//---------------------------------------------------------------------------
/*
QtLeftRightRectItem, QGraphicsRectItem with a left and right rectangle
Copyright (C) 2012-2015 Richel Bilderbeek
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 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program.If not, see <http://www.gnu.org/licenses/>.
*/
//---------------------------------------------------------------------------
//From http://www.richelbilderbeek.nl/CppQtLeftRightRectItem.htm
//---------------------------------------------------------------------------
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
#include "qtleftrightrectitem.h"
#include <cassert>
#include <sstream>
//#include <QGraphicsScene>
#include <QPainter>
#include <QKeyEvent>
#pragma GCC diagnostic pop
ribi::QtLeftRightRectItem::QtLeftRightRectItem(QGraphicsItem* parent)
: QGraphicsRectItem(parent),
m_signal_request_scene_update{},
m_focus(Focus::left)
{
this->setFlags(
QGraphicsItem::ItemIsFocusable
| QGraphicsItem::ItemIsMovable
| QGraphicsItem::ItemIsSelectable);
this->setRect(-16.0,-16.0,32.0,32.0);
}
std::string ribi::QtLeftRightRectItem::GetVersion() noexcept
{
return "1.1";
}
std::vector<std::string> ribi::QtLeftRightRectItem::GetVersionHistory() noexcept
{
std::vector<std::string> v;
v.push_back("2012-12-19: version 1.0: initial version");
v.push_back("2013-07-25: version 1.1: transition to Qt5");
return v;
}
void ribi::QtLeftRightRectItem::keyPressEvent(QKeyEvent* event)
{
switch (event->key())
{
case Qt::Key_F1:
{
m_focus = Focus::left;
this->update();
//m_signal_request_scene_update();
//return;
}
break;
case Qt::Key_F2:
{
{
m_focus = Focus::right;
this->update();
//m_signal_request_scene_update();
//return;
}
}
break;
}
QGraphicsRectItem::keyPressEvent(event);
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
void ribi::QtLeftRightRectItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
{
m_signal_request_scene_update();
QGraphicsRectItem::mouseMoveEvent(event);
}
#pragma GCC diagnostic pop
void ribi::QtLeftRightRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* , QWidget* )
{
//Always draw the outer rect
if (this->hasFocus() || this->isSelected())
{
painter->setPen(QPen(Qt::DashLine));
}
painter->drawRect(rect());
painter->setPen(QPen(Qt::SolidLine));
const double hw = 0.5 * rect().width(); //Half-width
QRectF rect_left = rect().adjusted( 2.0,2.0,-hw-2.0,-2.0);
QRectF rect_right = rect().adjusted(hw+2.0,2.0, -2.0,-2.0);
//The item can be selected by clicking on it
//The item can have focus by moving towards it
switch (m_focus)
{
case Focus::left:
{
painter->drawRect(rect_right);
painter->setPen(QPen(QColor(255,0,0)));
painter->drawRect(rect_left);
}
break;
case Focus::right:
{
painter->drawRect(rect_left);
painter->setPen(QPen(QColor(255,0,0)));
painter->drawRect(rect_right);
}
break;
default: assert(!"Should not get here");
}
}
|
