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kwin/kcmkwin/kwindecoration/buttons.cpp

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/*
This is the new kwindecoration kcontrol module
Copyright (c) 2009, Urs Wolfer <uwolfer @ kde.org>
Copyright (c) 2004, Sandro Giessl <sandro@giessl.com>
Copyright (c) 2001
Karol Szwed <gallium@kde.org>
http://gallium.n3.net/
Supports new kwin configuration plugins, and titlebar button position
modification via dnd interface.
Based on original "kwintheme" (Window Borders)
Copyright (C) 2001 Rik Hemsley (rikkus) <rik@kde.org>
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.
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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "buttons.h"
#include "pixmaps.h"
#include <QApplication>
#include <QPainter>
#include <QLabel>
#include <QLayout>
#include <QMimeData>
#include <QScrollBar>
#include <klocale.h>
#include <kglobalsettings.h>
#include <kdecorationfactory.h>
#define BUTTONDRAGMIMETYPE "application/x-kde_kwindecoration_buttons"
namespace KWin
{
ButtonDrag::ButtonDrag(Button btn)
: QMimeData()
{
QByteArray data;
QDataStream stream(&data, QIODevice::WriteOnly);
stream << btn.name;
stream << btn.icon;
stream << btn.type.unicode();
stream << (int) btn.duplicate;
stream << (int) btn.supported;
setData(BUTTONDRAGMIMETYPE, data);
}
bool ButtonDrag::canDecode(QDropEvent* e)
{
return e->mimeData()->hasFormat(BUTTONDRAGMIMETYPE);
}
bool ButtonDrag::decode(QDropEvent* e, Button& btn)
{
QByteArray data = e->mimeData()->data(BUTTONDRAGMIMETYPE);
if (data.size()) {
e->accept();
QDataStream stream(data);
stream >> btn.name;
stream >> btn.icon;
ushort type;
stream >> type;
btn.type = QChar(type);
int duplicate;
stream >> duplicate;
btn.duplicate = duplicate;
int supported;
stream >> supported;
btn.supported = supported;
return true;
}
return false;
}
Button::Button()
{
}
Button::Button(const QString& n, const QBitmap& i, QChar t, bool d, bool s)
: name(n),
icon(i),
type(t),
duplicate(d),
supported(s)
{
}
Button::~Button()
{
}
// helper function to deal with the Button's bitmaps more easily...
QPixmap bitmapPixmap(const QBitmap& bm, const QColor& color)
{
QPixmap pm(bm.size());
pm.fill(Qt::white);
QPainter p(&pm);
p.setPen(color);
p.drawPixmap(0, 0, bm);
p.end();
pm.setMask(pm.createMaskFromColor(Qt::white));
return pm;
}
ButtonSource::ButtonSource(QWidget *parent)
: QListWidget(parent)
{
setDragEnabled(true);
setAcceptDrops(true);
setDropIndicatorShown(false);
setSortingEnabled(true);
}
ButtonSource::~ButtonSource()
{
}
QSize ButtonSource::sizeHint() const
{
// make the sizeHint height a bit smaller than the one of QListView...
ensurePolished();
QSize s;
if (verticalScrollBar()->isVisible())
s.setWidth(s.width() + style()->pixelMetric(QStyle::PM_ScrollBarExtent));
s += QSize(frameWidth() * 2, frameWidth() * 2);
// size hint: 4 lines of text...
