27 for (
int i = 0; i < other.
count(); ++i )
50 for (
int i = 0; i < rhs.
count(); ++i )
67 QPainter *destPainter = context.
painter();
72 QPicture *sourcePic =
new QPicture( *
source() );
73 QPicture *currentPic = sourcePic;
74 QList< QPicture * > results;
75 for (
int i = mEffectList.count() - 1; i >= 0; --i )
83 QPicture *pic =
nullptr;
84 if ( effect->
type() == QLatin1String(
"drawSource" ) )
94 QPicture *resultPic =
new QPicture();
95 QPainter p( resultPic );
100 effect->
render( *pic, context );
104 results << resultPic;
107 currentPic = resultPic;
115 for (
int i = 0; i < mEffectList.count(); ++i )
117 if ( !mEffectList[i]->
enabled() )
122 QPicture *pic = results.takeLast();
127 context.
painter()->drawPicture( 0, 0, *pic );
143 if ( element.isNull() )
148 QDomElement effectElement = doc.createElement( QStringLiteral(
"effect" ) );
149 effectElement.setAttribute( QStringLiteral(
"type" ),
type() );
150 effectElement.setAttribute( QStringLiteral(
"enabled" ),
mEnabled );
159 element.appendChild( effectElement );
165 if ( element.isNull() )
170 mEnabled = ( element.attribute( QStringLiteral(
"enabled" ), QStringLiteral(
"0" ) ) != QLatin1String(
"0" ) );
175 QDomNodeList childNodes = element.childNodes();
176 for (
int i = 0; i < childNodes.size(); ++i )
178 QDomElement childElement = childNodes.at( i ).toElement();
197 void QgsEffectStack::clearStack()
199 qDeleteAll( mEffectList );
205 mEffectList.append( effect );
210 if ( index < 0 || index > mEffectList.count() )
215 mEffectList.insert( index, effect );
221 if ( index < 0 || index >= mEffectList.count() )
226 delete mEffectList.at( index );
227 mEffectList[index] =
effect;
233 if ( index < 0 || index >= mEffectList.count() )
236 return mEffectList.takeAt( index );
246 if ( index >= 0 && index < mEffectList.count() )
248 return mEffectList.at( index );
The result of the effect is rendered on the destination, but does not affect subsequent effects in th...
void fixQPictureDpi(QPainter *painter) const
Applies a workaround to a QPainter to avoid an issue with incorrect scaling when drawing QPictures...
Base class for visual effects which can be applied to QPicture drawings.
~QgsEffectStack() override
void draw(QgsRenderContext &context) override
Handles drawing of the effect's result on to the specified render context.
QMap< QString, QString > QgsStringMap
static QgsPaintEffectRegistry * paintEffectRegistry()
Returns the application's paint effect registry, used for managing paint effects. ...
bool saveProperties(QDomDocument &doc, QDomElement &element) const override
Saves the current state of the effect to a DOM element.
bool readProperties(const QDomElement &element) override
Restores the effect to the state described by a DOM element.
virtual QgsPaintEffect * clone() const =0
Duplicates an effect by creating a deep copy of the effect.
static QgsPaintEffect * create(const QgsStringMap &map)
Creates a new QgsEffectStack effect.
int count() const
Returns count of effects contained by the stack.
virtual QString type() const =0
Returns the effect type.
QgsPaintEffect * effect(int index) const
Returns a pointer to the effect at a specified index within the stack.
QString type() const override
Returns the effect type.
void setPainter(QPainter *p)
Sets the destination QPainter for the render operation.
A paint effect which consists of a stack of other chained paint effects.
QgsEffectStack * clone() const override
Duplicates an effect by creating a deep copy of the effect.
bool changeEffect(const int index, QgsPaintEffect *effect)
Replaces the effect at a specified position within the stack.
bool enabled() const
Returns whether the effect is enabled.
bool insertEffect(const int index, QgsPaintEffect *effect)
Inserts an effect at a specified index within the stack.
void appendEffect(QgsPaintEffect *effect)
Appends an effect to the end of the stack.
The result of the effect is not rendered, but is passed on to following effects in the stack...
bool requiresQPainterDpiFix
Contains information about the context of a rendering operation.
QPainter * painter()
Returns the destination QPainter for the render operation.
QList< QgsPaintEffect *> * effectList()
Returns a pointer to the list of effects currently contained by the stack.
QgsEffectStack & operator=(const QgsEffectStack &rhs)
virtual void render(QPicture &picture, QgsRenderContext &context)
Renders a picture using the effect.
const QPicture * source() const
Returns the source QPicture.
QgsPaintEffect * createEffect(const QString &name, const QgsStringMap &properties=QgsStringMap()) const
Creates a new paint effect given the effect name and properties map.
QgsStringMap properties() const override
Unused for QgsEffectStack, will always return an empty string map.
QgsEffectStack()=default
Constructor for empty QgsEffectStack.
QgsPaintEffect * takeEffect(const int index)
Removes an effect from the stack and returns a pointer to it.
virtual bool saveProperties(QDomDocument &doc, QDomElement &element) const
Saves the current state of the effect to a DOM element.