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qgsfilterlineedit.cpp
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qgsfilterlineedit.cpp
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/***************************************************************************
qgsfilterlineedit.cpp
------------------------
begin : October 27, 2012
copyright : (C) 2012 by Alexander Bruy
email : alexander dot bruy 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. *
* *
***************************************************************************/
#include "qgsfilterlineedit.h"
#include "qgsapplication.h"
#include "qgsanimatedicon.h"
#include <QAction>
#include <QToolButton>
#include <QStyle>
#include <QFocusEvent>
#include <QPainter>
QgsFilterLineEdit::QgsFilterLineEdit( QWidget *parent, const QString &nullValue )
: QLineEdit( parent )
, mNullValue( nullValue )
{
// icon size is about 2/3 height of text, but minimum size of 16
int iconSize = std::floor( std::max( Qgis::UI_SCALE_FACTOR * fontMetrics().height() * 0.75, 16.0 ) );
mClearIcon.addPixmap( QgsApplication::getThemeIcon( "/mIconClearText.svg" ).pixmap( QSize( iconSize, iconSize ) ), QIcon::Normal, QIcon::On );
mClearIcon.addPixmap( QgsApplication::getThemeIcon( "/mIconClearTextHover.svg" ).pixmap( QSize( iconSize, iconSize ) ), QIcon::Selected, QIcon::On );
connect( this, &QLineEdit::textChanged, this,
&QgsFilterLineEdit::onTextChanged );
}
void QgsFilterLineEdit::setShowClearButton( bool visible )
{
mClearButtonVisible = visible;
updateClearIcon();
}
void QgsFilterLineEdit::setShowSearchIcon( bool visible )
{
if ( visible && !mSearchAction )
{
QIcon searchIcon = QgsApplication::getThemeIcon( "/search.svg" );
mSearchAction = new QAction( searchIcon, QString(), this );
mSearchAction->setCheckable( false );
addAction( mSearchAction, QLineEdit::LeadingPosition );
}
else if ( !visible && mSearchAction )
{
mSearchAction->deleteLater();
mSearchAction = nullptr;
}
}
void QgsFilterLineEdit::updateClearIcon()
{
bool showClear = shouldShowClear();
if ( showClear && !mClearAction )
{
mClearAction = new QAction( mClearIcon, QString(), this );
mClearAction->setCheckable( false );
addAction( mClearAction, QLineEdit::TrailingPosition );
connect( mClearAction, &QAction::triggered, this, &QgsFilterLineEdit::clearValue );
}
else if ( !showClear && mClearAction )
{
// pretty freakin weird... seems the deleteLater call on the mClearAction
// isn't sufficient to actually remove the action from the line edit, and
// a kind of "ghost" action gets left behind... resulting in duplicate
// clear actions appearing if later we re-create the action.
// in summary: don't remove this "removeAction" call!
removeAction( mClearAction );
mClearAction->deleteLater();
mClearAction = nullptr;
}
}
void QgsFilterLineEdit::focusInEvent( QFocusEvent *e )
{
QLineEdit::focusInEvent( e );
if ( e->reason() == Qt::MouseFocusReason && ( isNull() || mSelectOnFocus ) )
{
mFocusInEvent = true;
mWaitingForMouseRelease = true;
}
}
void QgsFilterLineEdit::mouseReleaseEvent( QMouseEvent *e )
{
QLineEdit::mouseReleaseEvent( e );
if ( mWaitingForMouseRelease )
{
mWaitingForMouseRelease = false;
selectAll();
}
}
void QgsFilterLineEdit::clearValue()
{
switch ( mClearMode )
{
case ClearToNull:
setText( mNullValue );
selectAll();
break;
case ClearToDefault:
setText( mDefaultValue );
break;
}
setModified( true );
emit cleared();
}
void QgsFilterLineEdit::onTextChanged( const QString &text )
{
updateClearIcon();
if ( isNull() )
{
setStyleSheet( QStringLiteral( "QLineEdit { font: italic; color: gray; } %1" ).arg( mStyleSheet ) );
emit valueChanged( QString() );
}
else
{
setStyleSheet( mStyleSheet );
emit valueChanged( text );
}
}
void QgsFilterLineEdit::updateBusySpinner()
{
if ( !mBusySpinnerAction )
{
mBusySpinnerAction = addAction( mBusySpinnerAnimatedIcon->icon(), QLineEdit::TrailingPosition );
}
mBusySpinnerAction->setIcon( mBusySpinnerAnimatedIcon->icon() );
}
bool QgsFilterLineEdit::selectOnFocus() const
{
return mSelectOnFocus;
}
void QgsFilterLineEdit::setSelectOnFocus( bool selectOnFocus )
{
if ( mSelectOnFocus == selectOnFocus )
return;
mSelectOnFocus = selectOnFocus;
emit selectOnFocusChanged();
}
bool QgsFilterLineEdit::showSpinner() const
{
return mShowSpinner;
}
void QgsFilterLineEdit::setShowSpinner( bool showSpinner )
{
if ( showSpinner == mShowSpinner )
return;
if ( showSpinner )
{
if ( !mBusySpinnerAnimatedIcon )
mBusySpinnerAnimatedIcon = new QgsAnimatedIcon( QgsApplication::iconPath( QStringLiteral( "/mIconLoading.gif" ) ), this );
mBusySpinnerAnimatedIcon->connectFrameChanged( this, &QgsFilterLineEdit::updateBusySpinner );
}
else
{
mBusySpinnerAnimatedIcon->disconnectFrameChanged( this, &QgsFilterLineEdit::updateBusySpinner );
removeAction( mBusySpinnerAction );
mBusySpinnerAction = nullptr;
}
mShowSpinner = showSpinner;
emit showSpinnerChanged();
}
bool QgsFilterLineEdit::shouldShowClear() const
{
if ( !isEnabled() || isReadOnly() || !mClearButtonVisible )
return false;
switch ( mClearMode )
{
case ClearToNull:
return !isNull();
case ClearToDefault:
return value() != mDefaultValue;
}
return false; //avoid warnings
}
bool QgsFilterLineEdit::event( QEvent *event )
{
if ( event->type() == QEvent::ReadOnlyChange || event->type() == QEvent::EnabledChange )
updateClearIcon();
return QLineEdit::event( event );;
}