s.setHeight(s.height() + fontMetrics().lineSpacing() * 3);
return s;
}
void ButtonSource::hideAllButtons()
{
for (int i = 0; i < count(); i++) {
item(i)->setHidden(true);
}
}
void ButtonSource::showAllButtons()
{
for (int i = 0; i < count(); i++) {
item(i)->setHidden(false);
}
}
void ButtonSource::showButton(QChar btn)
{
for (int i = 0; i < count(); i++) {
ButtonSourceItem *buttonItem = dynamic_cast<ButtonSourceItem*>(item(i));
if (buttonItem && buttonItem->button().type == btn) {
item(i)->setHidden(false);
return;
}
}
}
void ButtonSource::hideButton(QChar btn)
{
for (int i = 0; i < count(); i++) {
ButtonSourceItem *buttonItem = dynamic_cast<ButtonSourceItem*>(item(i));
if (buttonItem && buttonItem->button().type == btn && !buttonItem->button().duplicate) {
item(i)->setHidden(true);
return;
}
}
}
void ButtonSource::dragMoveEvent(QDragMoveEvent *e)
{
e->setAccepted(ButtonDrag::canDecode(e));
}
void ButtonSource::dragEnterEvent(QDragEnterEvent *e)
{
e->setAccepted(ButtonDrag::canDecode(e));
}
void ButtonSource::dropEvent(QDropEvent *e)
{
if (ButtonDrag::canDecode(e)) {
emit dropped();
e->accept();
} else {
e->ignore();
}
}
void ButtonSource::mousePressEvent(QMouseEvent *e)
{
ButtonSourceItem *i = dynamic_cast<ButtonSourceItem*>(itemAt(e->pos()));
if (i) {
ButtonDrag *bd = new ButtonDrag(i->button());
QDrag *drag = new QDrag(this);
drag->setMimeData(bd);
drag->setPixmap(bitmapPixmap(i->button().icon, palette().color(QPalette::WindowText)));
drag->exec();
}
}
ButtonDropSiteItem::ButtonDropSiteItem(const Button& btn)
: m_button(btn)
{
}
ButtonDropSiteItem::~ButtonDropSiteItem()
{
}
Button ButtonDropSiteItem::button()
{
return m_button;
}
int ButtonDropSiteItem::width()
{
// return m_button.icon.width();
return 20;
}
int ButtonDropSiteItem::height()
{
// return m_button.icon.height();
return 20;
}
void ButtonDropSiteItem::draw(QPainter *p, const QPalette& cg, const QRect &r)
{
if (m_button.supported)
p->setPen(cg.color(QPalette::WindowText));
else
p->setPen(cg.color(QPalette::Disabled, QPalette::WindowText));
QBitmap &i = m_button.icon;
p->drawPixmap(r.left() + (r.width() - i.width()) / 2, r.top() + (r.height() - i.height()) / 2, i);
}
ButtonDropSite::ButtonDropSite(QWidget* parent)
: QFrame(parent),
m_selected(0)
{
setAcceptDrops(true);
setFrameShape(WinPanel);
setFrameShadow(Raised);
setMinimumHeight(26);
setMaximumHeight(26);
setMinimumWidth(250); // Ensure buttons will fit
setCursor(Qt::OpenHandCursor);
}
ButtonDropSite::~ButtonDropSite()
{
clearLeft();
clearRight();
}
void ButtonDropSite::clearLeft()
{
while (!buttonsLeft.isEmpty()) {
ButtonDropSiteItem *item = buttonsLeft.first();
if (removeButton(item)) {
emit buttonRemoved(item->button().type);
delete item;
}
}
}
void ButtonDropSite::clearRight()
{
while (!buttonsRight.isEmpty()) {
ButtonDropSiteItem *item = buttonsRight.first();
if (removeButton(item)) {
emit buttonRemoved(item->button().type);
delete item;
}
}
}
void ButtonDropSite::dragMoveEvent(QDragMoveEvent* e)
{
QPoint p = e->pos();
if (leftDropArea().contains(p) || rightDropArea().contains(p) || buttonAt(p)) {
e->accept();
// 2 pixel wide drop visualizer...
