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[feature ] Add PositionKit, PositionMarker and other related classes …

…to QgsQuick.

For background information see the associated QEP (qgis/QGIS-Enhancement-Proposals#109
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viktor.sklencar@lutraconsulting.co.uk authored and PeterPetrik committed May 16, 2018
1 parent 7acfe03 commit 5f07851a2d5667d36cd90fb54bc02239774776dc
@@ -13,7 +13,9 @@ QGIS Quick consists of a Qt plugin that provides the QML components and of a sha

\subsection qgsquick_overview_widgets QML Classes
\subsubsection qgsquick_overview_widgets_mapcanvas MapCanvas
Similarly to QgsMapCanvas, this component can be used for displaying GIS data on a canvas. See also QgsQuickMapCanvasMap.
\subsubsection qgsquick_overview_widgets_positionmarker PositionMarker
The element refers to current position according gps location device connected to it. It holds information about longitude, latitude, altitude,
direction of the movement and accuracy of the signal. See also QgsQuickPostionKit.
\subsubsection qgsquick_overview_widgets_scalebar ScaleBar
A QML component that shows the scale ratio between its length and distance on the MapCanvas. There are predefined rounded values
for several zooming levels with 'm' or 'km' postfixes. After any zoom in/out event on canvas recalculates its properties and updates
@@ -2,13 +2,16 @@
# sources
SET(QGIS_QUICK_GUI_MOC_HDRS
qgsquickfeaturelayerpair.h
qgsquickcoordinatetransformer.h
qgsquickfeaturehighlight.h
qgsquickidentifykit.h
qgsquickmapcanvasmap.h
qgsquickmapsettings.h
qgsquickmaptransform.h
qgsquickmessagelogmodel.h
qgsquickpositionkit.h
qgsquickscalebarkit.h
qgsquicksimulatedpositionsource.h
qgsquickutils.h
)

@@ -18,14 +21,17 @@ SET(QGIS_QUICK_GUI_HDRS

SET(QGIS_QUICK_GUI_SRC
qgsquickfeaturelayerpair.cpp
qgsquickcoordinatetransformer.cpp
qgsquickfeaturehighlight.cpp
qgsquickhighlightsgnode.cpp
qgsquickidentifykit.cpp
qgsquickmapcanvasmap.cpp
qgsquickmapsettings.cpp
qgsquickmaptransform.cpp
qgsquickmessagelogmodel.cpp
qgsquickpositionkit.cpp
qgsquickscalebarkit.cpp
qgsquicksimulatedpositionsource.cpp
qgsquickutils.cpp
)

@@ -69,6 +75,10 @@ INCLUDE_DIRECTORIES(SYSTEM

ADD_DEFINITIONS(-DCORE_EXPORT=)


SET(QGIS_QUICK_GUI_IMAGE_RCCS ./images/images.qrc)
QT5_ADD_RESOURCES(QGIS_QUICK_GUI_IMAGE_RCC_SRCS ${QGIS_QUICK_GUI_IMAGE_RCCS})

############################################################
# qgis_quick shared library
QT5_WRAP_CPP(QGIS_QUICK_GUI_MOC_SRCS ${QGIS_QUICK_GUI_MOC_HDRS})
@@ -0,0 +1,4 @@
<svg fill="#000000" height="48" viewBox="0 0 24 24" width="48" xmlns="http://www.w3.org/2000/svg">
<path d="M0 0h24v24H0z" fill="none"/>
<path d="M12 2L4.5 20.29l.71.71L12 18l6.79 3 .71-.71z"/>
</svg>
@@ -0,0 +1,5 @@
<RCC>
<qresource prefix="/">
<file>ic_navigation_black.svg</file>
</qresource>
</RCC>
@@ -12,6 +12,7 @@ SET(QGIS_QUICK_PLUGIN_SRC
SET(QGIS_QUICK_PLUGIN_RESOURCES
qgsquickmapcanvas.qml
qgsquickmessagelog.qml
qgsquickpositionmarker.qml
qgsquickscalebar.qml
qmldir
)
@@ -30,13 +30,15 @@
#include "qgsvectorlayer.h"

