plasma-framework/private/nativetabbar.cpp
Marco Martin 9cfe6246ec make the tabbar widget stretch also in height (thus umbreaking it in the
panel), with a dirty hack on minimum/maximum sizes, but i think it's the
only way for now, since minimumTabSizeHint() and maximumTabSizeHint()
are private in QTabBar and will be protected probably not before Qt5 O.o

svn path=/trunk/KDE/kdelibs/; revision=886098
2008-11-18 15:27:04 +00:00

411 lines
11 KiB
C++

/*
Copyright 2007 Robert Knight <robertknight@gmail.com>
Copyright 2008 Marco Martin <notmart@gmail.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
// Own
#include "nativetabbar_p.h"
// Qt
#include <QIcon>
#include <QMouseEvent>
#include <QPainter>
#include <QApplication>
#include <QStyleOption>
#include <QToolButton>
#include <QGradient>
#include <QLinearGradient>
// KDE
#include <kdebug.h>
#include <kcolorutils.h>
#include "plasma/plasma.h"
#include "plasma/theme.h"
#include "plasma/animator.h"
#include "plasma/framesvg.h"
#include "plasma/paintutils.h"
//#include "private/style_p.h"
namespace Plasma
{
class NativeTabBarPrivate
{
public:
NativeTabBarPrivate(NativeTabBar *parent)
: q(parent),
backgroundSvg(0),
buttonSvg(0),
animationId(-1)
{
}
~NativeTabBarPrivate()
{
delete backgroundSvg;
delete buttonSvg;
}
void syncBorders();
void storeLastIndex();
NativeTabBar *q;
QTabBar::Shape shape; //used to keep track of shape() changes
FrameSvg *backgroundSvg;
qreal left, top, right, bottom;
FrameSvg *buttonSvg;
qreal buttonLeft, buttonTop, buttonRight, buttonBottom;
int animationId;
QRect currentAnimRect;
int lastIndex[2];
qreal animProgress;
};
void NativeTabBarPrivate::syncBorders()
{
backgroundSvg->getMargins(left, top, right, bottom);
buttonSvg->getMargins(buttonLeft, buttonTop, buttonRight, buttonBottom);
}
void NativeTabBarPrivate::storeLastIndex()
{
// if first run
if (lastIndex[0] == -1) {
lastIndex[1] = q->currentIndex();
}
lastIndex[0] = lastIndex[1];
lastIndex[1] = q->currentIndex();
}
NativeTabBar::NativeTabBar(QWidget *parent)
: KTabBar(parent),
d(new NativeTabBarPrivate(this))
{
d->backgroundSvg = new Plasma::FrameSvg();
d->backgroundSvg->setImagePath("widgets/frame");
d->backgroundSvg->setElementPrefix("sunken");
d->buttonSvg = new Plasma::FrameSvg();
d->buttonSvg->setImagePath("widgets/button");
d->buttonSvg->setElementPrefix("normal");
d->syncBorders();
d->lastIndex[0] = -1;
connect(this, SIGNAL(currentChanged(int)), this, SLOT(startAnimation()));
setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
}
NativeTabBar::~NativeTabBar()
{
delete d;
}
QRect NativeTabBar::tabRect(int index) const
{
QRect rect = KTabBar::tabRect(index).translated(d->left, d->top);
if (isVertical()) {
rect.setWidth(rect.width() - d->right - d->left);
}
return rect;
}
int NativeTabBar::lastIndex() const
{
return d->lastIndex[0];
}
QSize NativeTabBar::tabSizeHint(int index) const
{
//return KTabBar::tabSizeHint(index);
QSize hint = tabSize(index);
int minwidth = 0;
int minheight = 0;
int maxwidth = 0;
Shape s = shape();
switch (s) {
case RoundedSouth:
case TriangularSouth:
case RoundedNorth:
case TriangularNorth:
if (count() > 0) {
for (int i = count() - 1; i >= 0; i--) {
minwidth += tabSize(i).width();
}
minwidth += d->left + d->right;
if (minwidth < width()) {
hint.rwidth() += (width() - minwidth) / count();
}
hint.rheight() += d->top + d->bottom;
}
break;
case RoundedWest:
case TriangularWest:
case RoundedEast:
case TriangularEast:
if (count() > 0) {
for (int i = count() - 1; i >= 0; i--) {
minheight += tabSize(i).height();
if (tabSize(i).width() > maxwidth) {
maxwidth = tabSize(i).width();
}
}
minheight += d->top + d->bottom;
if (minheight < height()) {
hint.rheight() += (height() - minheight) / count();
}
hint.rwidth() = maxwidth + d->left + d->right;
}
break;
}
return hint;
}
//FIXME: this shouldn't be necessary but it seems to return wring numbers the base implementation?
QSize NativeTabBar::sizeHint() const
{
int width = 0;
int height = 0;
if (isVertical()) {
for (int i = count() - 1; i >= 0; i--) {
height += tabRect(i).height();
}
width = tabRect(0).width();
} else {
for (int i = count() - 1; i >= 0; i--) {
width += tabRect(i).width();
}
height = tabRect(0).height();
}
return QSize(width + d->left + d->right, height + d->top + d->bottom);
}
void NativeTabBar::paintEvent(QPaintEvent *event)
{
if (!styleSheet().isNull()) {
KTabBar::paintEvent(event);
return;
}
QPainter painter(this);
//int numTabs = count();
//bool ltr = painter.layoutDirection() == Qt::LeftToRight; // Not yet used
d->backgroundSvg->paintFrame(&painter);
// Drawing Tabborders
QRect movingRect;
if (d->currentAnimRect.isNull()) {