QRect r = contentsRect();
int x = -1;
if (leftDropArea().contains(p)) {
x = leftDropArea().left();
} else if (rightDropArea().contains(p)) {
x = rightDropArea().right() + 1;
} else {
ButtonDropSiteItem *item = buttonAt(p);
if (item) {
if (p.x() < item->rect.left() + item->rect.width() / 2) {
x = item->rect.left();
} else {
x = item->rect.right() + 1;
}
}
}
if (x != -1) {
QRect tmpRect(x, r.y(), 2, r.height());
if (tmpRect != m_oldDropVisualizer) {
cleanDropVisualizer();
m_oldDropVisualizer = tmpRect;
update(tmpRect);
}
}
} else {
e->ignore();
cleanDropVisualizer();
}
}
void ButtonDropSite::cleanDropVisualizer()
{
if (m_oldDropVisualizer.isValid()) {
QRect rect = m_oldDropVisualizer;
m_oldDropVisualizer = QRect(); // rect is invalid
update(rect);
}
}
void ButtonDropSite::dragEnterEvent(QDragEnterEvent* e)
{
if (ButtonDrag::canDecode(e))
e->accept();
}
void ButtonDropSite::dragLeaveEvent(QDragLeaveEvent* /* e */)
{
cleanDropVisualizer();
}
void ButtonDropSite::dropEvent(QDropEvent* e)
{
cleanDropVisualizer();
QPoint p = e->pos();
// collect information where to insert the dropped button
ButtonList *buttonList = 0;
int buttonPosition;
if (leftDropArea().contains(p)) {
buttonList = &buttonsLeft;
buttonPosition = buttonsLeft.size();
} else if (rightDropArea().contains(p)) {
buttonList = &buttonsRight;
buttonPosition = 0;
} else {
ButtonDropSiteItem *aboveItem = buttonAt(p);
if (!aboveItem)
return; // invalid drop. hasn't occurred _over_ a button (or left/right dropArea), return...
int pos;
if (!getItemPos(aboveItem, buttonList, pos)) {
// didn't find the aboveItem. unlikely to happen since buttonAt() already seems to have found
// something valid. anyway...
return;
}
// got the list and the aboveItem position. now determine if the item should be inserted
// before aboveItem or after aboveItem.
QRect aboveItemRect = aboveItem->rect;
if (!aboveItemRect.isValid())
return;
if (p.x() < aboveItemRect.left() + aboveItemRect.width() / 2) {
// insert before the item
buttonPosition = pos;
} else {
buttonPosition = pos + 1;
}
}
// know where to insert the button. now see if we can use an existing item (drag within the widget = move)
// orneed to create a new one
ButtonDropSiteItem *buttonItem = 0;
if (e->source() == this && m_selected) {
ButtonList *oldList = 0;
int oldPos;
if (getItemPos(m_selected, oldList, oldPos)) {
if (oldPos == buttonPosition && oldList == buttonList)
return; // button didn't change its position during the drag...
oldList->removeAt(oldPos);
buttonItem = m_selected;
// If we're inserting to the right of oldPos, in the same list,
// better adjust the index..
if (buttonList == oldList && buttonPosition > oldPos)
--buttonPosition;
} else {
return; // m_selected not found, return...
}
} else {
// create new button from the drop object...
Button btn;
if (ButtonDrag::decode(e, btn)) {
buttonItem = new ButtonDropSiteItem(btn);
} else {
return; // something has gone wrong while we were trying to decode the drop event
}
}
// now the item can actually be inserted into the list! :)
(*buttonList).insert(buttonPosition, buttonItem);
emit buttonAdded(buttonItem->button().type);
emit changed();
recalcItemGeometry();
update();
}
bool ButtonDropSite::getItemPos(ButtonDropSiteItem *item, ButtonList* &list, int &pos)
{
if (!item)
return false;
pos = buttonsLeft.indexOf(item); // try the left list first...
if (pos >= 0) {
list = &buttonsLeft;
return true;
}
pos = buttonsRight.indexOf(item); // try the right list...
if (pos >= 0) {
list = &buttonsRight;
return true;
}
list = 0;
pos = -1;
return false;
}
QRect ButtonDropSite::leftDropArea()
{
// return a 10 pixel drop area...
