tools/chatgui: Qt5 GUI chat app stub with tray, channel list, message bubbles

tools/chatgui/src/channeldelegate.cpp

@@ -0,0 +1,74 @@
+#include "channeldelegate.h"
+#include <QPainter>
+#include <QApplication>
+
+ChannelDelegate::ChannelDelegate(QObject *parent)
+    : QStyledItemDelegate(parent) {}
+
+void ChannelDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
+                            const QModelIndex &index) const {
+    painter->save();
+
+    if (option.state & QStyle::State_Selected) {
+        painter->fillRect(option.rect, option.palette.highlight());
+    } else if (option.state & QStyle::State_MouseOver) {
+        painter->fillRect(option.rect, option.palette.light());
+    }
+
+    const int margin = 8;
+    const int iconSize = 32;
+    QRect iconRect(option.rect.left() + margin,
+                   option.rect.top() + (option.rect.height() - iconSize) / 2,
+                   iconSize, iconSize);
+
+    QIcon icon = qvariant_cast<QIcon>(index.data(ChannelIconRole));
+    if (!icon.isNull()) {
+        icon.paint(painter, iconRect);
+    }
+
+    QRect textRect(iconRect.right() + margin, option.rect.top() + margin,
+                   option.rect.right() - iconRect.right() - 2 * margin,
+                   option.rect.height() - 2 * margin);
+
+    QString name = index.data(ChannelNameRole).toString();
+    QFont nameFont = option.font;
+    nameFont.setBold(true);
+    nameFont.setPointSize(nameFont.pointSize() + 1);
+    painter->setFont(nameFont);
+
+    QColor textColor = (option.state & QStyle::State_Selected)
+                       ? option.palette.highlightedText().color()
+                       : option.palette.text().color();
+    painter->setPen(textColor);
+
+    QRect nameRect = textRect;
+    nameRect.setHeight(QFontMetrics(nameFont).height());
+    painter->drawText(nameRect, Qt::AlignLeft | Qt::AlignTop,
+                      painter->fontMetrics().elidedText(name, Qt::ElideRight, nameRect.width()));
+
+    QString lastMsg = index.data(ChannelLastMessageRole).toString();
+    if (!lastMsg.isEmpty()) {
+        QFont msgFont = option.font;
+        msgFont.setPointSize(msgFont.pointSize() - 1);
+        painter->setFont(msgFont);
+
+        QColor msgColor = (option.state & QStyle::State_Selected)
+                          ? option.palette.highlightedText().color().darker(120)
+                          : QColor(128, 128, 128);
+        painter->setPen(msgColor);
+
+        QRect msgRect(textRect.left(), nameRect.bottom() + 4,
+                      textRect.width(), option.rect.bottom() - nameRect.bottom() - margin);
+        QString elidedMsg = painter->fontMetrics().elidedText(lastMsg, Qt::ElideRight, msgRect.width());
+        painter->drawText(msgRect, Qt::AlignLeft | Qt::AlignTop | Qt::TextWordWrap, elidedMsg);
+    }
+
+    painter->restore();
+}
+
+QSize ChannelDelegate::sizeHint(const QStyleOptionViewItem &option,
+                                const QModelIndex &index) const {
+    Q_UNUSED(option);
+    Q_UNUSED(index);
+    return QSize(200, 56);
+}