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/*
* treeview.cc
* Copyright 2018 John Lindgren
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions, and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions, and the following disclaimer in the documentation
* provided with the distribution.
*
* This software is provided "as is" and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising from
* the use of this software.
*/
#include "treeview.h"
#include <QApplication>
#include <QKeyEvent>
#include <QMouseEvent>
#include <QProxyStyle>
#include <libaudcore/index.h>
namespace audqt
{
/*
* On some platforms (mainly KDE), there is a feature where
* clicking on icons makes them work like hyperlinks. Unfortunately,
* the way this is implemented is by making all QAbstractItemView
* widgets behave in this way.
*
* In all situations, it makes no sense for audqt::TreeView
* widgets to behave in this way. So we override that feature
* with a QProxyStyle.
*/
class TreeViewStyleOverrides : public QProxyStyle
{
public:
TreeViewStyleOverrides()
{
// detect and respond to application-wide style change
connect(qApp->style(), &QObject::destroyed, this,
&TreeViewStyleOverrides::resetBaseStyle);
}
int styleHint(StyleHint hint, const QStyleOption * option = nullptr,
const QWidget * widget = nullptr,
QStyleHintReturn * returnData = nullptr) const override
{
if (hint == QStyle::SH_ItemView_ActivateItemOnSingleClick)
return 0;
return QProxyStyle::styleHint(hint, option, widget, returnData);
}
private:
void resetBaseStyle()
{
setBaseStyle(nullptr);
connect(qApp->style(), &QObject::destroyed, this,
&TreeViewStyleOverrides::resetBaseStyle);
}
};
EXPORT TreeView::TreeView(QWidget * parent) : QTreeView(parent)
{
auto style = new TreeViewStyleOverrides;
style->setParent(this);
setStyle(style);
// activate() is perhaps a bit redundant with activated()
connect(this, &QTreeView::activated, this, &TreeView::activate);
}
EXPORT TreeView::~TreeView() {}
EXPORT void TreeView::keyPressEvent(QKeyEvent * event)
{
auto CtrlShiftAlt =
Qt::ShiftModifier | Qt::ControlModifier | Qt::AltModifier;
if (event->key() == Qt::Key_Delete && !(event->modifiers() & CtrlShiftAlt))
{
removeSelectedRows();
return;
}
QTreeView::keyPressEvent(event);
}
EXPORT void TreeView::removeSelectedRows()
{
// get all selected rows
Index<int> rows;
for (auto & idx : selectionModel()->selectedRows())
rows.append(idx.row());
// sort in reverse order
rows.sort([](const int & a, const int & b) { return b - a; });
// remove rows in reverse order
auto m = model();
for (int row : rows)
m->removeRow(row);
}
// TODO: unnecessary, remove at next API break
EXPORT void TreeView::mouseDoubleClickEvent(QMouseEvent * event)
{
QTreeView::mouseDoubleClickEvent(event);
}
EXPORT void TreeView::activate(const QModelIndex & index)
{
(void)index; // base implementation does nothing
}
} // namespace audqt
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