QRect r = contentsRect();
int leftButtonsWidth = calcButtonListWidth(buttonsLeft);
return QRect(r.left() + leftButtonsWidth, r.top(), 10, r.height());
}
QRect ButtonDropSite::rightDropArea()
{
// return a 10 pixel drop area...
QRect r = contentsRect();
int rightButtonsWidth = calcButtonListWidth(buttonsRight);
return QRect(r.right() - rightButtonsWidth - 10, r.top(), 10, r.height());
}
void ButtonDropSite::mousePressEvent(QMouseEvent* e)
{
QDrag *drag = new QDrag(this);
m_selected = buttonAt(e->pos());
if (m_selected) {
ButtonDrag *bd = new ButtonDrag(m_selected->button());
drag->setMimeData(bd);
drag->setPixmap(bitmapPixmap(m_selected->button().icon, palette().color(QPalette::WindowText)));
drag->exec();
}
}
void ButtonDropSite::resizeEvent(QResizeEvent*)
{
recalcItemGeometry();
}
void ButtonDropSite::recalcItemGeometry()
{
QRect r = contentsRect();
// update the geometry of the items in the left button list
int offset = r.left();
for (ButtonList::const_iterator it = buttonsLeft.constBegin(); it != buttonsLeft.constEnd(); ++it) {
int w = (*it)->width();
(*it)->rect = QRect(offset, r.top(), w, (*it)->height());
offset += w;
}
// the right button list...
offset = r.right() - calcButtonListWidth(buttonsRight);
for (ButtonList::const_iterator it = buttonsRight.constBegin(); it != buttonsRight.constEnd(); ++it) {
int w = (*it)->width();
(*it)->rect = QRect(offset, r.top(), w, (*it)->height());
offset += w;
}
}
ButtonDropSiteItem *ButtonDropSite::buttonAt(QPoint p)
{
// try to find the item in the left button list
for (ButtonList::const_iterator it = buttonsLeft.constBegin(); it != buttonsLeft.constEnd(); ++it) {
if ((*it)->rect.contains(p)) {
return *it;
}
}
// try to find the item in the right button list
for (ButtonList::const_iterator it = buttonsRight.constBegin(); it != buttonsRight.constEnd(); ++it) {
if ((*it)->rect.contains(p)) {
return *it;
}
}
return 0;
}
bool ButtonDropSite::removeButton(ButtonDropSiteItem *item)
{
if (!item)
return false;
// try to remove the item from the left button list
if (buttonsLeft.removeAll(item) >= 1) {
return true;
}
// try to remove the item from the right button list
if (buttonsRight.removeAll(item) >= 1) {
return true;
}
return false;
}
int ButtonDropSite::calcButtonListWidth(const ButtonList& btns)
{
int w = 0;
for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
w += (*it)->width();
}
return w;
}
bool ButtonDropSite::removeSelectedButton()
{
bool succ = removeButton(m_selected);
if (succ) {
emit buttonRemoved(m_selected->button().type);
emit changed();
delete m_selected;
m_selected = 0;
recalcItemGeometry();
update(); // repaint...
