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kwin/clients/aurorae/themes/plastik/code/plastikbutton.cpp
Martin Gräßlin 5c3cd6f4bc Initial port of Aurorae to KDecoration2 
The port to KDecoration2 means quite some changes in the way how Aurorae
works. First of all: the theme to load is passed to the Deocoration ctor
and not searched for by Aurorae itself.

The rendering mechanismn didn't change significantly yet. It's still
rendering to an FBO and passing the image on. This needs some further
work as KDecoration2 does not support the padding any more. So all
themes using shadow are currently broken.

Another big change is the way how the rendering scene is constructed
and used. KDecoration2 doesn't want the the Decoration to be a native
window. But for being able to render a QtQuick scene at all we need a
QQuickWindow. Thus it creates a window parented to the decoration id,
but not accepting any input event. Input is nowadays controlled from
the outside: events are passed into the Decoration, so we don't want
the QtQuick window intercepting events.

In case of non-composited the normal FBO mechanism doesn't work and
Aurorae just renders to the QQuickWindow directly. This could use
some optimization in the decoration renderer in KWin core to not even
try to perform the normal rendering. On the other hand it's probably
too much a hassle for the use case.

The rendering architecture might hopefully be improved with Qt 5.4
and the new QQuickRenderControl class.

The QQuickWindow also exposes a problem for preview in the
kdecoration-viewer and the future KCM: we don't want a different
window, but best would be to get to the QML scene directly. A small
hack is added to have the previewers set a "visualParent" which Aurorae
uses to parent the QML scene to without the need to create a
QQuickWindow.
2014-10-24 13:48:31 +02:00

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/********************************************************************
Copyright (C) 2012 Martin Gräßlin <mgraesslin@kde.org>
Copyright (C) 2003-2005 Sandro Giessl <sandro@giessl.com>
based on the window decoration "Web":
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, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "plastikbutton.h"
#include <kdecoration.h>
#include <KColorScheme>
#include <KConfigGroup>
#include <KSharedConfig>
#include <QPainter>
namespace KWin
{
PlastikButtonProvider::PlastikButtonProvider()
: QQuickImageProvider(Pixmap)
{
}
QPixmap PlastikButtonProvider::requestPixmap(const QString &id, QSize *size, const QSize &requestedSize)
{
int origSize = requestedSize.isValid() ? qMin(requestedSize.width(), requestedSize.height()) : 10;
if (size) {
*size = QSize(origSize, origSize);
}
QStringList idParts = id.split(QStringLiteral("/"));
if (idParts.isEmpty()) {
// incorrect id
return QQuickImageProvider::requestPixmap(id, size, requestedSize);
}
bool active = false;
bool toggled = false;
bool shadow = false;
if (idParts.length() > 1 && idParts.at(1) == QStringLiteral("true")) {
active = true;
}
if (idParts.length() > 2 && idParts.at(2) == QStringLiteral("true")) {
toggled = true;
}
if (idParts.length() > 3 && idParts.at(3) == QStringLiteral("true")) {
shadow = true;
}
ButtonIcon button;
switch (static_cast<KDecorationDefines::DecorationButton>(idParts[0].toInt())) {
case KDecorationDefines::DecorationButtonClose:
button = CloseIcon;
break;
case KDecorationDefines::DecorationButtonMaximizeRestore:
if (toggled) {
button = MaxRestoreIcon;
} else {
button = MaxIcon;
}
break;
case KDecorationDefines::DecorationButtonMinimize:
button = MinIcon;
break;
case KDecorationDefines::DecorationButtonQuickHelp:
