Some basic message painting

ui/utils/feedview.cpp

@@ -232,3 +232,8 @@ void FeedView::verticalScrollbarValueChanged(int value)
     
     QAbstractItemView::verticalScrollbarValueChanged(vo);
 }
+
+QFont FeedView::getFont() const
+{
+    return viewOptions().font;
+}

ui/utils/feedview.h

@@ -43,6 +43,8 @@ public:
     void setSelection(const QRect & rect, QItemSelectionModel::SelectionFlags command) override;
     QRegion visualRegionForSelection(const QItemSelection & selection) const override;
     
+    QFont getFont() const;
+    
 protected slots:
     void rowsInserted(const QModelIndex & parent, int start, int end) override;
     void verticalScrollbarValueChanged(int value) override;

ui/utils/messagedelegate.cpp

@@ -0,0 +1,130 @@
+/*
+ * Squawk messenger. 
+ * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <QPainter>
+#include <QApplication>
+#include "messagedelegate.h"
+#include "ui/models/messagefeed.h"
+
+constexpr int avatarHeight = 50;
+constexpr int margin = 6;
+
+MessageDelegate::MessageDelegate(QObject* parent):
+QStyledItemDelegate(parent),
+bodyFont(),
+nickFont(),
+dateFont(),
+bodyMetrics(bodyFont),
+nickMetrics(nickFont),
+dateMetrics(dateFont)
+{
+}
+
+MessageDelegate::~MessageDelegate()
+{
+}
+
+void MessageDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
+{
+    bool sentByMe = false;
+    QVariant sbm = index.data(Models::MessageFeed::SentByMe);
+    if (sbm.isValid()) {
+        sentByMe = sbm.toBool();
+    }
+    painter->save();
+    painter->setRenderHint(QPainter::Antialiasing, true);
+    QIcon icon(index.data(Models::MessageFeed::Avatar).toString());
+    
+    if (sentByMe) {
+        painter->drawPixmap(option.rect.width() - avatarHeight - margin,  option.rect.y() + margin / 2, icon.pixmap(avatarHeight, avatarHeight));
+    } else {
+        painter->drawPixmap(margin, option.rect.y() + margin / 2, icon.pixmap(avatarHeight, avatarHeight));
+    }
+    
+    QStyleOptionViewItem opt = option;
+    QRect messageRect = option.rect.adjusted(margin, margin / 2, -(avatarHeight + 2 * margin), -margin / 2);
+    if (!sentByMe) {
+        opt.displayAlignment = Qt::AlignLeft | Qt::AlignTop;
+        messageRect.adjust(avatarHeight + margin, 0, avatarHeight + margin, 0);
+    } else {
+        opt.displayAlignment = Qt::AlignRight | Qt::AlignTop;
+    }
+    opt.rect = messageRect;
+    
+    QRect rect;
+    painter->setFont(nickFont);
+    painter->drawText(opt.rect, opt.displayAlignment, index.data(Models::MessageFeed::Sender).toString(), &rect);
+    
+    opt.rect.adjust(0, rect.height(), 0, 0);
+    painter->setFont(bodyFont);
+    painter->drawText(opt.rect, opt.displayAlignment | Qt::TextWordWrap, index.data(Models::MessageFeed::Text).toString(), &rect);
+    
+    opt.rect.adjust(0, rect.height(), 0, 0);
+    painter->setFont(dateFont);
+    QColor q = painter->pen().color();
+    q.setAlpha(180);
+    painter->setPen(q);
+    painter->drawText(opt.rect, opt.displayAlignment, index.data(Models::MessageFeed::Date).toDateTime().toLocalTime().toString(), &rect);
+    
+    painter->restore();
+}
+
+QSize MessageDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
+{
+    QRect messageRect = option.rect.adjusted(0, margin / 2, -(avatarHeight + 3 * margin), -margin);
+    QStyleOptionViewItem opt = option;
+    opt.rect = messageRect;
+    QSize messageSize = bodyMetrics.boundingRect(messageRect, Qt::TextWordWrap, index.data(Models::MessageFeed::Text).toString()).size();
+    
+    messageSize.rheight() += nickMetrics.lineSpacing();
+    messageSize.rheight() += dateMetrics.height();
+    
+    if (messageSize.height() < avatarHeight) {
+        messageSize.setHeight(avatarHeight);
+    }
+    
+    messageSize.rheight() += margin;
+    
+    return messageSize;
+}
+
+void MessageDelegate::initializeFonts(const QFont& font)
+{
+    bodyFont = font;
+    nickFont = font;
+    dateFont = font;
+    
+    nickFont.setBold(true);
+    dateFont.setItalic(true);
+    float dps = dateFont.pointSizeF();
+    if (dps != -1) {
+        dateFont.setPointSizeF(dps * 0.7);
+    } else {
+        dateFont.setPointSize(dateFont.pointSize() - 2);
+    }
+    
+    bodyMetrics = QFontMetrics(bodyFont);
+    nickMetrics = QFontMetrics(nickFont);
+    dateMetrics = QFontMetrics(dateFont);
+}
+
+
+// void MessageDelegate::setModelData(QWidget* editor, QAbstractItemModel* model, const QModelIndex& index) const
+// {
+//     
+// }

ui/utils/messagedelegate.h

@@ -0,0 +1,50 @@
+/*
+ * Squawk messenger. 
+ * Copyright (C) 2019  Yury Gubich <blue@macaw.me>
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef MESSAGEDELEGATE_H
+#define MESSAGEDELEGATE_H
+
+#include <QStyledItemDelegate>
+#include <QFont>
+#include <QFontMetrics>
+
+#include "shared/icons.h"
+
+class MessageDelegate : public QStyledItemDelegate
+{
+    Q_OBJECT
+public:
+    MessageDelegate(QObject *parent = nullptr);
+    ~MessageDelegate();
+    
+    void paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const override;
+    QSize sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const override;
+    //void setModelData(QWidget * editor, QAbstractItemModel * model, const QModelIndex & index) const override;
+    
+    void initializeFonts(const QFont& font);
+    
+private:
+    QFont bodyFont;
+    QFont nickFont;
+    QFont dateFont;
+    QFontMetrics bodyMetrics;
+    QFontMetrics nickMetrics;
+    QFontMetrics dateMetrics;
+};
+
+#endif // MESSAGEDELEGATE_H