workspace/plasma/applets/system-monitor/system-monitor.cpp

   1 /*
   2  *   Copyright (C) 2007 Petri Damsten <damu@iki.fi>
   3  *
   4  *   This program is free software; you can redistribute it and/or modify
   5  *   it under the terms of the GNU Library General Public License version 2 as
   6  *   published by the Free Software Foundation
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details
  12  *
  13  *   You should have received a copy of the GNU Library General Public
  14  *   License along with this program; if not, write to the
  15  *   Free Software Foundation, Inc.,
  16  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  17  */
  18
  19 #include "system-monitor.h"
  20 #include "monitorbutton.h"
  21 #include "applet.h"
  22 #include <QTimer>
  23 #include <QGraphicsLinearLayout>
  24 #include <KPushButton>
  25 #include <Plasma/Containment>
  26 #include <Plasma/Corona>
  27
  28 #define APPLETS 5
  29 static const char *sm_applets[][2] = {
  30     { "media-flash", "sm_temperature" },
  31     //{ "media-flash", "sm_ram" },
  32     { "cpu", "sm_cpu" },
  33     { "hwinfo", "sm_hwinfo" },
  34     { "network-workgroup", "sm_net" },
  35     { "drive-harddisk", "sm_hdd" }
  36 };
  37
  38 SystemMonitor::SystemMonitor(QObject *parent, const QVariantList &args)
  39     : Plasma::PopupApplet(parent, args), m_layout(0), m_buttons(0), m_widget(0)
  40 {
  41     resize(234 + 20 + 23, 80 + 20 + 25);
  42     setMinimumSize(QSize(234 + 20 + 23, 32 + 20 + 25));
  43     setAspectRatioMode(Plasma::IgnoreAspectRatio);
  44 }
  45
  46 SystemMonitor::~SystemMonitor()
  47 {
  48     QStringList appletNames;
  49     foreach (Plasma::Applet *applet, m_applets) {
  50         appletNames << applet->objectName();
  51         applet->destroy();
  52     }
  53
  54     KConfigGroup cg = config();
  55     cg.writeEntry("applets", appletNames);
  56 }
  57
  58 void SystemMonitor::init()
  59 {
  60     KConfigGroup cg = config();
  61     QStringList appletNames = cg.readEntry("applets", QStringList());
  62
  63     m_widget = new QGraphicsWidget(this);
  64     m_layout = new QGraphicsLinearLayout(Qt::Vertical);
  65     m_layout->setContentsMargins(0, 0, 0, 0);
  66     m_buttons = new QGraphicsLinearLayout(Qt::Horizontal);
  67     m_buttons->setContentsMargins(0, 0, 0, 0);
  68     m_buttons->setSpacing(5);
  69
  70     for (int i = 0; i < APPLETS; ++i) {
  71         MonitorButton *button = new MonitorButton(m_widget);
  72         button->nativeWidget()->setObjectName(sm_applets[i][1]);
  73         button->nativeWidget()->setCheckable(true);
  74         button->setImage(sm_applets[i][0]);
  75         if (appletNames.contains(sm_applets[i][1])) {
  76             button->nativeWidget()->setChecked(true);
  77         }
  78         connect(button->nativeWidget(), SIGNAL(toggled(bool)), this, SLOT(toggled(bool)));
  79         m_buttons->addItem(button);
  80     }
  81     m_layout->addItem(m_buttons);
  82     foreach (const QString& applet, appletNames) {
  83         addApplet(applet);
  84     }
  85     m_widget->setLayout(m_layout);
  86     checkGeometry();
  87
  88     m_widget->setMinimumSize(QSize(234 + 20 + 23, 32 + 20 + 25));
  89     setPopupIcon("utilities-system-monitor");
  90 }
  91
  92 void SystemMonitor::toggled(bool toggled)
  93 {
  94     removeApplet(sender()->objectName());
  95     if (toggled) {
  96         addApplet(sender()->objectName());
  97     }
  98 }
  99
 100 void SystemMonitor::addApplet(const QString &name)
 101 {
 102     kDebug() << "";
 103     if (name.isEmpty()) {
 104         return;
 105     }
 106     SM::Applet* applet = qobject_cast<SM::Applet*>(Plasma::Applet::load(name, 0, QVariantList() << "SM"));
 107     if (applet) {
 108         m_applets.append(applet);
 109         connect(applet, SIGNAL(geometryChecked()), this, SLOT(checkGeometry()));
 110         connect(applet, SIGNAL(destroyed(QObject*)), this, SLOT(appletRemoved(QObject*)));
 111         applet->setFlag(QGraphicsItem::ItemIsMovable, false);
 112         applet->init();
 113         applet->setBackgroundHints(Plasma::Applet::NoBackground);
 114         applet->setParentItem(m_widget);
 115         applet->setObjectName(name);
 116         m_layout->addItem(applet);
 117         //checkGeometry(applet->preferredSize().height());
 118     }
 119 }
 120
 121 void SystemMonitor::removeApplet(const QString &name)
 122 {
 123     foreach (SM::Applet *applet, m_applets) {
 124         if (applet->objectName() == name) {
 125             applet->destroy();
 126         }
 127     }
 128 }
 129
 130 void SystemMonitor::appletRemoved(QObject *object)
 131 {
 132     SM::Applet *applet = static_cast<SM::Applet*>(object);
 133
 134     foreach (SM::Applet *a, m_applets) {
 135         if (a == applet) {
 136             m_layout->removeItem(applet);
 137             m_applets.removeAll(applet);
 138             checkGeometry();
 139         }
 140     }
 141 }
 142
 143 void SystemMonitor::checkGeometry()
 144 {
 145     QSizeF margins = size() - contentsRect().size();
 146     qreal minHeight = 32 + 20 + 25; // m_buttons->minimumHeight();
 147     //kDebug() << minHeight;
 148
 149     foreach (SM::Applet *applet, m_applets) {
 150         //kDebug() << applet->minSize() << applet->minimumSize()
 151         //         << applet->metaObject()->className() << applet->size() - applet->contentsRect().size();
 152         minHeight += applet->minSize().height() + m_layout->spacing();
 153     }
 154     m_widget->setMinimumSize(DEFAULT_MINIMUM_WIDTH, minHeight);
 155
 156     QSizeF s(m_widget->size().width(), minHeight);
 157     if (m_applets.count() == 0) {
 158         // I want to be sure...
 159         s.setHeight(minHeight);
 160     }
 161
 162     if (formFactor() != Plasma::Horizontal && formFactor() != Plasma::Vertical) {
 163         setMinimumSize(m_widget->minimumSize() + margins);
 164     }
 165     resize(s + margins);
 166     m_widget->resize(s);
 167     update();
 168     /*
 169     kDebug() << m_widget->size().height() << m_layout->geometry().height();
 170     foreach (SM::Applet *applet, m_applets) {
 171         kDebug() << applet->metaObject()->className() << applet->size().height();
 172     }
 173     for (int i = 0; i < m_layout->count(); ++i) {
 174         kDebug() << m_layout->itemAt(i)->geometry().top() << m_layout->itemAt(i)->geometry().height();
 175     }
 176     */
 177 }
 178
 179 QList<QAction*> SystemMonitor::contextualActions()
 180 {
 181     QList<QAction*> result;
 182     foreach (Plasma::Applet *applet, m_applets) {
 183         result << applet->action("configure");
 184     }
 185     return result;
 186 }
 187
 188 QGraphicsWidget *SystemMonitor::graphicsWidget()
 189 {
 190     return m_widget;
 191 }
 192
 193 #include "system-monitor.moc"