Merge pull request #521 from laanwj/qt

Qt GUI

1 files changed, 224 insertions, 0 deletions

diff --git a/src/qt/notificator.cpp b/src/qt/notificator.cpp
new file mode 100644
index 0000000000..86ccfc8541
--- /dev/null
+++ b/src/qt/notificator.cpp
@@ -0,0 +1,224 @@
+#include "notificator.h"
+
+#include <QMetaType>
+#include <QVariant>
+#include <QIcon>
+#include <QApplication>
+#include <QStyle>
+#include <QByteArray>
+#include <QSystemTrayIcon>
+#include <QMessageBox>
+
+#ifdef QT_DBUS
+#include <QtDBus/QtDBus>
+#include <stdint.h>
+#endif
+
+// https://wiki.ubuntu.com/NotificationDevelopmentGuidelines recommends at least 128
+const int FREEDESKTOP_NOTIFICATION_ICON_SIZE = 128;
+
+Notificator::Notificator(const QString &programName, QSystemTrayIcon *trayicon, QWidget *parent):
+    QObject(parent),
+    parent(parent),
+    programName(programName),
+    mode(None),
+    trayIcon(trayicon)
+#ifdef QT_DBUS
+    ,interface(0)
+#endif
+{
+    if(trayicon && trayicon->supportsMessages())
+    {
+        mode = QSystemTray;
+    }
+#ifdef QT_DBUS
+    interface = new QDBusInterface("org.freedesktop.Notifications",
+          "/org/freedesktop/Notifications", "org.freedesktop.Notifications");
+    if(interface->isValid())
+    {
+        mode = Freedesktop;
+    }
+#endif
+}
+
+Notificator::~Notificator()
+{
+#ifdef QT_DBUS
+    delete interface;
+#endif
+}
+
+#ifdef QT_DBUS
+
+// Loosely based on http://www.qtcentre.org/archive/index.php/t-25879.html
+class FreedesktopImage
+{
+public:
+    FreedesktopImage() {}
+    FreedesktopImage(const QImage &img);
+
+    static int metaType();
+
+    // Image to variant that can be marshaled over DBus
+    static QVariant toVariant(const QImage &img);
+
+private:
+    int width, height, stride;
+    bool hasAlpha;
+    int channels;
+    int bitsPerSample;
+    QByteArray image;
+
+    friend QDBusArgument &operator<<(QDBusArgument &a, const FreedesktopImage &i);
+    friend const QDBusArgument &operator>>(const QDBusArgument &a, FreedesktopImage &i);
+};
+
+Q_DECLARE_METATYPE(FreedesktopImage);
+
+// Image configuration settings
+const int CHANNELS = 4;
+const int BYTES_PER_PIXEL = 4;
+const int BITS_PER_SAMPLE = 8;
+
+FreedesktopImage::FreedesktopImage(const QImage &img):
+    width(img.width()),
+    height(img.height()),
+    stride(img.width() * BYTES_PER_PIXEL),
+    hasAlpha(true),
+    channels(CHANNELS),
+    bitsPerSample(BITS_PER_SAMPLE)
+{
+    // Convert 00xAARRGGBB to RGBA bytewise (endian-independent) format
+    QImage tmp = img.convertToFormat(QImage::Format_ARGB32);
+    const uint32_t *data = reinterpret_cast<const uint32_t*>(tmp.constBits());
+
+    unsigned int num_pixels = width * height;
+    image.resize(num_pixels * BYTES_PER_PIXEL);
+
+    for(unsigned int ptr = 0; ptr < num_pixels; ++ptr)
+    {
+        image[ptr*BYTES_PER_PIXEL+0] = data[ptr] >> 16; // R
+        image[ptr*BYTES_PER_PIXEL+1] = data[ptr] >> 8;  // G
+        image[ptr*BYTES_PER_PIXEL+2] = data[ptr];       // B
+        image[ptr*BYTES_PER_PIXEL+3] = data[ptr] >> 24; // A
+    }
+}
+
+QDBusArgument &operator<<(QDBusArgument &a, const FreedesktopImage &i)
+{
+    a.beginStructure();
+    a << i.width << i.height << i.stride << i.hasAlpha << i.bitsPerSample << i.channels << i.image;
