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Merge pull request #5714 from opengisch/grid_decoration
Support grid decoration
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/*************************************************************************** | ||
gridmodel.cpp - GridModel | ||
--------------------- | ||
begin : 4.10.2024 | ||
copyright : (C) 2024 by Mathieu Pellerin | ||
email : [email protected] | ||
*************************************************************************** | ||
* * | ||
* 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. * | ||
* * | ||
***************************************************************************/ | ||
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#include "gridmodel.h" | ||
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GridModel::GridModel( QObject *parent ) | ||
: QObject( parent ) | ||
{ | ||
} | ||
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void GridModel::setEnabled( bool enabled ) | ||
{ | ||
if ( mEnabled == enabled ) | ||
return; | ||
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mEnabled = enabled; | ||
emit enabledChanged(); | ||
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if ( mEnabled ) | ||
{ | ||
update(); | ||
} | ||
else | ||
{ | ||
if ( !mLines.isEmpty() || !mMarkers.isEmpty() || !mAnnotations.isEmpty() ) | ||
{ | ||
mLines.clear(); | ||
mMarkers.clear(); | ||
mAnnotations.clear(); | ||
emit gridChanged(); | ||
} | ||
} | ||
} | ||
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void GridModel::setMapSettings( QgsQuickMapSettings *mapSettings ) | ||
{ | ||
if ( mMapSettings == mapSettings ) | ||
{ | ||
return; | ||
} | ||
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if ( mMapSettings ) | ||
{ | ||
disconnect( mMapSettings, &QgsQuickMapSettings::visibleExtentChanged, this, &GridModel::update ); | ||
} | ||
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mMapSettings = mapSettings; | ||
emit mapSettingsChanged(); | ||
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if ( mMapSettings ) | ||
{ | ||
connect( mMapSettings, &QgsQuickMapSettings::visibleExtentChanged, this, &GridModel::update ); | ||
} | ||
} | ||
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void GridModel::setXInterval( double interval ) | ||
{ | ||
if ( mXInterval == interval ) | ||
return; | ||
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mXInterval = interval; | ||
emit xIntervalChanged(); | ||
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update(); | ||
} | ||
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void GridModel::setYInterval( double interval ) | ||
{ | ||
if ( mYInterval == interval ) | ||
return; | ||
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mYInterval = interval; | ||
emit yIntervalChanged(); | ||
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update(); | ||
} | ||
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void GridModel::setXOffset( double offset ) | ||
{ | ||
if ( mXOffset == offset ) | ||
return; | ||
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mXOffset = offset; | ||
emit xOffsetChanged(); | ||
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update(); | ||
} | ||
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void GridModel::setYOffset( double offset ) | ||
{ | ||
if ( mYOffset == offset ) | ||
return; | ||
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mYOffset = offset; | ||
emit yOffsetChanged(); | ||
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update(); | ||
} | ||
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void GridModel::setPrepareLines( bool prepare ) | ||
{ | ||
if ( mPrepareLines == prepare ) | ||
return; | ||
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mPrepareLines = prepare; | ||
emit prepareLinesChanged(); | ||
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if ( mPrepareLines ) | ||
{ | ||
update(); | ||
} | ||
else | ||
{ | ||
if ( !mLines.isEmpty() ) | ||
{ | ||
mLines.clear(); | ||
emit gridChanged(); | ||
} | ||
} | ||
} | ||
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void GridModel::setPrepareMarkers( bool prepare ) | ||
{ | ||
if ( mPrepareMarkers == prepare ) | ||
return; | ||
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mPrepareMarkers = prepare; | ||
emit prepareMarkersChanged(); | ||
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if ( mPrepareMarkers ) | ||
{ | ||
update(); | ||
} | ||
else | ||
{ | ||
if ( !mMarkers.isEmpty() ) | ||
{ | ||
mMarkers.clear(); | ||
emit gridChanged(); | ||
} | ||
} | ||
} | ||
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void GridModel::setPrepareAnnotations( bool prepare ) | ||
{ | ||
if ( mPrepareAnnotations == prepare ) | ||
return; | ||