button = HelpIcon;
break;
case KDecorationDefines::DecorationButtonOnAllDesktops:
if (toggled) {
button = NotOnAllDesktopsIcon;
} else {
button = OnAllDesktopsIcon;
}
break;
case KDecorationDefines::DecorationButtonKeepAbove:
if (toggled) {
button = NoKeepAboveIcon;
} else {
button = KeepAboveIcon;
}
break;
case KDecorationDefines::DecorationButtonKeepBelow:
if (toggled) {
button = NoKeepBelowIcon;
} else {
button = KeepBelowIcon;
}
break;
case KDecorationDefines::DecorationButtonShade:
if (toggled) {
button = UnShadeIcon;
} else {
button = ShadeIcon;
}
break;
case KDecorationDefines::DecorationButtonApplicationMenu:
button = AppMenuIcon;
break;
default:
// not recognized icon
return QQuickImageProvider::requestPixmap(id, size, requestedSize);
}
return icon(button, origSize, active, shadow);
}
QPixmap PlastikButtonProvider::icon(ButtonIcon icon, int size, bool active, bool shadow)
{
if (size%2 == 0)
--size;
QPixmap image(size, size);
image.fill(Qt::transparent);
QPainter p(&image);
KConfigGroup wmConfig(KSharedConfig::openConfig(QStringLiteral("kdeglobals")), QStringLiteral("WM"));
const QColor color = wmConfig.readEntry("activeForeground", QPalette().color(QPalette::Active, QPalette::HighlightedText));
if (shadow) {
p.setPen(KColorScheme::shade(color, KColorScheme::ShadowShade));
} else {
p.setPen(color);
}
const QRect r = image.rect();
// line widths
int lwTitleBar = 1;
if (r.width() > 16) {
lwTitleBar = 4;
} else if (r.width() > 4) {
lwTitleBar = 2;
}
int lwArrow = 1;
if (r.width() > 16) {
lwArrow = 4;
} else if (r.width() > 7) {
lwArrow = 2;
}
switch(icon) {
case CloseIcon:
{
int lineWidth = 1;
if (r.width() > 16) {
lineWidth = 3;
} else if (r.width() > 4) {
lineWidth = 2;
}
drawObject(p, DiagonalLine, r.x(), r.y(), r.width(), lineWidth);
drawObject(p, CrossDiagonalLine, r.x(), r.bottom(), r.width(), lineWidth);
break;
}
case MaxIcon:
{
int lineWidth2 = 1; // frame
if (r.width() > 16) {
lineWidth2 = 2;
} else if (r.width() > 4) {
lineWidth2 = 1;
}
drawObject(p, HorizontalLine, r.x(), r.top(), r.width(), lwTitleBar);
drawObject(p, HorizontalLine, r.x(), r.bottom()-(lineWidth2-1), r.width(), lineWidth2);
drawObject(p, VerticalLine, r.x(), r.top(), r.height(), lineWidth2);
drawObject(p, VerticalLine, r.right()-(lineWidth2-1), r.top(), r.height(), lineWidth2);
break;
}
case MaxRestoreIcon:
{
int lineWidth2 = 1; // frame
if (r.width() > 16) {
lineWidth2 = 2;
} else if (r.width() > 4) {
lineWidth2 = 1;
}
int margin1, margin2;
margin1 = margin2 = lineWidth2*2;
if (r.width() < 8)
margin1 = 1;
// background window
drawObject(p, HorizontalLine, r.x()+margin1, r.top(), r.width()-margin1, lineWidth2);
drawObject(p, HorizontalLine, r.right()-margin2, r.bottom()-(lineWidth2-1)-margin1, margin2, lineWidth2);
drawObject(p, VerticalLine, r.x()+margin1, r.top(), margin2, lineWidth2);
drawObject(p, VerticalLine, r.right()-(lineWidth2-1), r.top(), r.height()-margin1, lineWidth2);
// foreground window
drawObject(p, HorizontalLine, r.x(), r.top()+margin2, r.width()-margin2, lwTitleBar);
drawObject(p, HorizontalLine, r.x(), r.bottom()-(lineWidth2-1), r.width()-margin2, lineWidth2);
drawObject(p, VerticalLine, r.x(), r.top()+margin2, r.height(), lineWidth2);
drawObject(p, VerticalLine, r.right()-(lineWidth2-1)-margin2, r.top()+margin2, r.height(), lineWidth2);
break;
}
case MinIcon:
{
drawObject(p, HorizontalLine, r.x(), r.bottom()-(lwTitleBar-1), r.width(), lwTitleBar);
break;
}
case HelpIcon:
{
int center = r.x()+r.width()/2 -1;
int side = r.width()/4;
// paint a question mark... code is quite messy, to be cleaned up later...! :o
if (r.width() > 16) {
int lineWidth = 3;
// top bar