#include "qgsquickfeaturehighlight.h"
#include "qgsquickcoordinatetransformer.h"
#include "qgsquickidentifykit.h"
#include "qgsquickfeaturelayerpair.h"
#include "qgsquickmapcanvasmap.h"
#include "qgsquickmapsettings.h"
#include "qgsquickmaptransform.h"
#include "qgsquickmessagelogmodel.h"
#include "qgsquickplugin.h"
#include "qgsquickpositionkit.h"
#include "qgsquickscalebarkit.h"
#include "qgsquickutils.h"

@@ -61,11 +63,13 @@ void QgsQuickPlugin::registerTypes( const char *uri )

qmlRegisterType< QgsProject >( uri, 0, 1, "Project" );
qmlRegisterType< QgsQuickFeatureHighlight >( uri, 0, 1, "FeatureHighlight" );
qmlRegisterType< QgsQuickCoordinateTransformer >( uri, 0, 1, "CoordinateTransformer" );
qmlRegisterType< QgsQuickIdentifyKit >( uri, 0, 1, "IdentifyKit" );
qmlRegisterType< QgsQuickMapCanvasMap >( uri, 0, 1, "MapCanvasMap" );
qmlRegisterType< QgsQuickMapSettings >( uri, 0, 1, "MapSettings" );
qmlRegisterType< QgsQuickMapTransform >( uri, 0, 1, "MapTransform" );
qmlRegisterType< QgsQuickMessageLogModel >( uri, 0, 1, "MessageLogModel" );
qmlRegisterType< QgsQuickPositionKit >( uri, 0, 1, "PositionKit" );
qmlRegisterType< QgsQuickScaleBarKit >( uri, 0, 1, "ScaleBarKit" );
qmlRegisterType< QgsVectorLayer >( uri, 0, 1, "VectorLayer" );

@@ -0,0 +1,115 @@
/***************************************************************************
qgsquickpositionmarker.qml
--------------------------------------
Date : Dec 2017
Copyright : (C) 2017 by Peter Petrik
Email : zilolv at gmail dot com
***************************************************************************
* *
* 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. *
* *
***************************************************************************/

import QtQuick 2.3
import QtQuick.Controls 2.2
import QtQml 2.2
import QtGraphicalEffects 1.0
import QgsQuick 0.1 as QgsQuick

/**
* \brief Graphical representation of physical location on the map.
*
* Source position and accuracy taken from PositionKit is drawn as a marker on the map.
* Marker is grayed out when position is not available. When PositionKit support reading of the accuracy,
* the circle is drawn around the marker. PositionKit must be connected, for example GPS position source from QgsQuickPositionKit.
*/
Item {
id: positionMarker
property int size: 48 * QgsQuick.Utils.dp

/**
* Utils for handling position.
*/
property QgsQuick.PositionKit positionKit

/**
* Color of the marker when position is known.
*/
property color baseColor: "darkblue"
/**
* Color of the marker when position is unknown (e.g. GPS signal lost).
*/
property color unavailableColor: "gray"

/**
* Whether circle representing accuracy of the position should be rendered.
*/
property var withAccuracy: true

/**
* Icon for position marker.
*/
property var markerIcon: QgsQuick.Utils.getThemeIcon("ic_navigation_black")

/**
* Source position accuracy circle-shaped indicator around positionMarker.
*/
Rectangle {
id: accuracyIndicator
visible: withAccuracy &&
positionKit.hasPosition &&
(positionKit.accuracy > 0) &&
(accuracyIndicator.width > positionMarker.size / 2.0)
x: positionKit.screenPosition.x - width/2
y: positionKit.screenPosition.y - height/2
width:positionKit.screenAccuracy
height: accuracyIndicator.width
color: baseColor
border.color: "black"
border.width: 3 * QgsQuick.Utils.dp
radius: width*0.5
opacity: 0.1
}

