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// Copyright (C) 2016 Jochen Becher
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "palettebox.h"
#include "qmt/infrastructure/qmtassert.h"
#include <QPainter>
#include <QMouseEvent>
#include <QKeyEvent>
namespace qmt {
PaletteBox::PaletteBox(QWidget *parent)
: QWidget(parent),
m_brushes(6),
m_pens(6)
{
setFocusPolicy(Qt::StrongFocus);
}
PaletteBox::~PaletteBox()
{
}
QBrush PaletteBox::brush(int index) const
{
QMT_ASSERT(index >= 0 && index <= m_brushes.size(), return QBrush());
return m_brushes.at(index);
}
void PaletteBox::setBrush(int index, const QBrush &brush)
{
QMT_ASSERT(index >= 0 && index <= m_brushes.size(), return);
if (m_brushes[index] != brush) {
m_brushes[index] = brush;
update();
}
}
QPen PaletteBox::linePen(int index) const
{
QMT_ASSERT(index >= 0 && index <= m_pens.size(), return QPen());
return m_pens.at(index);
}
void PaletteBox::setLinePen(int index, const QPen &pen)
{
QMT_ASSERT(index >= 0 && index <= m_pens.size(), return);
if (m_pens[index] != pen) {
m_pens[index] = pen;
update();
}
}
void PaletteBox::clear()
{
setCurrentIndex(-1);
}
void PaletteBox::setCurrentIndex(int index)
{
if (m_currentIndex != index) {
if (index >= 0 && index < m_brushes.size())
m_currentIndex = index;
else
m_currentIndex = -1;
update();
}
}
void PaletteBox::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event)
QPainter painter(this);
qreal w = static_cast<qreal>(width()) / static_cast<qreal>(m_brushes.size());
qreal h = height();
for (int i = 0; i < m_brushes.size(); ++i) {
QBrush brush = m_brushes.at(i);
if (i == m_currentIndex) {
painter.fillRect(QRectF(i * w, 0, w, h), brush);
QPen pen = m_pens.at(i);
pen.setWidth(2);
painter.setPen(pen);
painter.drawRect(QRectF(i * w + 1, 1, w - 2, h - 2));
} else {
painter.fillRect(QRectF(i * w, 0, w, h), brush);
}
}
if (hasFocus()) {
painter.setBrush(Qt::NoBrush);
QPen pen;
pen.setColor(Qt::black);
pen.setStyle(Qt::DotLine);
painter.setPen(pen);
painter.drawRect(0, 0, width() - 1, height() - 1);
}
}
void PaletteBox::mousePressEvent(QMouseEvent *event)
{
qreal w = static_cast<qreal>(width()) / static_cast<qreal>(m_brushes.size());
int i = static_cast<int>((event->x() / w));
QMT_ASSERT(i >= 0 && i < m_brushes.size(), return);
setCurrentIndex(i);
if (m_currentIndex >= 0 && m_currentIndex < m_brushes.size())
emit activated(m_currentIndex);
}
void PaletteBox::keyPressEvent(QKeyEvent *event)
{
bool isKnownKey = false;
switch (event->key()) {
case Qt::Key_Left:
if (m_currentIndex <= 0)
setCurrentIndex((m_brushes.size() - 1));
else
setCurrentIndex(m_currentIndex - 1);
isKnownKey = true;
break;
case Qt::Key_Right:
if (m_currentIndex < 0 || m_currentIndex >= m_brushes.size() - 1)
setCurrentIndex(0);
else
setCurrentIndex(m_currentIndex + 1);
isKnownKey = true;
break;
}
if (isKnownKey && m_currentIndex >= 0 && m_currentIndex < m_brushes.size())
emit activated(m_currentIndex);
}
} // namespace qmt
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