Add invitation action to desktop member rows

tools/chatgui/src/accountdelegate.cpp

@@ -3,6 +3,11 @@
 #include "memberlistmodel.h"
 #include <QPainter>
 #include <QFont>
+#include <QMouseEvent>
+
+static QRect inviteButtonRect(const QRect& row) {
+    return QRect(row.right() - 31, row.center().y() - 14, 28, 28);
+}
 
 AccountDelegate::AccountDelegate(QObject *parent)
     : QStyledItemDelegate(parent) {}
@@ -26,7 +31,8 @@ void AccountDelegate::paint(QPainter *painter, const QStyleOptionViewItem &optio
         icon.paint(painter, option.rect.left() + margin, option.rect.top() + (option.rect.height() - iconSz) / 2, iconSz, iconSz);
 
     const int x = option.rect.left() + iconSz + margin * 3;
-    const int w = option.rect.right() - x - margin;
+    const bool canInvite = !index.data(Qt::UserRole + 2).toBool();
+    const int w = option.rect.right() - x - margin - (canInvite ? 32 : 0);
     const int yMid = option.rect.top() + option.rect.height() / 2;
 
     uint8_t flags = (uint8_t)(index.data(Qt::UserRole + 3).toInt() & 0xFF);
@@ -69,9 +75,32 @@ void AccountDelegate::paint(QPainter *painter, const QStyleOptionViewItem &optio
         painter->drawText(QRect(flagX, yMid + 2, w - (flagX - x), option.rect.bottom() - yMid - 2),
                           Qt::AlignLeft | Qt::AlignTop, sub);
 
+    if (canInvite) {
+        QFont plusFont = nameFont; plusFont.setPixelSize(22); plusFont.setStrikeOut(false);
+        painter->setFont(plusFont);
+        painter->setPen(option.palette.color(QPalette::Link));
+        painter->drawText(inviteButtonRect(option.rect), Qt::AlignCenter, QStringLiteral("+"));
+    }
     painter->restore();
 }
 
+bool AccountDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option,
+                                  const QModelIndex& index) {
+    Q_UNUSED(model);
+    if (index.data(Qt::UserRole + 2).toBool()) return false;
+    if (event->type() != QEvent::MouseButtonPress && event->type() != QEvent::MouseButtonRelease &&
+        event->type() != QEvent::MouseButtonDblClick) return false;
+    auto* mouse = static_cast<QMouseEvent*>(event);
+    if (mouse->button() != Qt::LeftButton) return false;
+    const bool inside = inviteButtonRect(option.rect).contains(mouse->pos());
+    if (event->type() == QEvent::MouseButtonPress) { m_invitePress = inside ? index : QModelIndex(); return inside; }
+    if (event->type() == QEvent::MouseButtonDblClick) return inside;
+    const bool activate = inside && m_invitePress == index;
+    m_invitePress = QPersistentModelIndex();
+    if (activate) emit inviteRequested(index);
+    return activate;
+}
+
 QSize AccountDelegate::sizeHint(const QStyleOptionViewItem &option,
                                  const QModelIndex &index) const {
     (void)option; (void)index;