plasma-framework/theme.cpp

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/*
* Copyright 2006-2007 Aaron Seigo <aseigo@kde.org>
*
* This program 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, 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 Library 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 "theme.h"
#include <QApplication>
#include <QFile>
#include <KWindowSystem>
#include <KColorScheme>
#include <KConfigGroup>
#include <KDebug>
#include <KSharedConfig>
#include <KStandardDirs>
namespace Plasma
{
class Theme::Private
{
public:
Private()
{
generalFont = QApplication::font();
}
KConfigGroup config()
{
QString groupName = "Theme";
if (!app.isEmpty() && app != "plasma") {
groupName.append("-").append(app);
}
KSharedConfigPtr config = KSharedConfig::openConfig("plasmarc");
return KConfigGroup(config, groupName);
}
QString themeName;
QString app;
KSharedConfigPtr colors;
QFont generalFont;
};
class ThemeSingleton
{
public:
Theme self;
};
K_GLOBAL_STATIC( ThemeSingleton, privateThemeSelf )
Theme* Theme::self()
{
return &privateThemeSelf->self;
}
Theme::Theme(QObject* parent)
: QObject(parent),
d(new Private)
{
settingsChanged();
}
Theme::~Theme()
{
d->config().writeEntry("name", d->themeName);
delete d;
}
void Theme::setApplication(const QString &appname)
{
if (d->app != appname) {
d->app = appname;
settingsChanged();
}
}
void Theme::settingsChanged()
{
setThemeName(d->config().readEntry("name", "default"));
}
void Theme::setThemeName(const QString &themeName)
{
QString theme = themeName;
if (theme.isEmpty() || theme == d->themeName) {
// let's try and get the default theme at least
if (d->themeName.isEmpty()) {
theme = "default";
} else {
return;
}
}
//TODO: should we care about names with relative paths in them?
QString themePath = KStandardDirs::locate("data", "desktoptheme/" + theme + "/");
if (themePath.isEmpty() && d->themeName.isEmpty()) {
themePath = KStandardDirs::locate("data", "desktoptheme/default/");
if (themePath.isEmpty()) {
return;
}
theme = "default";
}
d->themeName = theme;
// load the color scheme config
QString colorsFile = KStandardDirs::locate("data", "desktoptheme/" + theme + "/colors");
//kDebug() << "we're going for..." << colorsFile << "*******************";
if (colorsFile.isEmpty()) {
d->colors = 0;
} else {
d->colors = KSharedConfig::openConfig(colorsFile);
}
emit changed();
}
QString Theme::themeName() const
{
return d->themeName;
}
QString Theme::image( const QString& name ) const
{
//TODO: performance ... should we try and cache the results of KStandardDirs::locate?
// should we just use whatever theme path was returned and not care about cascades?
// (probably "no" on the last question)
QString search;
QString path;
bool compositingActive = KWindowSystem::compositingActive();
if (!compositingActive) {
search = "desktoptheme/" + d->themeName + "/opaque/" + name + ".svg";
path = KStandardDirs::locate( "data", search );
}
//not found or compositing enabled
if (path.isEmpty()) {
search = "desktoptheme/" + d->themeName + '/' + name + ".svg";
path = KStandardDirs::locate( "data", search );
}
if (path.isEmpty()) {
if (d->themeName != "default") {
if (!compositingActive) {
search = "desktoptheme/default/opaque/" + name + ".svg";
path = KStandardDirs::locate("data", search);
}
if (path.isEmpty()) {
search = "desktoptheme/default/" + name + ".svg";
path = KStandardDirs::locate("data", search);
}
}
if (path.isEmpty()) {
kDebug() << "Theme says: bad image path " << name
<< "; looked in: " << search << endl;
}
}
return path;
}
KSharedConfigPtr Theme::colors() const
{
return d->colors;
}
QColor Theme::textColor() const
{
KColorScheme colors(QPalette::Active, KColorScheme::Window, Theme::self()->colors());
return colors.foreground(KColorScheme::NormalText).color();
}
QColor Theme::backgroundColor() const
{
KColorScheme colors(QPalette::Active, KColorScheme::Window, Theme::self()->colors());
return colors.background().color();
}
void Theme::setFont(const QFont &font)
{
d->generalFont = font;
}
QFont Theme::font() const
{
//TODO: allow this to be overridden with a plasma specific font?
return d->generalFont;
}
QFontMetrics Theme::fontMetrics() const
{
//TODO: allow this to be overridden with a plasma specific font?
return QFontMetrics(d->generalFont);
}
}
#include <theme.moc>