From aedebaf2dbb371c68fcebc75afd92a787299e1b4 Mon Sep 17 00:00:00 2001
From: Craig Watson <craig@watsons.ch>
Date: Sun, 29 Jan 2017 18:35:06 -0500
Subject: [PATCH] Add "set as background" to frame menu for images

Images (UBGraphicsPixmapitem and UBGraphicsSvgItem) can be set as
background via the menu on their frame. Currently, the image is first
centered and un-transformed before being set as background.

The option in the frame appears for any UBGraphicsItem for which
`data(UBGraphicsItemData::ItemCanBeSetAsBackground)` is true.

This is (currently) only enabled for image items.
---
 src/core/UB.h                         |  1 +
 src/domain/UBGraphicsItemDelegate.cpp | 17 +++++++++++++++++
 src/domain/UBGraphicsItemDelegate.h   |  2 ++
 src/domain/UBGraphicsPixmapItem.cpp   |  2 ++
 src/domain/UBGraphicsSvgItem.cpp      |  2 ++
 5 files changed, 24 insertions(+)

diff --git a/src/core/UB.h b/src/core/UB.h
index bb197d95..0b9e285c 100644
--- a/src/core/UB.h
+++ b/src/core/UB.h
@@ -137,6 +137,7 @@ struct UBGraphicsItemData
         //Duplicating delegate's functions to make possible working with pure QGraphicsItem
         , ItemFlippable // (bool)
         , ItemRotatable // (bool)
+        , ItemCanBeSetAsBackground
     };
 };
 
diff --git a/src/domain/UBGraphicsItemDelegate.cpp b/src/domain/UBGraphicsItemDelegate.cpp
index f7f76f5c..c21b9bd1 100644
--- a/src/domain/UBGraphicsItemDelegate.cpp
+++ b/src/domain/UBGraphicsItemDelegate.cpp
@@ -596,6 +596,18 @@ void UBGraphicsItemDelegate::showHide(bool show)
     emit showOnDisplayChanged(show);
 }
 
+void UBGraphicsItemDelegate::setAsBackground()
+{
+    UBGraphicsScene* scene = castUBGraphicsScene();
+    QGraphicsItem* item = delegated();
+
+    if (scene && item) {
+        item->resetTransform();
+        item->setPos(item->sceneBoundingRect().width()/-2., item->sceneBoundingRect().height()/-2.);
+
+        scene->setAsBackgroundObject(item);
+    }
+}
 
 void UBGraphicsItemDelegate::gotoContentSource()
 {
@@ -681,6 +693,11 @@ void UBGraphicsItemDelegate::decorateMenu(QMenu* menu)
     showIcon.addPixmap(QPixmap(":/images/eyeClosed.svg"), QIcon::Normal, QIcon::Off);
     mShowOnDisplayAction->setIcon(showIcon);
 
+    if (delegated()->data(UBGraphicsItemData::ItemCanBeSetAsBackground).toBool()) {
+        mSetAsBackgroundAction = mMenu->addAction(tr("Set as background"), this, SLOT(setAsBackground()));
+        mSetAsBackgroundAction->setCheckable(false);
+    }
+
     if (testUBFlags(GF_SHOW_CONTENT_SOURCE))
     {
         mGotoContentSourceAction = menu->addAction(tr("Go to Content Source"), this, SLOT(gotoContentSource()));
diff --git a/src/domain/UBGraphicsItemDelegate.h b/src/domain/UBGraphicsItemDelegate.h
index ef9f1e0f..ad249dc1 100644
--- a/src/domain/UBGraphicsItemDelegate.h
+++ b/src/domain/UBGraphicsItemDelegate.h
@@ -343,6 +343,7 @@ class UBGraphicsItemDelegate : public QObject
 
         QAction* mLockAction;
         QAction* mShowOnDisplayAction;
+        QAction* mSetAsBackgroundAction;
         QAction* mGotoContentSourceAction;
 
         UBGraphicsDelegateFrame* mFrame;
@@ -354,6 +355,7 @@ class UBGraphicsItemDelegate : public QObject
         UBGraphicsToolBarItem* mToolBarItem;
 
 protected slots:
+        virtual void setAsBackground();
         virtual void gotoContentSource();
 
 private:
diff --git a/src/domain/UBGraphicsPixmapItem.cpp b/src/domain/UBGraphicsPixmapItem.cpp
index 6a5e6072..b5dacc78 100644
--- a/src/domain/UBGraphicsPixmapItem.cpp
+++ b/src/domain/UBGraphicsPixmapItem.cpp
@@ -61,6 +61,8 @@ UBGraphicsPixmapItem::UBGraphicsPixmapItem(QGraphicsItem* parent)
     setData(UBGraphicsItemData::itemLayerType, QVariant(itemLayerType::ObjectItem)); //Necessary to set if we want z value to be assigned correctly
     setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
 
+    setData(UBGraphicsItemData::ItemCanBeSetAsBackground, true);
+
     setUuid(QUuid::createUuid()); //more logical solution is in creating uuid for element in element's constructor
 }
 
diff --git a/src/domain/UBGraphicsSvgItem.cpp b/src/domain/UBGraphicsSvgItem.cpp
index 81f81333..90c188ab 100644
--- a/src/domain/UBGraphicsSvgItem.cpp
+++ b/src/domain/UBGraphicsSvgItem.cpp
@@ -87,6 +87,8 @@ void UBGraphicsSvgItem::init()
 
     setData(UBGraphicsItemData::itemLayerType, QVariant(itemLayerType::ObjectItem)); //Necessary to set if we want z value to be assigned correctly
 
+    setData(UBGraphicsItemData::ItemCanBeSetAsBackground, true);
+
     setUuid(QUuid::createUuid());
 }