From 2deadc6cfbf71e06908963fb1bae628cfe370f9d Mon Sep 17 00:00:00 2001
From: jaseg <git-bigdata-wsl-arch@jaseg.de>
Date: Sun, 16 Aug 2020 17:04:32 +0200
Subject: Basic model/view action works

---
 tagitem.cpp | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 64 insertions(+), 3 deletions(-)

(limited to 'tagitem.cpp')

diff --git a/tagitem.cpp b/tagitem.cpp
index d251428..e493b81 100644
--- a/tagitem.cpp
+++ b/tagitem.cpp
@@ -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
          *
-- 
cgit