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/***************************************************************************
wdisplay.cpp - description
-------------------
begin : Fri Jun 21 2002
copyright : (C) 2002 by Tue & Ken Haste Andersen
email : haste@diku.dk
***************************************************************************/
/***************************************************************************
* *
* 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 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "widget/wdisplay.h"
#include <QPainter>
#include <QPaintEvent>
#include <QtDebug>
#include <QPixmap>
#include "widget/wpixmapstore.h"
WDisplay::WDisplay(QWidget * parent)
: WWidget(parent),
m_pPixmapBack(NULL),
m_bDisabledLoaded(false) {
setPositions(0);
}
WDisplay::~WDisplay() {
resetPositions();
}
void WDisplay::setup(QDomNode node) {
// Set background pixmap if available
if (!selectNode(node, "BackPath").isNull()) {
setPixmapBackground(getPath(selectNodeQString(node, "BackPath")));
}
// Number of states
setPositions(selectNodeInt(node, "NumberStates"));
// Load knob pixmaps
QString path = selectNodeQString(node, "Path");
for (int i = 0; i < m_pixmaps.size(); ++i) {
setPixmap(&m_pixmaps, i, getPath(path.arg(i)));
}
// See if disabled images is defined, and load them...
if (!selectNode(node, "DisabledPath").isNull()) {
QString disabledPath = selectNodeQString(node, "DisabledPath");
for (int i = 0; i < m_disabledPixmaps.size(); ++i) {
setPixmap(&m_disabledPixmaps, i,
getPath(disabledPath.arg(i)));
}
m_bDisabledLoaded = true;
}
}
void WDisplay::setPositions(int iNoPos) {
resetPositions();
if (iNoPos < 0) {
qWarning() << "Negative NumberStates for Display.";
iNoPos = 0;
}
// QVector inserts NULLs for the new pixmaps.
m_pixmaps.resize(iNoPos);
m_disabledPixmaps.resize(iNoPos);
}
void WDisplay::resetPositions() {
m_pPixmapBack.clear();
m_pixmaps.resize(0);
m_disabledPixmaps.resize(0);
}
void WDisplay::setPixmapBackground(const QString& filename) {
m_pPixmapBack = WPixmapStore::getPixmap(filename);
if (m_pPixmapBack.isNull() || m_pPixmapBack->isNull()) {
qDebug() << metaObject()->className()
<< "Error loading background pixmap:" << filename;
}
}
void WDisplay::setPixmap(QVector<QPixmapPointer>* pPixmaps, int iPos,
const QString& filename) {
if (iPos < 0 || iPos >= pPixmaps->size()) {
return;
}
QPixmapPointer pPixmap = WPixmapStore::getPixmap(filename);
if (pPixmap.isNull() || pPixmap->isNull()) {
qDebug() << metaObject()->className()
<< "Error loading pixmap:" << filename;
} else {
(*pPixmaps)[iPos] = pPixmap;
setFixedSize(pPixmap->size());
}
}
int WDisplay::getActivePixmapIndex() const {
return static_cast<int>(
m_value * static_cast<double>(m_pixmaps.size()) / 128.0);
}
void WDisplay::paintEvent(QPaintEvent* ) {
QPainter p(this);
if (m_pPixmapBack) {
p.drawPixmap(0, 0, *m_pPixmapBack);
}
// If we are disabled, use the disabled pixmaps. If not, use the regular
// pixmaps.
const QVector<QPixmapPointer>& pixmaps = (m_bOff && m_bDisabledLoaded) ?
m_disabledPixmaps : m_pixmaps;
if (pixmaps.empty()) {
return;
}
int idx = getActivePixmapIndex();
// Clamp active pixmap index to valid ranges.
if (idx < 0) {
idx = 0;
} else if (idx >= pixmaps.size()) {
idx = pixmaps.size() - 1;
}
QPixmapPointer pPixmap = pixmaps[idx];
if (pPixmap) {
p.drawPixmap(0, 0, *pPixmap);
}
}
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