515 lines
14 KiB
C++
515 lines
14 KiB
C++
/*
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* Copyright (C) 2007 Petri Damsten <damu@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "meter.h"
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#include <cmath>
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#include <QPainter>
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#include <QTimeLine>
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#include <kdebug.h>
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#include <kglobalsettings.h>
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#include "plasma/animator.h"
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#include "plasma/framesvg.h"
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#include "plasma/theme.h"
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namespace Plasma {
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class MeterPrivate
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{
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public:
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MeterPrivate(Meter *m)
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: minimum(0),
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maximum(100),
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value(0),
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targetValue(0),
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meterType(Meter::AnalogMeter),
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image(0),
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minrotate(0),
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maxrotate(360),
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meter(m),
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movementId(0)
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{
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}
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void progressChanged(qreal progress)
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{
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bool over = qFuzzyCompare(progress, 1.0);
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if (value == targetValue) {
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if (!over && movementId) {
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Animator::self()->stopCustomAnimation(movementId);
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}
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return;
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}
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if (over) {
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value = targetValue;
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//kDebug() << "done";
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movementId = 0;
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} else {
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int frame = progress * 10;
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int delta = targetValue - value;
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value += (delta / qreal(10 - frame));
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//kDebug() << frame << value << targetValue;
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}
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meter->update();
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}
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void paint(QPainter *p, const QString &elementID)
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{
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if (image->hasElement(elementID)) {
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QRectF elementRect = image->elementRect(elementID);
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image->paint(p, elementRect, elementID);
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}
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}
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void text(QPainter *p, int index)
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{
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QString elementID = QString("label%1").arg(index);
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QString text = labels[index];
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if (image->hasElement(elementID)) {
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QRectF elementRect = image->elementRect(elementID);
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Qt::Alignment align = Qt::AlignCenter;
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if (colors.count() > index) {
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p->setPen(QPen(colors[index]));
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}
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if (fonts.count() > index) {
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p->setFont(fonts[index]);
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}
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if (alignments.count() > index) {
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align = alignments[index];
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}
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if (elementRect.width() > elementRect.height()) {
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p->drawText(elementRect, align, text);
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} else {
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p->save();
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QPointF rotateCenter(
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elementRect.left() + elementRect.width() / 2,
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elementRect.top() + elementRect.height() / 2);
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p->translate(rotateCenter);
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p->rotate(-90);
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p->translate(elementRect.height() / -2,
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elementRect.width() / -2);
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QRectF r(0, 0, elementRect.height(), elementRect.width());
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p->drawText(r, align, text);
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p->restore();
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}
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}
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}
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QRectF barRect()
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{
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if (labels.count() > 0) {
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return image->elementRect("background");
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} else {
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return QRectF(QPoint(0,0), meter->size());
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}
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}
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void paintBackground(QPainter *p)
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{
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//be retrocompatible with themes for kde <= 4.1
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if (image->hasElement("background-center")) {
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QRectF elementRect = barRect();
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QSize imageSize = image->size();
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image->resize();
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image->setElementPrefix("background");
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image->resizeFrame(elementRect.size());
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image->paintFrame(p, elementRect.topLeft());
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image->resize(imageSize);
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paintBar(p, "bar-inactive");
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} else {
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paint(p, "background");
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}
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}
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void paintBar(QPainter *p, const QString &prefix)
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{
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QRectF elementRect = barRect();
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QSize imageSize = image->size();
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image->resize();
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QSize tileSize = image->elementSize("bar-active-center");
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if (elementRect.width() > elementRect.height()) {
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qreal ratio = tileSize.height() / tileSize.width();
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int numTiles = elementRect.width()/(elementRect.height()/ratio);
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tileSize = QSize(elementRect.width()/numTiles, elementRect.height());
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QPoint center = elementRect.center().toPoint();
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elementRect.setWidth(tileSize.width()*numTiles);
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elementRect.moveCenter(center);
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} else {
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qreal ratio = tileSize.width() / tileSize.height();
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int numTiles = elementRect.height()/(elementRect.width()/ratio);
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tileSize = QSize(elementRect.width(), elementRect.height()/numTiles);
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QPoint center = elementRect.center().toPoint();
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elementRect.setHeight(tileSize.height()*numTiles);
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elementRect.moveCenter(center);
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}
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image->setElementPrefix(prefix);
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image->resizeFrame(tileSize);
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p->drawTiledPixmap(elementRect, image->framePixmap());
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image->resize(imageSize);
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}
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void paintForeground(QPainter *p)
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{
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for (int i = 0; i < labels.count(); ++i) {
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text(p, i);
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}
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paint(p, "foreground");
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}
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void setSizePolicyAndPreferredSize()
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{
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switch (meterType) {
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case Meter::BarMeterHorizontal:
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meter->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
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break;
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case Meter::BarMeterVertical:
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meter->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::MinimumExpanding);
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break;
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case Meter::AnalogMeter:
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default:
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meter->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
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break;
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}
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if (image) {
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//set a sane preferredSize. We can't just use the svg's native size, since that way
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//letters get cut off if the user uses a font larger then usual. Check how many rows of
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//labels we have, add 1 (the progress bar), and multiply by the font height to get a
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//somewhat sane size height. This is not perfect but work well enough for 4.2. I suggest
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//we look into alternatives for 4.3.
