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Basic model/view action works

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jaseg 2020-08-16 17:04:32 +02:00
parent 752f270cf8
commit 2deadc6cfb
15 changed files with 439 additions and 133 deletions
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67
tagitem.cpp
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@ -1,25 +1,86 @@
#include "tagitem.h"
#include <QPainter>
#include <QGuiApplication>
TagItem::TagItem(const Tag &tag)
: valid(true)
{
setFlags(QGraphicsItem::ItemIsMovable
| QGraphicsItem::ItemIsSelectable
| QGraphicsItem::ItemIsFocusable);
/* TODO text_it.setFlags(QGraphicsItem::ItemIgnoresTransformations);
*/
| QGraphicsItem::ItemIsFocusable
| QGraphicsItem::ItemIgnoresTransformations
| QGraphicsItem::ItemSendsGeometryChanges);
QFont font(QGuiApplication::font());
font.setPointSize(18);
setFont(font);
tagUpdated(tag);
}
void TagItem::tagUpdated(const Tag &tag)
{
m_tag = tag;
qDebug() << "TagItem updated" << tag.name << tag.anchor;
setText(tag.name);
setPos(tag.anchor);
}
QRectF TagItem::boundingRect() const
{
QRectF parentRect(QGraphicsSimpleTextItem::boundingRect());
parentRect.translate(-(parentRect.bottomRight() - parentRect.topLeft()) * 0.5);
return parentRect.marginsAdded(QMargins(5, 5, 5, 5));
}
/* For some reason this is not exposed through the public API so we have to copy-paste it here m( */
static void paintSelectionHighlightBorder(QPainter *painter, const QStyleOptionGraphicsItem *option, TagItem *item)
{
const QRectF mbrect = painter->transform().mapRect(item->boundingRect());
if (qMin(mbrect.width(), mbrect.height()) < qreal(1.0))
return;
const qreal pad = item->pen().widthF() / 2;
const qreal penWidth = 0; // cosmetic pen
const QColor fgcolor = option->palette.windowText().color();
const QColor bgcolor( // ensure good contrast against fgcolor
fgcolor.red() > 127 ? 0 : 255,
fgcolor.green() > 127 ? 0 : 255,
fgcolor.blue() > 127 ? 0 : 255);
painter->setPen(QPen(bgcolor, penWidth, Qt::SolidLine));
painter->setBrush(Qt::NoBrush);
painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
painter->setPen(QPen(option->palette.windowText(), 0, Qt::DashLine));
painter->setBrush(Qt::NoBrush);
painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
}
void TagItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
painter->setBrush(Qt::white);
painter->drawRect(boundingRect());
QRectF parentRect(QGraphicsSimpleTextItem::boundingRect());
QPointF pos = (parentRect.bottomRight() - parentRect.topLeft()) * 0.5;
painter->translate(-pos);
QStyleOptionGraphicsItem newOption(*option);
newOption.state = ~(QStyle::State_Selected |QStyle::State_HasFocus);
QGraphicsSimpleTextItem::paint(painter, &newOption, widget);
painter->translate(pos);
if (option->state & (QStyle::State_Selected | QStyle::State_HasFocus))
paintSelectionHighlightBorder(painter, option, this);
}
QPainterPath TagItem::shape() const
{
QPainterPath path;
return QGraphicsItem::shape();
}
QVariant TagItem::itemChange(QGraphicsItem::GraphicsItemChange change, const QVariant &value)
{
qDebug() << "itemChange" << m_tag.name << this->boundingRect() << change;
if (change == ItemPositionChange) {
/* https://gist.github.com/csukuangfj/c2a06416062bec9ed99eddd705c21275#file-qgraphicsscenetest-cpp-L90
*