update// added new model derived from chatmodel and contactmodel, moved listchatdelegate to a seperated class file
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Strider
148
src/Chat/Helper/ChatDelegator.h
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148
src/Chat/Helper/ChatDelegator.h
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#ifndef CHATDELEGATOR_H
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#define CHATDELEGATOR_H
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#include <QString>
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#include <QStandardItemModel>
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#include <QAbstractItemDelegate>
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#include <QPainter>
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class ListViewDelegate : public QAbstractItemDelegate
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{
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int d_radius;
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int d_toppadding;
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int d_bottompadding;
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int d_leftpadding;
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int d_rightpadding;
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int d_verticalmargin;
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int d_horizontalmargin;
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int d_pointerwidth;
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int d_pointerheight;
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float d_widthfraction;
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public:
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inline ListViewDelegate(QObject *parent = nullptr);
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protected:
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inline void paint(QPainter *painter, QStyleOptionViewItem const &option, QModelIndex const &index) const;
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inline QSize sizeHint(QStyleOptionViewItem const &option, QModelIndex const &index) const;
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};
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inline ListViewDelegate::ListViewDelegate(QObject *parent): QAbstractItemDelegate(parent), d_radius(5), d_toppadding(5), d_bottompadding(3), d_leftpadding(5), d_rightpadding(5), d_verticalmargin(15), d_horizontalmargin(10), d_pointerwidth(10), d_pointerheight(17), d_widthfraction(.7)
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{
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}
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inline void ListViewDelegate::paint(QPainter *painter, QStyleOptionViewItem const &option, QModelIndex const &index) const
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{
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QTextDocument bodydoc;
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QTextOption textOption(bodydoc.defaultTextOption());
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textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
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bodydoc.setDefaultTextOption(textOption);
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bodydoc.setDefaultFont(QFont("Roboto", 12));
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QString bodytext(index.data(Qt::DisplayRole).toString());
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bodydoc.setHtml(bodytext);
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qreal contentswidth = option.rect.width() * d_widthfraction - d_horizontalmargin - d_pointerwidth - d_leftpadding - d_rightpadding;
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bodydoc.setTextWidth(contentswidth);
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qreal bodyheight = bodydoc.size().height();
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bool outgoing = index.data(Qt::UserRole + 1).toString() == "Outgoing";
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing);
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// uncomment to see the area provided to paint this item
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//painter->drawRect(option.rect);
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painter->translate(option.rect.left() + d_horizontalmargin, option.rect.top() + ((index.row() == 0) ? d_verticalmargin : 0));
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// background color for chat bubble
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QColor bgcolor("#535353");
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if (outgoing)
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bgcolor = "#eeeeee";
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// create chat bubble
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QPainterPath pointie;
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// left bottom
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pointie.moveTo(0, bodyheight + d_toppadding + d_bottompadding);
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// right bottom
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pointie.lineTo(0 + contentswidth + d_pointerwidth + d_leftpadding + d_rightpadding - d_radius,
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bodyheight + d_toppadding + d_bottompadding);
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pointie.arcTo(0 + contentswidth + d_pointerwidth + d_leftpadding + d_rightpadding - 2 * d_radius,
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bodyheight + d_toppadding + d_bottompadding - 2 * d_radius,
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2 * d_radius, 2 * d_radius, 270, 90);
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// right top
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pointie.lineTo(0 + contentswidth + d_pointerwidth + d_leftpadding + d_rightpadding, 0 + d_radius);
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pointie.arcTo(0 + contentswidth + d_pointerwidth + d_leftpadding + d_rightpadding - 2 * d_radius, 0,
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2 * d_radius, 2 * d_radius, 0, 90);
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// left top
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pointie.lineTo(0 + d_pointerwidth + d_radius, 0);
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pointie.arcTo(0 + d_pointerwidth, 0, 2 * d_radius, 2 * d_radius, 90, 90);
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// left bottom almost (here is the pointie)
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pointie.lineTo(0 + d_pointerwidth, bodyheight + d_toppadding + d_bottompadding - d_pointerheight);
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pointie.closeSubpath();
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// rotate bubble for outgoing messages
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if (outgoing)
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{
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painter->translate(option.rect.width() - pointie.boundingRect().width() - d_horizontalmargin - d_pointerwidth, 0);
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painter->translate(pointie.boundingRect().center());
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painter->rotate(180);
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painter->translate(-pointie.boundingRect().center());
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}
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// now paint it!
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painter->setPen(QPen(bgcolor));
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painter->drawPath(pointie);
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painter->fillPath(pointie, QBrush(bgcolor));
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// rotate back or painter is going to paint the text rotated...
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if (outgoing)
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{
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painter->translate(pointie.boundingRect().center());
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painter->rotate(-180);
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painter->translate(-pointie.boundingRect().center());
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}
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// set text color used to draw message body
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QAbstractTextDocumentLayout::PaintContext ctx;
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if (outgoing)
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ctx.palette.setColor(QPalette::Text, QColor("black"));
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else
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ctx.palette.setColor(QPalette::Text, QColor("white"));
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// draw body text
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painter->translate((outgoing ? 0 : d_pointerwidth) + d_leftpadding, 0);
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bodydoc.documentLayout()->draw(painter, ctx);
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painter->restore();
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}
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inline QSize ListViewDelegate::sizeHint(QStyleOptionViewItem const &option, QModelIndex const &index) const
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{
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QTextDocument bodydoc;
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QTextOption textOption(bodydoc.defaultTextOption());
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textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
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bodydoc.setDefaultTextOption(textOption);
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bodydoc.setDefaultFont(QFont("Roboto", 12));
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QString bodytext(index.data(Qt::DisplayRole).toString());
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bodydoc.setHtml(bodytext);
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// the width of the contents are the (a fraction of the window width) minus (margins + padding + width of the bubble's tail)
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qreal contentswidth = option.rect.width() * d_widthfraction - d_horizontalmargin - d_pointerwidth - d_leftpadding - d_rightpadding;
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// set this available width on the text document
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bodydoc.setTextWidth(contentswidth);
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QSize size(bodydoc.idealWidth() + d_horizontalmargin + d_pointerwidth + d_leftpadding + d_rightpadding,
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bodydoc.size().height() + d_bottompadding + d_toppadding + d_verticalmargin + 1); // I dont remember why +1, haha, might not be necessary
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if (index.row() == 0) // have extra margin at top of first item
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size += QSize(0, d_verticalmargin);
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return size;
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}
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#endif
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