "qgsmaplayer.h"
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#include "qgsmaplayerregistry.h"
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#include "qgsmaplayerstyleguiutils.h"
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#include "qgsmapoverviewcanvas.h"
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#include "qgsmaprenderer.h"
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#include "qgsmapsettings.h"
@@ -897,6 +898,8 @@ QgisApp::~QgisApp()
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delete QgsProject::instance();
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delete mPythonUtils;
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QgsMapLayerStyleGuiUtils::cleanup();
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}
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void QgisApp::dragEnterEvent( QDragEnterEvent *event )

‎src/app/qgsapplayertreeviewmenuprovider.cpp

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@@ -7,6 +7,7 @@
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#include "qgslayertree.h"
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#include "qgslayertreemodel.h"
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#include "qgslayertreeviewdefaultactions.h"
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#include "qgsmaplayerstyleguiutils.h"
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#include "qgsproject.h"
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#include "qgsrasterlayer.h"
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#include "qgsvectordataprovider.h"
@@ -87,6 +88,21 @@ QMenu* QgsAppLayerTreeViewMenuProvider::createContextMenu()
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// assign layer crs to project
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menu->addAction( QgsApplication::getThemeIcon( "/mActionSetProjectCRS.png" ), tr( "Set &Project CRS from Layer" ), QgisApp::instance(), SLOT( setProjectCRSFromLayer() ) );
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// style-related actions
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if ( mView->selectedLayerNodes().count() == 1 )
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{
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QMenu* menuStyleManager = QgsMapLayerStyleGuiUtils::instance()->createStyleManagerMenu( layer );
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QgisApp* app = QgisApp::instance();
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menuStyleManager->addSeparator();
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menuStyleManager->addAction( tr( "Copy Style" ), app, SLOT( copyStyle() ) );
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if ( app->clipboard()->hasFormat( QGSCLIPBOARD_STYLE_MIME ) )
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{
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menuStyleManager->addAction( tr( "Paste Style" ), app, SLOT( pasteStyle() ) );
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}
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menu->addMenu( menuStyleManager );
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}
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menu->addSeparator();
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if ( layer && layer->type() == QgsMapLayer::VectorLayer )
@@ -157,16 +173,6 @@ QMenu* QgsAppLayerTreeViewMenuProvider::createContextMenu()
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158174
if ( mView->selectedNodes( true ).count() >= 2 )
159175
menu->addAction( actions->actionGroupSelected( menu ) );
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161-
if ( mView->selectedLayerNodes().count() == 1 )
162-
{
163-
QgisApp* app = QgisApp::instance();
164-
menu->addAction( tr( "Copy Style" ), app, SLOT( copyStyle() ) );
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if ( app->clipboard()->hasFormat( QGSCLIPBOARD_STYLE_MIME ) )
166-
{
167-
menu->addAction( tr( "Paste Style" ), app, SLOT( pasteStyle() ) );
168-
}
169-
}
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}
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}

‎src/app/qgsapplayertreeviewmenuprovider.h

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@@ -36,7 +36,6 @@ class QgsAppLayerTreeViewMenuProvider : public QObject, public QgsLayerTreeViewM
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void removeLegendLayerActionsForLayer( QgsMapLayer* layer );
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QList< LegendLayerAction > legendLayerActions( QgsMapLayer::LayerType type ) const;
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39-
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protected:
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void addCustomLayerActions( QMenu* menu, QgsMapLayer* layer );