/**
* Position marker.
*/
Rectangle {
id: navigationMarker
property int borderWidth: 2 * QgsQuick.Utils.dp
width: positionMarker.size + 20 * QgsQuick.Utils.dp
height: width
color: "white"
border.color: baseColor
border.width: borderWidth
radius: width*0.5
antialiasing: true
x: positionKit.screenPosition.x - width/2
y: positionKit.screenPosition.y - height/2

Image {
id: navigation
source: positionMarker.markerIcon
fillMode: Image.PreserveAspectFit
rotation: positionKit.direction
anchors.centerIn: parent
width: positionMarker.size
height: width
}

/**
* Makes positionMarker (navigation) grey if position is unknown.
*/
ColorOverlay {
anchors.fill: navigation
source: navigation
color: positionKit.hasPosition ? baseColor : unavailableColor
rotation: positionKit.direction
visible: !(positionKit.hasPosition)
}
}
}

@@ -14,6 +14,7 @@ module QgsQuick
plugin qgis_quick_plugin

MapCanvas 0.1 qgsquickmapcanvas.qml
PositionMarker 0.1 qgsquickpositionmarker.qml
ScaleBar 0.1 qgsquickscalebar.qml
MessageLog 0.1 qgsquickmessagelog.qml

@@ -0,0 +1,102 @@
/***************************************************************************
qgsquickcoordinatetransformer.cpp
--------------------------------------
Date : 1.6.2017
Copyright : (C) 2017 by Matthias Kuhn
Email : matthias (at) opengis.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 <QtDebug>

#include "qgsquickcoordinatetransformer.h"

QgsQuickCoordinateTransformer::QgsQuickCoordinateTransformer( QObject *parent )
: QObject( parent )
{
mCoordinateTransform.setSourceCrs( QgsCoordinateReferenceSystem::fromEpsgId( 4326 ) );
mCoordinateTransform.setContext( QgsCoordinateTransformContext() );
}

QgsPoint QgsQuickCoordinateTransformer::projectedPosition() const
{
return mProjectedPosition;
}

QgsPoint QgsQuickCoordinateTransformer::sourcePosition() const
{
return mSourcePosition;
}

void QgsQuickCoordinateTransformer::setSourcePosition( QgsPoint sourcePosition )
{
if ( mSourcePosition == sourcePosition )
return;

mSourcePosition = sourcePosition;

emit sourcePositionChanged();
updatePosition();
}

QgsCoordinateReferenceSystem QgsQuickCoordinateTransformer::destinationCrs() const
{
return mCoordinateTransform.destinationCrs();
}

void QgsQuickCoordinateTransformer::setDestinationCrs( const QgsCoordinateReferenceSystem &destinationCrs )
{
if ( destinationCrs == mCoordinateTransform.destinationCrs() )
return;

mCoordinateTransform.setDestinationCrs( destinationCrs );
emit destinationCrsChanged();
updatePosition();
}

QgsCoordinateReferenceSystem QgsQuickCoordinateTransformer::sourceCrs() const
{
return mCoordinateTransform.sourceCrs();
}

void QgsQuickCoordinateTransformer::setSourceCrs( const QgsCoordinateReferenceSystem &sourceCrs )
{
if ( sourceCrs == mCoordinateTransform.sourceCrs() )
return;

mCoordinateTransform.setSourceCrs( sourceCrs );

emit sourceCrsChanged();
updatePosition();
}

void QgsQuickCoordinateTransformer::updatePosition()
{
double x = mSourcePosition.x();
double y = mSourcePosition.y();
double z = mSourcePosition.z();

// If Z is NaN, coordinate transformation (proj4) will
// also set X and Y to NaN. But we also want to get projected
// coords if we do not have any Z coordinate.
if ( qIsNaN( z ) )
{
z = 0;
}

if ( mMapSettings )
mCoordinateTransform.setContext( mMapSettings->transformContext() );

mCoordinateTransform.transformInPlace( x, y, z );

mProjectedPosition = QgsPoint( x, y );
mProjectedPosition.addZValue( mSourcePosition.z() );

emit projectedPositionChanged();
}

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