}
return succ;
}
void ButtonDropSite::drawButtonList(QPainter *p, const ButtonList& btns, int offset)
{
for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
QRect itemRect = (*it)->rect;
if (itemRect.isValid()) {
(*it)->draw(p, palette(), itemRect);
}
offset += (*it)->width();
}
}
void ButtonDropSite::paintEvent(QPaintEvent* /*pe*/)
{
QPainter p(this);
int leftoffset = calcButtonListWidth(buttonsLeft);
int rightoffset = calcButtonListWidth(buttonsRight);
int offset = 3;
QRect r = contentsRect();
// Shrink by 1
r.translate(1 + leftoffset, 1);
r.setWidth(r.width() - 2 - leftoffset - rightoffset);
r.setHeight(r.height() - 2);
drawButtonList(&p, buttonsLeft, offset);
QColor c1(palette().color(QPalette::Mid));
p.fillRect(r, c1);
p.setPen(palette().color(QPalette::WindowText));
p.setFont(KGlobalSettings::windowTitleFont());
p.drawText(r.adjusted(4, 0, -4, 0), Qt::AlignLeft | Qt::AlignVCenter, i18n("KDE"));
offset = geometry().width() - 3 - rightoffset;
drawButtonList(&p, buttonsRight, offset);
if (m_oldDropVisualizer.isValid()) {
p.fillRect(m_oldDropVisualizer, Qt::Dense4Pattern);
}
}
ButtonSourceItem::ButtonSourceItem(QListWidget * parent, const Button& btn)
: QListWidgetItem(parent),
m_button(btn)
{
setButton(btn);
}
ButtonSourceItem::~ButtonSourceItem()
{
}
void ButtonSourceItem::setButton(const Button& btn)
{
m_button = btn;
if (btn.supported) {
setText(btn.name);
setIcon(bitmapPixmap(btn.icon, QApplication::palette().color(QPalette::Text)));
setForeground(QApplication::palette().brush(QPalette::Text));
} else {
setText(i18n("%1 (unavailable)", btn.name));
setIcon(bitmapPixmap(btn.icon, QApplication::palette().color(QPalette::Disabled, QPalette::Text)));
setForeground(QApplication::palette().brush(QPalette::Disabled, QPalette::Text));
}
}
Button ButtonSourceItem::button() const
{
return m_button;
}
ButtonPositionWidget::ButtonPositionWidget(QWidget *parent)
: QWidget(parent),
m_factory(0)
{
QVBoxLayout *layout = new QVBoxLayout(this);
layout->setMargin(0);
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
QLabel* label = new QLabel(this);
m_dropSite = new ButtonDropSite(this);
label->setWordWrap(true);
label->setText(i18n("To add or remove titlebar buttons, simply <i>drag</i> items "
"between the available item list and the titlebar preview. Similarly, "
"drag items within the titlebar preview to re-position them."));
m_buttonSource = new ButtonSource(this);
m_buttonSource->setObjectName(QLatin1String("button_source"));
layout->addWidget(label);
layout->addWidget(m_dropSite);
layout->addWidget(m_buttonSource);
connect(m_dropSite, SIGNAL(buttonAdded(QChar)), m_buttonSource, SLOT(hideButton(QChar)));
connect(m_dropSite, SIGNAL(buttonRemoved(QChar)), m_buttonSource, SLOT(showButton(QChar)));
connect(m_buttonSource, SIGNAL(dropped()), m_dropSite, SLOT(removeSelectedButton()));
connect(m_dropSite, SIGNAL(changed()), SIGNAL(changed()));
// insert all possible buttons into the source (backwards to keep the preferred order...)
bool dummy;
m_supportedButtons = "MSHIAX_FBLR"; // support all buttons
new ButtonSourceItem(m_buttonSource, getButton('R', dummy));
new ButtonSourceItem(m_buttonSource, getButton('L', dummy));
new ButtonSourceItem(m_buttonSource, getButton('B', dummy));
new ButtonSourceItem(m_buttonSource, getButton('F', dummy));
new ButtonSourceItem(m_buttonSource, getButton('X', dummy));
new ButtonSourceItem(m_buttonSource, getButton('A', dummy));
new ButtonSourceItem(m_buttonSource, getButton('I', dummy));
new ButtonSourceItem(m_buttonSource, getButton('H', dummy));
new ButtonSourceItem(m_buttonSource, getButton('S', dummy));
new ButtonSourceItem(m_buttonSource, getButton('M', dummy));
new ButtonSourceItem(m_buttonSource, getButton('_', dummy));
}
ButtonPositionWidget::~ButtonPositionWidget()
{
}
Button ButtonPositionWidget::getButton(QChar type, bool& success)
{
success = true;
if (type == 'R') {
QBitmap bmp = QBitmap::fromData(QSize(resize_width, resize_height), resize_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Resize"), bmp, 'R', false, m_supportedButtons.contains('R'));