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mPrepareAnnotations = prepare; | ||
emit prepareAnnotationsChanged(); | ||
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if ( mPrepareAnnotations ) | ||
{ | ||
update(); | ||
} | ||
else | ||
{ | ||
if ( !mAnnotations.isEmpty() ) | ||
{ | ||
mAnnotations.clear(); | ||
emit gridChanged(); | ||
} | ||
} | ||
} | ||
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void GridModel::update() | ||
{ | ||
if ( !mEnabled || !mMapSettings ) | ||
{ | ||
return; | ||
} | ||
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bool hadGrid = !mLines.isEmpty() || !mMarkers.isEmpty() || !mAnnotations.isEmpty(); | ||
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mLines.clear(); | ||
mMarkers.clear(); | ||
mAnnotations.clear(); | ||
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const QgsRectangle visibleExtent = mMapSettings->visibleExtent(); | ||
double smallestScreenInterval = std::min( mXInterval / mMapSettings->mapUnitsPerPoint(), mYInterval / mMapSettings->mapUnitsPerPoint() ); | ||
if ( smallestScreenInterval < ( mPrepareMarkers ? 20 : 10 ) ) | ||
{ | ||
if ( hadGrid ) | ||
{ | ||
emit gridChanged(); | ||
} | ||
return; | ||
} | ||
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QList<QPointF> line; | ||
QPointF intersectionPoint; | ||
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if ( mPrepareMarkers ) | ||
{ | ||
double xPos = visibleExtent.xMinimum() - std::fmod( visibleExtent.xMinimum(), mXInterval ) + mXOffset; | ||
while ( xPos <= visibleExtent.xMaximum() ) | ||
{ | ||
double yPos = visibleExtent.yMinimum() - std::fmod( visibleExtent.yMinimum(), mYInterval ) + mYOffset; | ||
while ( yPos <= visibleExtent.yMaximum() ) | ||
{ | ||
mMarkers << mMapSettings->coordinateToScreen( QgsPoint( xPos, yPos ) ); | ||
yPos += mYInterval; | ||
} | ||
xPos += mXInterval; | ||
} | ||
} | ||
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const QSizeF sceneSize = mMapSettings->outputSize() / mMapSettings->devicePixelRatio(); | ||
if ( mPrepareLines || mPrepareAnnotations ) | ||
{ | ||
double xPos = visibleExtent.xMinimum() - std::fmod( visibleExtent.xMinimum(), mXInterval ) + mXOffset; | ||
const QLineF topBorder( QPointF( 0, 0 ), QPointF( sceneSize.width(), 0 ) ); | ||
const QLineF bottomBorder( QPointF( 0, sceneSize.height() ), QPointF( sceneSize.width(), sceneSize.height() ) ); | ||
while ( xPos <= visibleExtent.xMaximum() ) | ||
{ | ||
const QLineF currentLine( mMapSettings->coordinateToScreen( QgsPoint( xPos, visibleExtent.yMinimum() ) ), mMapSettings->coordinateToScreen( QgsPoint( xPos, visibleExtent.yMaximum() ) ) ); | ||
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if ( mPrepareAnnotations ) | ||
{ | ||
if ( currentLine.intersects( topBorder, &intersectionPoint ) ) | ||
{ | ||
mAnnotations << GridAnnotation( GridAnnotation::Top, intersectionPoint, xPos ); | ||
} | ||
if ( currentLine.intersects( bottomBorder, &intersectionPoint ) ) | ||
{ | ||
mAnnotations << GridAnnotation( GridAnnotation::Bottom, intersectionPoint, xPos ); | ||
} | ||
} | ||
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if ( mPrepareLines ) | ||
{ | ||
line << currentLine.p1() << currentLine.p2(); | ||
mLines << line; | ||
line.clear(); | ||
} | ||
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xPos += mXInterval; | ||
} | ||
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double yPos = visibleExtent.yMinimum() - std::fmod( visibleExtent.yMinimum(), mYInterval ) + mYOffset; | ||
const QLineF leftBorder( QPointF( 0, 0 ), QPointF( 0, sceneSize.height() ) ); | ||
const QLineF rightBorder( QPointF( sceneSize.width(), 0 ), QPointF( sceneSize.width(), sceneSize.height() ) ); | ||
while ( yPos <= visibleExtent.yMaximum() ) | ||
{ | ||
const QLineF currentLine( mMapSettings->coordinateToScreen( QgsPoint( visibleExtent.xMinimum(), yPos ) ), mMapSettings->coordinateToScreen( QgsPoint( visibleExtent.xMaximum(), yPos ) ) ); | ||
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if ( mPrepareAnnotations ) | ||
{ | ||
if ( currentLine.intersects( leftBorder, &intersectionPoint ) ) | ||
{ | ||
mAnnotations << GridAnnotation( GridAnnotation::Left, intersectionPoint, yPos ); | ||
} | ||
if ( currentLine.intersects( rightBorder, &intersectionPoint ) ) | ||
{ | ||
mAnnotations << GridAnnotation( GridAnnotation::Right, intersectionPoint, yPos ); | ||
} | ||
} | ||
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if ( mPrepareLines ) | ||
{ | ||
line << currentLine.p1() << currentLine.p2(); | ||
mLines << line; | ||
line.clear(); | ||
} | ||
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yPos += mYInterval; | ||
} | ||
} | ||
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emit gridChanged(); | ||
} |
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