drawObject(p, HorizontalLine, center-side+3, r.y(), 2*side-3-1, lineWidth);
// top bar rounding
drawObject(p, CrossDiagonalLine, center-side-1, r.y()+5, 6, lineWidth);
drawObject(p, DiagonalLine, center+side-3, r.y(), 5, lineWidth);
// right bar
drawObject(p, VerticalLine, center+side+2-lineWidth, r.y()+3, r.height()-(2*lineWidth+side+2+1), lineWidth);
// bottom bar
drawObject(p, CrossDiagonalLine, center, r.bottom()-2*lineWidth, side+2, lineWidth);
drawObject(p, HorizontalLine, center, r.bottom()-3*lineWidth+2, lineWidth, lineWidth);
// the dot
drawObject(p, HorizontalLine, center, r.bottom()-(lineWidth-1), lineWidth, lineWidth);
} else if (r.width() > 8) {
int lineWidth = 2;
// top bar
drawObject(p, HorizontalLine, center-(side-1), r.y(), 2*side-1, lineWidth);
// top bar rounding
if (r.width() > 9) {
drawObject(p, CrossDiagonalLine, center-side-1, r.y()+3, 3, lineWidth);
} else {
drawObject(p, CrossDiagonalLine, center-side-1, r.y()+2, 3, lineWidth);
}
drawObject(p, DiagonalLine, center+side-1, r.y(), 3, lineWidth);
// right bar
drawObject(p, VerticalLine, center+side+2-lineWidth, r.y()+2, r.height()-(2*lineWidth+side+1), lineWidth);
// bottom bar
drawObject(p, CrossDiagonalLine, center, r.bottom()-2*lineWidth+1, side+2, lineWidth);
// the dot
drawObject(p, HorizontalLine, center, r.bottom()-(lineWidth-1), lineWidth, lineWidth);
} else {
int lineWidth = 1;
// top bar
drawObject(p, HorizontalLine, center-(side-1), r.y(), 2*side, lineWidth);
// top bar rounding
drawObject(p, CrossDiagonalLine, center-side-1, r.y()+1, 2, lineWidth);
// right bar
drawObject(p, VerticalLine, center+side+1, r.y(), r.height()-(side+2+1), lineWidth);
// bottom bar
drawObject(p, CrossDiagonalLine, center, r.bottom()-2, side+2, lineWidth);
// the dot
drawObject(p, HorizontalLine, center, r.bottom(), 1, 1);
}
break;
}
case NotOnAllDesktopsIcon:
{
int lwMark = r.width()-lwTitleBar*2-2;
if (lwMark < 1)
lwMark = 3;
drawObject(p, HorizontalLine, r.x()+(r.width()-lwMark)/2, r.y()+(r.height()-lwMark)/2, lwMark, lwMark);
// Fall through to OnAllDesktopsIcon intended!
}
case OnAllDesktopsIcon:
{
// horizontal bars
drawObject(p, HorizontalLine, r.x()+lwTitleBar, r.y(), r.width()-2*lwTitleBar, lwTitleBar);
drawObject(p, HorizontalLine, r.x()+lwTitleBar, r.bottom()-(lwTitleBar-1), r.width()-2*lwTitleBar, lwTitleBar);
// vertical bars
drawObject(p, VerticalLine, r.x(), r.y()+lwTitleBar, r.height()-2*lwTitleBar, lwTitleBar);
drawObject(p, VerticalLine, r.right()-(lwTitleBar-1), r.y()+lwTitleBar, r.height()-2*lwTitleBar, lwTitleBar);
break;
}
case NoKeepAboveIcon:
{
int center = r.x()+r.width()/2;
// arrow
drawObject(p, CrossDiagonalLine, r.x(), center+2*lwArrow, center-r.x(), lwArrow);
drawObject(p, DiagonalLine, r.x()+center, r.y()+1+2*lwArrow, center-r.x(), lwArrow);
if (lwArrow>1)
drawObject(p, HorizontalLine, center-(lwArrow-2), r.y()+2*lwArrow, (lwArrow-2)*2, lwArrow);
// Fall through to KeepAboveIcon intended!
}
case KeepAboveIcon:
{
int center = r.x()+r.width()/2;
// arrow
drawObject(p, CrossDiagonalLine, r.x(), center, center-r.x(), lwArrow);
drawObject(p, DiagonalLine, r.x()+center, r.y()+1, center-r.x(), lwArrow);
if (lwArrow>1)
drawObject(p, HorizontalLine, center-(lwArrow-2), r.y(), (lwArrow-2)*2, lwArrow);
break;
}
case NoKeepBelowIcon:
{
int center = r.x()+r.width()/2;
// arrow
drawObject(p, DiagonalLine, r.x(), center-2*lwArrow, center-r.x(), lwArrow);
drawObject(p, CrossDiagonalLine, r.x()+center, r.bottom()-1-2*lwArrow, center-r.x(), lwArrow);
if (lwArrow>1)
drawObject(p, HorizontalLine, center-(lwArrow-2), r.bottom()-(lwArrow-1)-2*lwArrow, (lwArrow-2)*2, lwArrow);
// Fall through to KeepBelowIcon intended!