movingRect = tabRect(currentIndex());
} else {
movingRect = d->currentAnimRect;
}
//resizing here because in resizeevent the first time is invalid (still no tabs)
d->buttonSvg->resizeFrame(movingRect.size());
d->buttonSvg->paintFrame(&painter, movingRect.topLeft());
QFontMetrics metrics(painter.font());
for (int i = 0; i < count(); i++) {
QRect rect = tabRect(i).adjusted(d->buttonLeft, d->buttonTop,
-d->buttonRight, -d->buttonBottom);
// draw tab icon
QRect iconRect = QRect(rect.x(), rect.y(), iconSize().width(), iconSize().height());
iconRect.moveCenter(QPoint(iconRect.center().x(), rect.center().y()));
tabIcon(i).paint(&painter, iconRect);
// draw tab text
if (i == currentIndex() && d->animProgress == 1) {
painter.setPen(Plasma::Theme::defaultTheme()->color(Theme::ButtonTextColor));
} else {
QColor color(Plasma::Theme::defaultTheme()->color(Theme::TextColor));
if (!isTabEnabled(i)) {
color.setAlpha(140);
}
painter.setPen(color);
}
QRect textRect = rect;
if (!tabIcon(i).isNull()) {
textRect.setLeft(iconRect.right());
}
painter.drawText(textRect, Qt::AlignCenter | Qt::TextHideMnemonic, tabText(i));
}
QRect scrollButtonsRect;
foreach (QObject *child, children()) {
QToolButton *childWidget = qobject_cast<QToolButton *>(child);
if (childWidget) {
if (!childWidget->isVisible()) {
continue;
}
if (scrollButtonsRect.isValid()) {
scrollButtonsRect = scrollButtonsRect.united(childWidget->geometry());
} else {
scrollButtonsRect = childWidget->geometry();
}
}
}
if (scrollButtonsRect.isValid()) {
scrollButtonsRect.adjust(2, 4, -2, -4);
painter.save();
QColor background(Plasma::Theme::defaultTheme()->color(Theme::BackgroundColor));
background.setAlphaF(0.75);
painter.setRenderHint(QPainter::Antialiasing);
painter.fillPath(PaintUtils::roundedRectangle(scrollButtonsRect, 5), background);
painter.restore();
QStyleOption so;
so.initFrom(this);
so.palette.setColor(QPalette::ButtonText,
Plasma::Theme::defaultTheme()->color(Theme::TextColor));
so.rect = scrollButtonsRect.adjusted(0, 0, -scrollButtonsRect.width() / 2, 0);
style()->drawPrimitive(QStyle::PE_IndicatorArrowLeft, &so, &painter, this);
so.rect = scrollButtonsRect.adjusted(scrollButtonsRect.width() / 2, 0, 0, 0);
style()->drawPrimitive(QStyle::PE_IndicatorArrowRight, &so, &painter, this);
}
}
void NativeTabBar::resizeEvent(QResizeEvent *event)
{
KTabBar::resizeEvent(event);
d->currentAnimRect = tabRect(currentIndex());
d->backgroundSvg->resizeFrame(size());
update();
}
void NativeTabBar::tabInserted(int index)
{
KTabBar::tabInserted(index);
emit sizeHintChanged();
}
void NativeTabBar::tabRemoved(int index)
{
KTabBar::tabRemoved(index);
emit sizeHintChanged();
}
void NativeTabBar::tabLayoutChange()
{
KTabBar::tabLayoutChange();
if (shape() != d->shape) {
d->shape = shape();
emit shapeChanged(d->shape);
}
}
void NativeTabBar::startAnimation()
{
d->storeLastIndex();
Plasma::Animator::self()->customAnimation(
10, 150, Plasma::Animator::EaseInOutCurve, this, "onValueChanged");
}
void NativeTabBar::onValueChanged(qreal value)
{
if ((d->animProgress = value) == 1.0) {
animationFinished();
return;
}
// animation rect
QRect rect = tabRect(currentIndex());
QRect lastRect = tabRect(lastIndex());
int x = isHorizontal() ? (int)(lastRect.x() - value * (lastRect.x() - rect.x())) : rect.x();
int y = isHorizontal() ? rect.y() : (int)(lastRect.y() - value * (lastRect.y() - rect.y()));
QSizeF sz = lastRect.size() - value * (lastRect.size() - rect.size());
d->currentAnimRect = QRect(x, y, (int)(sz.width()), (int)(sz.height()));
update();
}
void NativeTabBar::animationFinished()
{
d->currentAnimRect = QRect();
update();
}
bool NativeTabBar::isVertical() const
{
Shape s = shape();
if(s == RoundedWest ||
s == RoundedEast ||
s == TriangularWest ||
s == TriangularEast) {
return true;
}
return false;
}
bool NativeTabBar::isHorizontal() const
{
return !isVertical();
}
QSize NativeTabBar::tabSize(int index) const
{
QSize hint;
const QFontMetrics metrics(QApplication::font());
const QSize textSize = metrics.size(Qt::TextHideMnemonic, tabText(index));
hint.rwidth() = textSize.width() + iconSize().width();
hint.rheight() = qMax(iconSize().height(), textSize.height());
hint.rwidth() += d->buttonLeft + d->buttonRight;
hint.rheight() += d->buttonTop + d->buttonBottom;
//FIXME: this margin calculation isn't reeeally right...
if (isVertical()) {
hint.rwidth() = qMax(hint.width(), int(minimumWidth() - d->left - d->right - d->buttonLeft - d->buttonRight));
} else {
hint.rheight() = qMax(hint.height(), int(minimumHeight() - d->top - d->bottom - d->buttonTop - d->buttonBottom));
}
return hint;
}
} // namespace Plasma
#include "nativetabbar_p.moc"