db backend: mostly feature-complete

1 files changed, 76 insertions, 1 deletions

diff --git a/tagscene.cpp b/tagscene.cpp
index 5b028a0..fb52574 100644
--- a/tagscene.cpp
+++ b/tagscene.cpp
@@ -1,6 +1,81 @@
 #include "tagscene.h"
 
-TagScene::TagScene()
+#include <QGraphicsSceneMouseEvent>
+
+TagScene::TagScene(SQLiteSaveFile &proj)
+    : proj(proj)
+{
+    reloadPicture();
+    reloadTags();
+
+    connect(&proj, &SQLiteSaveFile::tagChange, this, &TagScene::tagChanged);
+    connect(&proj, &SQLiteSaveFile::fileReload,
+            [=]() { reloadTags(); });
+}
+
+void TagScene::tagChanged(TagChange change, const Tag &tag)
+{
+    TagItem *it;
+
+    switch(change)
+    {
+    case TagChange::CREATED:
+        addTag(tag);
+        break;
+
+    case TagChange::DELETED:
+        it = tags.take(tag.id);
+        assert(it);
+        removeItem(it);
+        break;
+
+    case TagChange::CHANGED:
+        it = tags[tag.id];
+        assert(it);
+
+        it->tagUpdated(tag);
+        break;
+    }
+}
+
+void TagScene::reloadPicture()
+{
+    pix.loadFromData(proj.getImage());
+    if (pix_it)
+        removeItem(pix_it);
+    pix_it = new QGraphicsPixmapItem(pix);
+    addItem(pix_it);
+}
+
+void TagScene::addTag(const Tag tag) {
+    TagItem *it = new TagItem(tag);
+    addItem(it);
+    tags[tag.id] = it;
+}
+
+void TagScene::reloadTags()
 {
+    clear();
+    for (auto *it : tags.values()) {
+        delete it;
+    }
+
+    for (const Tag &tag : proj.getAllTags()) {
+        addTag(tag);
+    }
+}
+
+void TagScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event)
+{
+    QGraphicsItem *it = itemAt(event->scenePos(), QTransform());
+    if (!it) {
+        QGraphicsScene::mouseDoubleClickEvent(event);
+    }
+
+    TagItem *tagitem = qgraphicsitem_cast<TagItem *>(it);
+    if (!tagitem) {
+        QGraphicsScene::mouseDoubleClickEvent(event);
+    }
 
+    tagDoubleClicked(tagitem->tag());
 }