} else if (type == 'L') {
QBitmap bmp = QBitmap::fromData(QSize(shade_width, shade_height), shade_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Shade"), bmp, 'L', false, m_supportedButtons.contains('L'));
} else if (type == 'B') {
QBitmap bmp = QBitmap::fromData(QSize(keepbelowothers_width, keepbelowothers_height), keepbelowothers_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Keep Below Others"), bmp, 'B', false, m_supportedButtons.contains('B'));
} else if (type == 'F') {
QBitmap bmp = QBitmap::fromData(QSize(keepaboveothers_width, keepaboveothers_height), keepaboveothers_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Keep Above Others"), bmp, 'F', false, m_supportedButtons.contains('F'));
} else if (type == 'X') {
QBitmap bmp = QBitmap::fromData(QSize(close_width, close_height), close_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Close"), bmp, 'X', false, m_supportedButtons.contains('X'));
} else if (type == 'A') {
QBitmap bmp = QBitmap::fromData(QSize(maximize_width, maximize_height), maximize_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Maximize"), bmp, 'A', false, m_supportedButtons.contains('A'));
} else if (type == 'I') {
QBitmap bmp = QBitmap::fromData(QSize(minimize_width, minimize_height), minimize_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Minimize"), bmp, 'I', false, m_supportedButtons.contains('I'));
} else if (type == 'H') {
QBitmap bmp = QBitmap::fromData(QSize(help_width, help_height), help_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Help"), bmp, 'H', false, m_supportedButtons.contains('H'));
} else if (type == 'S') {
QBitmap bmp = QBitmap::fromData(QSize(onalldesktops_width, onalldesktops_height), onalldesktops_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("On All Desktops"), bmp, 'S', false, m_supportedButtons.contains('S'));
} else if (type == 'M') {
QBitmap bmp = QBitmap::fromData(QSize(menu_width, menu_height), menu_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("Menu"), bmp, 'M', false, m_supportedButtons.contains('M'));
} else if (type == '_') {
QBitmap bmp = QBitmap::fromData(QSize(spacer_width, spacer_height), spacer_bits);
bmp.createMaskFromColor(Qt::white);
return Button(i18n("--- spacer ---"), bmp, '_', true, m_supportedButtons.contains('_'));
} else {
success = false;
return Button();
}
}
QString ButtonPositionWidget::buttonsLeft() const
{
ButtonList btns = m_dropSite->buttonsLeft;
QString btnString = "";
for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
btnString.append((*it)->button().type);
}
return btnString;
}
QString ButtonPositionWidget::buttonsRight() const
{
ButtonList btns = m_dropSite->buttonsRight;
QString btnString = "";
for (ButtonList::const_iterator it = btns.constBegin(); it != btns.constEnd(); ++it) {
btnString.append((*it)->button().type);
}
return btnString;
}
void ButtonPositionWidget::setButtonsLeft(const QString &buttons)
{
// to keep the button lists consistent, first remove all left buttons, then add buttons again...
m_dropSite->clearLeft();
for (int i = 0; i < buttons.length(); ++i) {
bool succ = false;
Button btn = getButton(buttons[i], succ);
if (succ) {
m_dropSite->buttonsLeft.append(new ButtonDropSiteItem(btn));
m_buttonSource->hideButton(btn.type);
}
}
m_dropSite->recalcItemGeometry();
m_dropSite->update();
}
void ButtonPositionWidget::setButtonsRight(const QString &buttons)
{
// to keep the button lists consistent, first remove all left buttons, then add buttons again...
m_dropSite->clearRight();
for (int i = 0; i < buttons.length(); ++i) {
bool succ = false;
Button btn = getButton(buttons[i], succ);
if (succ) {
m_dropSite->buttonsRight.append(new ButtonDropSiteItem(btn));
m_buttonSource->hideButton(btn.type);
}
}
m_dropSite->recalcItemGeometry();
m_dropSite->update();
}
} // namespace KWin
#include "buttons.moc"
// vim: ts=4
// kate: space-indent off; tab-width 4;
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