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uint i = 0;
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uint rows = 0;
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qreal prevY = -1;
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QString labelName = "label0";
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while (image->hasElement(labelName)) {
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if (image->elementRect(labelName).y() > prevY) {
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prevY = image->elementRect(labelName).y();
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rows++;
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}
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i++;
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labelName = QString("label%0").arg(i);
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}
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Plasma::Theme *theme = Plasma::Theme::defaultTheme();
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QFont font = theme->font(Plasma::Theme::DefaultFont);
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QFontMetrics fm(font);
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meter->setPreferredHeight((rows + 1) * fm.height());
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} else {
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meter->setPreferredSize(QSizeF(30, 30));
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}
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}
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int minimum;
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int maximum;
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int value;
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int targetValue;
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QStringList labels;
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QList<Qt::Alignment> alignments;
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QList<QColor> colors;
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QList<QFont> fonts;
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QString svg;
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Meter::MeterType meterType;
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Plasma::FrameSvg *image;
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int minrotate;
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int maxrotate;
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Meter *meter;
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int movementId;
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};
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Meter::Meter(QGraphicsItem *parent) :
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QGraphicsWidget(parent),
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d(new MeterPrivate(this))
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{
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d->setSizePolicyAndPreferredSize();
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}
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Meter::~Meter()
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{
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delete d;
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}
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void Meter::setMaximum(int maximum)
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{
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d->maximum = maximum;
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}
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int Meter::maximum() const
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{
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return d->maximum;
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}
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void Meter::setMinimum(int minimum)
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{
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d->minimum = minimum;
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}
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int Meter::minimum() const
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{
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return d->minimum;
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}
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void Meter::setValue(int value)
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{
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if (value == d->targetValue) {
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return;
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}
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d->targetValue = qBound(d->minimum, value, d->maximum);
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int delta = abs(d->value - d->targetValue);
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if (d->movementId) {
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Animator::self()->stopCustomAnimation(d->movementId);
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d->movementId = 0;
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}
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//kDebug() << d->targetValue << d->value << delta;
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if (!(KGlobalSettings::graphicEffectsLevel() & KGlobalSettings::SimpleAnimationEffects) ||
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delta / qreal(d->maximum) < 0.1) {
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d->value = value;
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update();
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} else {
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d->movementId = Animator::self()->customAnimation(10, 100, Animator::EaseOutCurve,
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this, "progressChanged");
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}
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}
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int Meter::value() const
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{
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return d->value;
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}
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void Meter::setLabel(int index, const QString &text)
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{
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while (d->labels.count() <= index) {
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d->labels << QString();
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}
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d->labels[index] = text;
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}
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QString Meter::label(int index) const
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{
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return d->labels[index];
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}
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void Meter::setLabelColor(int index, const QColor &color)
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{
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while (d->colors.count() <= index) {
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d->colors << color;
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}
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d->colors[index] = color;
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}
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QColor Meter::labelColor(int index) const
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{
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return d->colors[index];
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}
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void Meter::setLabelFont(int index, const QFont &font)
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{
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while (d->fonts.count() <= index) {
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d->fonts << font;
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}
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d->fonts[index] = font;
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}
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QFont Meter::labelFont(int index) const
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{
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return d->fonts[index];
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}
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void Meter::setLabelAlignment(int index, Qt::Alignment alignment)
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{
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while (d->alignments.count() <= index) {
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d->alignments << alignment;
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}
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d->alignments[index] = alignment;
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}
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Qt::Alignment Meter::labelAlignment(int index) const
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{
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return d->alignments[index];
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}
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QRectF Meter::labelRect(int index) const
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{
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QString elementID = QString("label%1").arg(index);
