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[plasmalnf] Implement a delegate for drawing the list of themes

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This commit is contained in:
Adriaan de Groot 2020-11-30 11:19:00 +01:00
parent cc6611bac4
commit cf538fb837
1 changed files with 48 additions and 4 deletions
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52
src/modules/plasmalnf/PlasmaLnfPage.cpp
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@ -18,8 +18,52 @@
#include "utils/Retranslator.h"
#include <QHeaderView>
#include <QListView>
#include <QStyledItemDelegate>
#include <QTableView>
class ThemeDelegate : public QStyledItemDelegate
{
public:
using QStyledItemDelegate::QStyledItemDelegate;
void paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const override;
// The size of the item is constant
QSize sizeHint( const QStyleOptionViewItem&, const QModelIndex& ) const override;
};
QSize
ThemeDelegate::sizeHint( const QStyleOptionViewItem&, const QModelIndex& ) const
{
QSize image( ThemesModel::imageSize() );
return { 3 * image.width(), image.height() };
}
void
ThemeDelegate::paint( QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index ) const
{
auto label = index.data( ThemesModel::LabelRole ).toString();
auto description = index.data( ThemesModel::DescriptionRole ).toString();
auto image_v = index.data( ThemesModel::ImageRole );
QPixmap image = image_v.canConvert< QPixmap >() ? qvariant_cast< QPixmap >( image_v ) : QPixmap();
// The delegate paints three "columns", each of which takes 1/3
// of the space: label, description and screenshot.
QRect labelRect( option.rect );
labelRect.setWidth( labelRect.width() / 3 );
QStyleOptionButton rbOption;
rbOption.state |= QStyle::State_Enabled | QStyle::State_On;
rbOption.rect = labelRect;
rbOption.text = label;
option.widget->style()->drawControl( QStyle::CE_RadioButton, &rbOption, painter, option.widget );
labelRect.moveLeft( labelRect.width() );
option.widget->style()->drawItemText(
painter, labelRect, Qt::AlignLeft | Qt::AlignVCenter | Qt::TextWordWrap, option.palette, false, description );
labelRect.moveLeft( 2 * labelRect.width() );
option.widget->style()->drawItemPixmap( painter, labelRect, Qt::AlignHCenter | Qt::AlignVCenter, image );
}
PlasmaLnfPage::PlasmaLnfPage( Config* config, QWidget* parent )
@ -42,10 +86,10 @@ PlasmaLnfPage::PlasmaLnfPage( Config* config, QWidget* parent )
"selection will give you a live preview of that look-and-feel." ) );
} )
QTableView* view = new QTableView( this );
auto* view = new QListView( this );
view->setModel( m_config->themeModel() );
view->verticalHeader()->hide();
view->horizontalHeader()->hide();
view->setItemDelegate( new ThemeDelegate( view ) );
view->setUniformItemSizes( true );
ui->verticalLayout->addWidget( view );
connect( view->selectionModel(),