}
case KeepBelowIcon:
{
int center = r.x()+r.width()/2;
// arrow
drawObject(p, DiagonalLine, r.x(), center, center-r.x(), lwArrow);
drawObject(p, CrossDiagonalLine, r.x()+center, r.bottom()-1, center-r.x(), lwArrow);
if (lwArrow>1)
drawObject(p, HorizontalLine, center-(lwArrow-2), r.bottom()-(lwArrow-1), (lwArrow-2)*2, lwArrow);
break;
}
case ShadeIcon:
{
drawObject(p, HorizontalLine, r.x(), r.y(), r.width(), lwTitleBar);
break;
}
case UnShadeIcon:
{
int lw1 = 1;
int lw2 = 1;
if (r.width() > 16) {
lw1 = 4;
lw2 = 2;
} else if (r.width() > 7) {
lw1 = 2;
lw2 = 1;
}
int h = qMax( (r.width()/2), (lw1+2*lw2) );
// horizontal bars
drawObject(p, HorizontalLine, r.x(), r.y(), r.width(), lw1);
drawObject(p, HorizontalLine, r.x(), r.x()+h-(lw2-1), r.width(), lw2);
// vertical bars
drawObject(p, VerticalLine, r.x(), r.y(), h, lw2);
drawObject(p, VerticalLine, r.right()-(lw2-1), r.y(), h, lw2);
break;
}
case AppMenuIcon:
{
drawObject(p, HorizontalLine, r.x(), r.top()+(lwTitleBar-1), r.width(), lwTitleBar);
drawObject(p, HorizontalLine, r.x(), r.center().y(), r.width(), lwTitleBar);
drawObject(p, HorizontalLine, r.x(), r.bottom()-(lwTitleBar-1), r.width(), lwTitleBar);
break;
}
default:
break;
}
p.end();
return image;
}
void PlastikButtonProvider::drawObject(QPainter &p, Object object, int x, int y, int length, int lineWidth)
{
switch(object) {
case DiagonalLine:
if (lineWidth <= 1) {
for (int i = 0; i < length; ++i) {
p.drawPoint(x+i,y+i);
}
} else if (lineWidth <= 2) {
for (int i = 0; i < length; ++i) {
p.drawPoint(x+i,y+i);
}
for (int i = 0; i < (length-1); ++i) {
p.drawPoint(x+1+i,y+i);
p.drawPoint(x+i,y+1+i);
}
} else {
for (int i = 1; i < (length-1); ++i) {
p.drawPoint(x+i,y+i);
}
for (int i = 0; i < (length-1); ++i) {
p.drawPoint(x+1+i,y+i);
p.drawPoint(x+i,y+1+i);
}
for (int i = 0; i < (length-2); ++i) {
p.drawPoint(x+2+i,y+i);
p.drawPoint(x+i,y+2+i);
}
}
break;
case CrossDiagonalLine:
if (lineWidth <= 1) {
for (int i = 0; i < length; ++i) {
p.drawPoint(x+i,y-i);
}
} else if (lineWidth <= 2) {
for (int i = 0; i < length; ++i) {
p.drawPoint(x+i,y-i);
}
for (int i = 0; i < (length-1); ++i) {
p.drawPoint(x+1+i,y-i);
p.drawPoint(x+i,y-1-i);
}
} else {
for (int i = 1; i < (length-1); ++i) {
p.drawPoint(x+i,y-i);
}
for (int i = 0; i < (length-1); ++i) {
p.drawPoint(x+1+i,y-i);
p.drawPoint(x+i,y-1-i);
}
for (int i = 0; i < (length-2); ++i) {
p.drawPoint(x+2+i,y-i);
p.drawPoint(x+i,y-2-i);
}
}
break;
case HorizontalLine:
for (int i = 0; i < lineWidth; ++i) {
p.drawLine(x,y+i, x+length-1, y+i);
}
break;
case VerticalLine:
for (int i = 0; i < lineWidth; ++i) {
p.drawLine(x+i,y, x+i, y+length-1);
}
break;
default:
break;
}
}
} // namespace
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