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return d->image->elementRect(elementID);
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}
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void Meter::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
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{
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Q_UNUSED(sourceName)
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foreach (const QVariant &v, data) {
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if (v.type() == QVariant::Int ||
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v.type() == QVariant::UInt ||
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v.type() == QVariant::LongLong ||
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v.type() == QVariant::ULongLong) {
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setValue(v.toInt());
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return;
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}
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}
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}
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void Meter::setSvg(const QString &svg)
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{
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d->svg = svg;
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delete d->image;
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d->image = new Plasma::FrameSvg(this);
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d->image->setImagePath(svg);
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// To create renderer and get default size
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d->image->resize();
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d->setSizePolicyAndPreferredSize();
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if (d->image->hasElement("rotateminmax")) {
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QRectF r = d->image->elementRect("rotateminmax");
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d->minrotate = (int)r.height();
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d->maxrotate = (int)r.width();
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}
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}
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QString Meter::svg() const
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{
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return d->svg;
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}
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void Meter::setMeterType(MeterType meterType)
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{
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d->meterType = meterType;
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if (d->svg.isEmpty()) {
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if (meterType == BarMeterHorizontal) {
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setSvg("widgets/bar_meter_horizontal");
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} else if (meterType == BarMeterVertical) {
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setSvg("widgets/bar_meter_vertical");
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} else if (meterType == AnalogMeter) {
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setSvg("widgets/analog_meter");
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}
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}
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d->setSizePolicyAndPreferredSize();
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}
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Meter::MeterType Meter::meterType() const
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{
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return d->meterType;
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}
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void Meter::paint(QPainter *p,
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const QStyleOptionGraphicsItem *option,
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QWidget *widget)
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{
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Q_UNUSED(option)
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Q_UNUSED(widget)
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if (!d->image) {
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return;
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}
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QRectF rect(QPointF(0, 0), size());
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QRectF clipRect;
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qreal percentage = 0.0;
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qreal angle = 0.0;
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QPointF rotateCenter;
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QSize intSize = QSize((int)size().width(), (int)size().height());
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if (intSize != d->image->size()) {
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d->image->resize(intSize);
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}
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if (d->maximum != d->minimum) {
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percentage = (qreal)d->value / (d->maximum - d->minimum);
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}
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p->setRenderHint(QPainter::SmoothPixmapTransform);
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switch (d->meterType) {
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case BarMeterHorizontal:
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case BarMeterVertical:
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d->paintBackground(p);
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p->save();
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clipRect = d->barRect();
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if (clipRect.width() > clipRect.height()) {
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clipRect.setWidth(clipRect.width() * percentage);
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} else {
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qreal bottom = clipRect.bottom();
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clipRect.setHeight(clipRect.height() * percentage);
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clipRect.moveBottom(bottom);
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}
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p->setClipRect(clipRect);
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//be retrocompatible
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if (d->image->hasElement("bar-active-center")) {
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d->paintBar(p, "bar-active");
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} else {
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d->paint(p, "bar");
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}
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p->restore();
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d->paintForeground(p);
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break;
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case AnalogMeter:
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d->paintBackground(p);
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p->save();
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if (d->image->hasElement("rotatecenter")) {
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QRectF r = d->image->elementRect("rotatecenter");
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rotateCenter = QPointF(r.left() + r.width() / 2,
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r.top() + r.height() / 2);
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} else {
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rotateCenter = QPointF(rect.width() / 2, rect.height() / 2);
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}
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angle = percentage * (d->maxrotate - d->minrotate) + d->minrotate;
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if (d->image->hasElement("pointer-shadow")) {
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p->save();
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p->translate(rotateCenter+QPoint(2,3));
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p->rotate(angle);
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p->translate(-1 * rotateCenter);
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d->paint(p, "pointer-shadow");
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p->restore();
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}
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p->translate(rotateCenter);
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p->rotate(angle);
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p->translate(-1 * rotateCenter);
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d->paint(p, "pointer");
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p->restore();
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d->paintForeground(p);
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break;
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}
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}
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} // End of namepace
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#include "meter.moc"
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