‎src/app/qgsmaplayerstyleguiutils.cpp

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/***************************************************************************
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qgsmaplayerstyleguiutils.cpp
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--------------------------------------
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Date : January 2015
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Copyright : (C) 2015 by Martin Dobias
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Email : wonder dot sk at gmail dot com
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***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
10+
* it under the terms of the GNU General Public License as published by *
11+
* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "qgsmaplayerstyleguiutils.h"
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#include <QAction>
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#include <QInputDialog>
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#include <QMenu>
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#include "qgslogger.h"
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#include "qgsmapcanvas.h"
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#include "qgsmaplayer.h"
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#include "qgsmaplayerstylemanager.h"
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QMenu* QgsMapLayerStyleGuiUtils::createStyleManagerMenu( QgsMapLayer* layer )
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{
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QMenu* m = new QMenu( tr( "Styles" ) );
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QAction* actionAdd = m->addAction( tr( "Add..." ), this, SLOT( addStyle() ) );
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actionAdd->setData( QVariant::fromValue<QObject*>( layer ) );
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QgsMapLayerStyleManager* mgr = layer->styleManager();
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if ( !mgr )
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return m;
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QMenu* mRemove = m->addMenu( tr( "Remove" ) );
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m->addSeparator();
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foreach ( QString name, mgr->styles() )
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{
44+
bool active = name == mgr->currentStyle();
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if ( name.isEmpty() )
46+
name = defaultStyleName();
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QAction* actionUse = m->addAction( name, this, SLOT( useStyle() ) );
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actionUse->setCheckable( true );
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actionUse->setChecked( active );
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actionUse->setData( QVariant::fromValue<QObject*>( layer ) );
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QAction* actionRemove = mRemove->addAction( name, this, SLOT( removeStyle() ) );
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actionRemove->setData( QVariant::fromValue<QObject*>( layer ) );
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}
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return m;
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}
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QString QgsMapLayerStyleGuiUtils::defaultStyleName()
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{
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return tr( "(default)" );
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}
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void QgsMapLayerStyleGuiUtils::addStyle()
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{
67+
QAction* a = qobject_cast<QAction*>( sender() );
68+
if ( !a )
69+
return;
70+
QgsMapLayer* layer = qobject_cast<QgsMapLayer*>( a->data().value<QObject*>() );
71+
if ( !layer )
72+
return;
73+
74+
bool ok;
75+
QString text = QInputDialog::getText( 0, tr( "New style" ),
76+
tr( "Style name:" ), QLineEdit::Normal,
77+
"new style", &ok );
78+
if ( !ok || text.isEmpty() )
79+
return;
80+
81+
layer->enableStyleManager(); // make sure it exists
82+
83+
bool res = layer->styleManager()->addStyleFromLayer( text );
84+
85+
if ( res ) // make it active!
86+
layer->styleManager()->setCurrentStyle( text );
87+
else
88+
QgsDebugMsg( "Failed to add style: " + text );
89+
}
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91+
void QgsMapLayerStyleGuiUtils::useStyle()
92+
{
93+
QAction* a = qobject_cast<QAction*>( sender() );
94+
if ( !a )
95+
return;
96+
QgsMapLayer* layer = qobject_cast<QgsMapLayer*>( a->data().value<QObject*>() );
97+
if ( !layer )
98+
return;
99+
QString name = a->text();
100+
if ( name == defaultStyleName() )
101+
name.clear();
102+
103+
bool res = layer->styleManager()->setCurrentStyle( name );
104+
if ( !res )
105+
QgsDebugMsg( "Failed to set current style: " + name );
106+
107+
layer->triggerRepaint();
108+
}
109+
110+
111+
void QgsMapLayerStyleGuiUtils::removeStyle()
112+
{
113+
QAction* a = qobject_cast<QAction*>( sender() );
114+
if ( !a )
115+
return;
116+
QgsMapLayer* layer = qobject_cast<QgsMapLayer*>( a->data().value<QObject*>() );
117+
if ( !layer )
118+
return;
119+
120+
if ( layer->styleManager()->styles().count() == 1 )
121+
{
122+
// let's get rid of the style manager altogether
123+
layer->enableStyleManager( false );
124+
return;
125+
}
126+
127+
QString name = a->text();
128+
if ( name == defaultStyleName() )
129+
name.clear();
130+
131+
bool needsRefresh = ( layer->styleManager()->currentStyle() == name );
132+
133+
bool res = layer->styleManager()->removeStyle( name );
134+
if ( !res )
135+
QgsDebugMsg( "Failed to remove style: " + name );
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137+
if ( needsRefresh )
138+
layer->triggerRepaint();
139+
}

‎src/app/qgsmaplayerstyleguiutils.h

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/***************************************************************************
2+
qgsmaplayerstyleguiutils.h
3+
--------------------------------------
4+
Date : January 2015
5+
Copyright : (C) 2015 by Martin Dobias
6+
Email : wonder dot sk at gmail dot com
7+
***************************************************************************
8+
* *
9+
* This program is free software; you can redistribute it and/or modify *
10+
* it under the terms of the GNU General Public License as published by *
11+
* the Free Software Foundation; either version 2 of the License, or *
12+
* (at your option) any later version. *
13+
* *
14+
***************************************************************************/
15+
16+
#ifndef QGSMAPLAYERSTYLEGUIUTILS_H
17+
#define QGSMAPLAYERSTYLEGUIUTILS_H
18+
19+
#include <QObject>
20+
21+
#include "qgssingleton.h"
22+
23+
class QgsMapLayer;
24+
class QMenu;
25+
26+
/** Various GUI utility functions for dealing with map layer's style manager */
27+
class QgsMapLayerStyleGuiUtils : public QObject, public QgsSingleton<QgsMapLayerStyleGuiUtils>
28+
{
29+
Q_OBJECT
30+
public:
31+
32+
//! Return menu instance with actions for the give map layer
33+
QMenu* createStyleManagerMenu( QgsMapLayer* layer );
34+
35+
private:
36+
QString defaultStyleName();
37+
38+
private slots:
39+
void addStyle();
40+
void useStyle();
41+
void removeStyle();
42+
43+
};
44+
45+
#endif // QGSMAPLAYERSTYLEGUIUTILS_H

‎src/core/CMakeLists.txt

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@@ -106,6 +106,7 @@ SET(QGIS_CORE_SRCS
106106
qgsmaplayer.cpp
107107
qgsmaplayerlegend.cpp
108108
qgsmaplayerregistry.cpp
109+
qgsmaplayerstylemanager.cpp
109110
qgsmaprenderer.cpp
110111
qgsmaprenderercache.cpp
111112
qgsmaprenderercustompainterjob.cpp
@@ -495,6 +496,7 @@ SET(QGIS_CORE_HDRS
495496
qgsmaplayer.h
496497
qgsmaplayerlegend.h
497498
qgsmaplayerregistry.h
499+
qgsmaplayerstylemanager.h
498500
qgsmaprenderer.h
499501
qgsmaprenderercache.h
500502
qgsmaprenderercustompainterjob.h

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