+    a.endStructure();
+    return a;
+}
+
+const QDBusArgument &operator>>(const QDBusArgument &a, FreedesktopImage &i)
+{
+    a.beginStructure();
+    a >> i.width >> i.height >> i.stride >> i.hasAlpha >> i.bitsPerSample >> i.channels >> i.image;
+    a.endStructure();
+    return a;
+}
+
+int FreedesktopImage::metaType()
+{
+    return qDBusRegisterMetaType<FreedesktopImage>();
+}
+
+QVariant FreedesktopImage::toVariant(const QImage &img)
+{
+    FreedesktopImage fimg(img);
+    return QVariant(FreedesktopImage::metaType(), &fimg);
+}
+
+void Notificator::notifyDBus(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
+{
+    Q_UNUSED(cls);
+    // Arguments for DBus call:
+    QList<QVariant> args;
+
+    // Program Name:
+    args.append(programName);
+
+    // Unique ID of this notification type:
+    args.append(0U);
+
+    // Application Icon, empty string
+    args.append(QString());
+
+    // Summary
+    args.append(title);
+
+    // Body
+    args.append(text);
+
+    // Actions (none, actions are deprecated)
+    QStringList actions;
+    args.append(actions);
+
+    // Hints
+    QVariantMap hints;
+
+    // If no icon specified, set icon based on class
+    QIcon tmpicon;
+    if(icon.isNull())
+    {
+        QStyle::StandardPixmap sicon = QStyle::SP_MessageBoxQuestion;
+        switch(cls)
+        {
+        case Information: sicon = QStyle::SP_MessageBoxInformation; break;
+        case Warning: sicon = QStyle::SP_MessageBoxWarning; break;
+        case Critical: sicon = QStyle::SP_MessageBoxCritical; break;
+        default: break;
+        }
+        tmpicon = QApplication::style()->standardIcon(sicon);
+    }
+    else
+    {
+        tmpicon = icon;
+    }
+    hints["icon_data"] = FreedesktopImage::toVariant(tmpicon.pixmap(FREEDESKTOP_NOTIFICATION_ICON_SIZE).toImage());
+    args.append(hints);
+
+    // Timeout (in msec)
+    args.append(millisTimeout);
+
+    // "Fire and forget"
+    interface->callWithArgumentList(QDBus::NoBlock, "Notify", args);
+}
+#endif
+
+void Notificator::notifySystray(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
+{
+    Q_UNUSED(icon);
+    QSystemTrayIcon::MessageIcon sicon = QSystemTrayIcon::NoIcon;
+    switch(cls) // Set icon based on class
+    {
+    case Information: sicon = QSystemTrayIcon::Information; break;
+    case Warning: sicon = QSystemTrayIcon::Warning; break;
+    case Critical: sicon = QSystemTrayIcon::Critical; break;
+    }
+    trayIcon->showMessage(title, text, sicon, millisTimeout);
+}
+
+void Notificator::notify(Class cls, const QString &title, const QString &text, const QIcon &icon, int millisTimeout)
+{
+    switch(mode)
+    {
+#ifdef QT_DBUS
+    case Freedesktop:
+        notifyDBus(cls, title, text, icon, millisTimeout);
+        break;
+#endif
+    case QSystemTray:
+        notifySystray(cls, title, text, icon, millisTimeout);
+        break;
+    default:
+        if(cls == Critical)
+        {
+            // Fall back to old fashioned popup dialog if critical and no other notification available
+            QMessageBox::critical(parent, title, text, QMessageBox::Ok, QMessageBox::Ok);
+        }
+        break;
+    }
+}