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create scale widget (scale combo box + button to set scale from map c…
…anvas)
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/** A combobox which lets the user select map scale from predefined list | ||
* and highlights nearest to current scale value | ||
*/ | ||
class QgsScaleWidget : QWidget | ||
{ | ||
%TypeHeaderCode | ||
#include <qgsscalewidget.h> | ||
%End | ||
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public: | ||
QgsScaleWidget( QWidget* parent = 0 ); | ||
~QgsScaleWidget(); | ||
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//! shows a button to set the scale to the current scale of the map canvas next to the combobox | ||
//! @note the map canvas must be defined to show the button | ||
void setShowCurrentScaleButton( bool showCurrentScaleButton ); | ||
bool showCurrentScaleButton(); | ||
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//! set the map canvas associated to the current button | ||
void setMapCanvas( QgsMapCanvas* canvas ); | ||
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//! Function to read the selected scale as text | ||
QString scaleString(); | ||
//! Function to set the selected scale from text | ||
bool setScaleString( QString scaleTxt ); | ||
//! Function to read the selected scale as double | ||
double scale(); | ||
//! Function to set the selected scale from double | ||
void setScale( double scale ); | ||
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//! Helper function to convert a double to scale string | ||
// Performs rounding, so an exact representation is not to | ||
// be expected. | ||
static QString toString( double scale ); | ||
//! Helper function to convert a scale string to double | ||
static double toDouble( QString scaleString, bool *ok = NULL ); | ||
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signals: | ||
//! Signal is emitted when *user* has finished editing/selecting a new scale. | ||
void scaleChanged(); | ||
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public slots: | ||
void updateScales( const QStringList &scales = QStringList() ); | ||
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}; | ||
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/*************************************************************************** | ||
qgsscalewidget.cpp | ||
-------------------------------------- | ||
Date : 08.01.2015 | ||
Copyright : (C) 2014 Denis Rouzaud | ||
Email : denis.rouzaud@gmail.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. * | ||
* * | ||
***************************************************************************/ | ||
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#include <QHBoxLayout> | ||
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#include "qgsapplication.h" | ||
#include "qgsscalewidget.h" | ||
#include "qgsmapcanvas.h" | ||
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QgsScaleWidget::QgsScaleWidget( QWidget *parent ) | ||
: QWidget( parent ) | ||
, mShowCurrentScaleButton( false ) | ||
, mCanvas( NULL ) | ||
{ | ||
QHBoxLayout* layout = new QHBoxLayout( this ); | ||
layout->setContentsMargins( 0, 0, 0, 0 ); | ||
layout->setSpacing( 2 ); | ||
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mScaleComboBox = new QgsScaleComboBox( this ); | ||
layout->addWidget( mScaleComboBox ); | ||
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mCurrentScaleButton = new QToolButton( this ); | ||
mCurrentScaleButton->setIcon( QgsApplication::getThemeIcon( "/mActionMapIdentification.svg" ) ); | ||
layout->addWidget( mCurrentScaleButton ); | ||
mCurrentScaleButton->hide(); | ||
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connect( mScaleComboBox, SIGNAL( scaleChanged() ), this, SIGNAL( scaleChanged() ) ); | ||
connect( mCurrentScaleButton, SIGNAL( clicked() ), this, SLOT( setScaleFromCanvas() ) ); | ||
} | ||
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QgsScaleWidget::~QgsScaleWidget() | ||
{ | ||
} | ||
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void QgsScaleWidget::setShowCurrentScaleButton( bool showCurrentScaleButton ) | ||
{ | ||
mShowCurrentScaleButton = showCurrentScaleButton; | ||
mCurrentScaleButton->setVisible( mShowCurrentScaleButton && mCanvas ); | ||
} | ||
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void QgsScaleWidget::setMapCanvas( QgsMapCanvas* canvas ) | ||
{ | ||
mCanvas = canvas; | ||
mCurrentScaleButton->setVisible( mShowCurrentScaleButton && mCanvas ); | ||
} | ||
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void QgsScaleWidget::setScaleFromCanvas() | ||
{ | ||
if ( !mCanvas ) | ||
return; | ||
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setScale( mCanvas->scale() ); | ||
} | ||
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/*************************************************************************** | ||
qgsscalewidget.h | ||
-------------------------------------- | ||
Date : 08.01.2015 | ||
Copyright : (C) 2014 Denis Rouzaud | ||
Email : denis.rouzaud@gmail.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. * | ||
* * | ||
***************************************************************************/ | ||
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#ifndef QGSSCALEWIDGET_H | ||
#define QGSSCALEWIDGET_H | ||
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#include <QWidget> | ||
#include <QToolButton> | ||
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#include "qgsscalecombobox.h" | ||
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class QgsMapCanvas; | ||
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/** \ingroup gui | ||
* A combobox which lets the user select map scale from predefined list | ||
* and highlights nearest to current scale value | ||
**/ | ||
class GUI_EXPORT QgsScaleWidget : public QWidget | ||
{ | ||
Q_OBJECT | ||
Q_PROPERTY( bool showCurrentScaleButton READ showCurrentScaleButton WRITE setShowCurrentScaleButton ) | ||
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public: | ||
explicit QgsScaleWidget(QWidget *parent = 0); | ||
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virtual ~QgsScaleWidget(); | ||
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//! shows a button to set the scale to the current scale of the map canvas next to the combobox | ||
//! @note the map canvas must be defined to show the button | ||
void setShowCurrentScaleButton( bool showCurrentScaleButton ); | ||
bool showCurrentScaleButton(){ return mShowCurrentScaleButton;} | ||
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//! set the map canvas associated to the current button | ||
void setMapCanvas( QgsMapCanvas* canvas ); | ||
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//! Function to read the selected scale as text | ||
QString scaleString(){return mScaleComboBox->scaleString();} | ||
//! Function to set the selected scale from text | ||
bool setScaleString( QString scaleTxt ){return mScaleComboBox->setScaleString(scaleTxt);} | ||
//! Function to read the selected scale as double | ||
double scale(){return mScaleComboBox->scale();} | ||
//! Function to set the selected scale from double | ||
void setScale( double scale ){return mScaleComboBox->setScale(scale);} | ||
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//! Helper function to convert a double to scale string | ||
// Performs rounding, so an exact representation is not to | ||
// be expected. | ||
static QString toString( double scale ){return QgsScaleComboBox::toString(scale);} | ||
//! Helper function to convert a scale string to double | ||
static double toDouble( QString scaleString, bool *ok = NULL ){return QgsScaleComboBox::toDouble(scaleString, ok);} | ||
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public slots: | ||
void updateScales( const QStringList &scales = QStringList() ){return mScaleComboBox->updateScales(scales);} | ||
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//! assign the current scale from the map canvas | ||
void setScaleFromCanvas(); | ||
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signals: | ||
//! Signal is emitted when *user* has finished editing/selecting a new scale. | ||
void scaleChanged(); | ||
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private: | ||
QgsScaleComboBox* mScaleComboBox; | ||
QToolButton* mCurrentScaleButton; | ||
QgsMapCanvas* mCanvas; | ||
bool mShowCurrentScaleButton; | ||
}; | ||
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#endif // QGSSCALEWIDGET_H |