void FilterExpressionsPreferencesFrame::keyPressEvent(QKeyEvent *evt)
{
if (cur_line_edit_ && cur_line_edit_->hasFocus()) {
switch (evt->key()) {
case Qt::Key_Escape:
cur_line_edit_->setText(saved_col_string_);
/* Fall Through */
case Qt::Key_Enter:
case Qt::Key_Return:
switch (cur_column_) {
case label_col_:
labelEditingFinished();
break;
case expression_col_:
expressionEditingFinished();
break;
default:
break;
}
delete cur_line_edit_;
return;
default:
break;
}
}
QFrame::keyPressEvent(evt);
}
QgsFieldExpressionWidget::QgsFieldExpressionWidget( QWidget *parent )
: QWidget( parent )
, mExpressionDialogTitle( tr( "Expression dialog" ) )
, mDa( 0 )
{
QHBoxLayout* layout = new QHBoxLayout( this );
layout->setContentsMargins( 0, 0, 0, 0 );
mCombo = new QComboBox( this );
mCombo->setEditable( true );
mCombo->setSizePolicy( QSizePolicy::MinimumExpanding, QSizePolicy::Minimum );
mFieldProxyModel = new QgsFieldProxyModel( mCombo );
mFieldProxyModel->sourceFieldModel()->setAllowExpression( true );
mCombo->setModel( mFieldProxyModel );
mButton = new QToolButton( this );
mButton->setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Minimum );
mButton->setIcon( QgsApplication::getThemeIcon( "/mIconExpression.svg" ) );
layout->addWidget( mCombo );
layout->addWidget( mButton );
// give focus to the combo
// hence if the widget is used as a delegate
// it will allow pressing on the expression dialog button
setFocusProxy( mCombo );
connect( mCombo->lineEdit(), SIGNAL( textEdited( QString ) ), this, SLOT( expressionEdited( QString ) ) );
connect( mCombo->lineEdit(), SIGNAL( editingFinished() ), this, SLOT( expressionEditingFinished() ) );
connect( mCombo, SIGNAL( activated( int ) ), this, SLOT( currentFieldChanged() ) );
connect( mButton, SIGNAL( clicked() ), this, SLOT( editExpression() ) );
connect( mCombo->lineEdit(), SIGNAL( returnPressed() ), this, SIGNAL( returnPressed() ) );
}
void FilterExpressionsPreferencesFrame::on_expressionTreeWidget_itemActivated(QTreeWidgetItem *item, int column)
{
if (!item || cur_line_edit_) return;
QWidget *editor = NULL;
cur_column_ = column;
switch (column) {
case label_col_:
{
cur_line_edit_ = new QLineEdit();
cur_column_ = column;
saved_col_string_ = item->text(label_col_);
connect(cur_line_edit_, SIGNAL(editingFinished()), this, SLOT(labelEditingFinished()));
editor = cur_line_edit_;
break;
}
case expression_col_:
{
SyntaxLineEdit *syntax_edit = new SyntaxLineEdit();
saved_col_string_ = item->text(expression_col_);
connect(syntax_edit, SIGNAL(textChanged(QString)),
this, SLOT(expressionTextChanged(QString)));
connect(syntax_edit, SIGNAL(editingFinished()), this, SLOT(expressionEditingFinished()));
editor = cur_line_edit_ = syntax_edit;
break;
}
default:
return;
}
if (cur_line_edit_) {
cur_line_edit_->setText(saved_col_string_);
cur_line_edit_->selectAll();
connect(cur_line_edit_, SIGNAL(destroyed()), this, SLOT(lineEditDestroyed()));
}
if (editor) {
QFrame *edit_frame = new QFrame();
QHBoxLayout *hb = new QHBoxLayout();
QSpacerItem *spacer = new QSpacerItem(5, 10);
hb->addWidget(editor, 0);
hb->addSpacerItem(spacer);
hb->setStretch(1, 1);
hb->setContentsMargins(0, 0, 0, 0);
edit_frame->setLineWidth(0);
edit_frame->setFrameStyle(QFrame::NoFrame);
// The documentation suggests setting autoFillbackground. That looks silly
// so we clear the item text instead.
item->setText(cur_column_, "");
edit_frame->setLayout(hb);
ui->expressionTreeWidget->setItemWidget(item, cur_column_, edit_frame);
editor->setFocus();
}
}
QgsFieldExpressionWidget::QgsFieldExpressionWidget( QWidget *parent )
: QWidget( parent )
, mExpressionDialogTitle( tr( "Expression dialog" ) )
, mDa( nullptr )
, mExpressionContextCallback( nullptr )
, mExpressionContextCallbackContext( nullptr )
{
QHBoxLayout* layout = new QHBoxLayout( this );
layout->setContentsMargins( 0, 0, 0, 0 );
mCombo = new QComboBox( this );
mCombo->setEditable( true );
mCombo->setSizePolicy( QSizePolicy::MinimumExpanding, QSizePolicy::Minimum );
int width = mCombo->minimumSizeHint().width();
mCombo->setMinimumWidth( width );
mFieldProxyModel = new QgsFieldProxyModel( mCombo );
mFieldProxyModel->sourceFieldModel()->setAllowExpression( true );
mCombo->setModel( mFieldProxyModel );
mButton = new QToolButton( this );
mButton->setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Minimum );
mButton->setIcon( QgsApplication::getThemeIcon( "/mIconExpression.svg" ) );
layout->addWidget( mCombo );
layout->addWidget( mButton );
// give focus to the combo
// hence if the widget is used as a delegate
// it will allow pressing on the expression dialog button
setFocusProxy( mCombo );
connect( mCombo->lineEdit(), SIGNAL( textEdited( QString ) ), this, SLOT( expressionEdited( QString ) ) );
connect( mCombo->lineEdit(), SIGNAL( editingFinished() ), this, SLOT( expressionEditingFinished() ) );
connect( mCombo, SIGNAL( activated( int ) ), this, SLOT( currentFieldChanged() ) );
connect( mButton, SIGNAL( clicked() ), this, SLOT( editExpression() ) );
connect( mFieldProxyModel, SIGNAL( modelAboutToBeReset() ), this, SLOT( beforeResetModel() ) );
connect( mFieldProxyModel, SIGNAL( modelReset() ), this, SLOT( afterResetModel() ) );
// NW TODO - Fix in 2.6
// connect( mCombo->lineEdit(), SIGNAL( returnPressed() ), this, SIGNAL( returnPressed() ) );
mExpressionContext.reset( new QgsExpressionContext() );
mExpressionContext->appendScope( QgsExpressionContextUtils::globalScope() );
mExpressionContext->appendScope( QgsExpressionContextUtils::projectScope() );
}
