TizenRefApp-8358 [Gallery] Implement ImageGrid item select logic

- Implemented item select logic in ImageGrid;
- Added Select Mode Startup feature into ImageGrid.

Change-Id: I638a73a2ce7bc1b19f8de5c23ba8e2e4a20f8b38

3 files changed, 84 insertions, 13 deletions

diff --git a/edc/image-grid.edc b/edc/image-grid.edc
index 81ce69d..ad03e26 100644
--- a/edc/image-grid.edc
+++ b/edc/image-grid.edc
@@ -211,6 +211,13 @@ group { "elm/layout/gallery_image_grid/linear";
          target: "image_mask_0";
          after: "transition_finished";
       }
+      program { "gallery,force,select,mode";
+         signal: "gallery,force,select,mode";
+         source: "";
+         action: STATE_SET "select_mode";
+         target: "spacer";
+         target: "image_mask_0";
+      }
       program { "gallery,disable,select,mode";
          signal: "gallery,disable,select,mode";
          source: "";
diff --git a/inc/view/ImageGrid.h b/inc/view/ImageGrid.h
index 712f827..d251b86 100644
--- a/inc/view/ImageGrid.h
+++ b/inc/view/ImageGrid.h
@@ -42,16 +42,19 @@ namespace gallery {
 			Builder();
 			Builder &setType(Type value);
 			Builder &setListener(IImageGridListener *value);
+			Builder &setSelectModeStartup(bool value);
 			ImageGridSRef build(Widget &parent) const;
 		private:
 			Type m_type;
 			IImageGridListener *m_listener;
+			bool m_selectModeStartup;
 		};
 
 		enum {
 			UF_LOSE_IMAGE = 1,
 			UF_LOSE_BG = 2,
-			UF_BLOCK_CLICKS = 4
+			UF_BLOCK_CLICKS = 4,
+			UF_SELECTED = 8
 		};
 
 		struct ItemParams {
@@ -101,7 +104,8 @@ namespace gallery {
 
 	private:
 		friend class ucl::RefCountObj<ImageGrid>;
-		ImageGrid(ucl::RefCountObjBase *rc, Type type, Evas_Object *scroller);
+		ImageGrid(ucl::RefCountObjBase *rc, Evas_Object *scroller,
+				Type type, bool selectModeStartup);
 		virtual ~ImageGrid();
 
 		static const Info &getInfo(Type type);
diff --git a/src/view/ImageGrid.cpp b/src/view/ImageGrid.cpp
index 0ef6216..da5b427 100644
--- a/src/view/ImageGrid.cpp
+++ b/src/view/ImageGrid.cpp
@@ -33,6 +33,11 @@ namespace gallery { namespace { namespace impl {
 	// Related to ImageGrid //
 	const TString SLOT_PART_FMT {"swallow.cell_%d"};
 
+	const TString SIGNAL_SELECT_ITEM_FMT {"gallery,select,%d"};
+	const TString SIGNAL_UNSELECT_ITEM_FMT {"gallery,unselect,%d"};
+
+	constexpr EdjeSignal SIGNAL_FORCE_SELECT_MODE
+			{"gallery,force,select,mode"};
 	constexpr EdjeSignal SIGNAL_ENABLE_SELECT_MODE
 			{"gallery,enable,select,mode"};
 	constexpr EdjeSignal SIGNAL_DISABLE_SELECT_MODE
@@ -42,7 +47,7 @@ namespace gallery { namespace { namespace impl {
 
 	// Related to Button //
 	constexpr ElmStyle ITEM_BTN_STYLE {"gallery_image"};
-	constexpr EdjePart PART_BTN_BG {"swallow.bg"};
+	constexpr EdjePart BTN_PART_BG {"swallow.bg"};
 	constexpr SmartEvent BTN_CLICKED {"clicked"};
 	constexpr EdjeSignal BTN_BLOCK_CLICKS {"gallery,block,clicks"};
 	constexpr EdjeSignal BTN_UNBLOCK_CLICKS {"gallery,unblock,clicks"};
@@ -59,7 +64,8 @@ namespace gallery {
 
 	ImageGrid::Builder::Builder() :
 		m_type(Type::HCOMB_3X3),
-		m_listener(nullptr)
+		m_listener(nullptr),
+		m_selectModeStartup(false)
 	{
 	}
 
@@ -76,6 +82,13 @@ namespace gallery {
 		return *this;
 	}
 
+	ImageGrid::Builder &ImageGrid::Builder::setSelectModeStartup(
+			const bool value)
+	{
+		m_selectModeStartup = value;
+		return *this;
+	}
+
 	ImageGridSRef ImageGrid::Builder::build(Widget &parent) const
 	{
 		Evas_Object *const scrollerEo = elm_scroller_add(parent);
@@ -84,7 +97,8 @@ namespace gallery {
 			return {};
 		}
 
-		auto result = makeShared<ImageGrid>(m_type, scrollerEo);
+		auto result = makeShared<ImageGrid>(scrollerEo,
+				m_type, m_selectModeStartup);
 
 		result->bindToEo();
 		result->setListener(m_listener);
@@ -211,7 +225,8 @@ namespace gallery {
 				m_realizeIndex(-1),
 				m_imageLoadSize(0),
 				m_wasUpdated(false),
-				m_isClicksBlocked(false)
+				m_isClicksBlocked(false),
+				m_isSelected(false)
 			{
 				m_btn.setFocusAlowed(false);
 				m_btn.setStyle(impl::ITEM_BTN_STYLE);
@@ -282,6 +297,18 @@ namespace gallery {
 				}
 			}
 
+			bool setSelected(const bool selected)
+			{
+				if (selected == m_isSelected) {
+					return false;
+				}
+				if (selected && !m_imageGrid.m_isInSelectMode) {
+					return false;
+				}
+				m_isSelected = selected;
+				return true;
+			}
+
 			bool update(const ItemParams &params)
 			{
 				if (!isRealized()) {
@@ -342,7 +369,7 @@ namespace gallery {
 							evas_object_image_filled_add(m_btn.getEvas()));
 					evas_object_image_load_size_set(*m_bgImage,
 							m_imageLoadSize, m_imageLoadSize);
-					m_btn.setContent(impl::PART_BTN_BG, *m_bgImage);
+					m_btn.setContent(impl::BTN_PART_BG, *m_bgImage);
 					show(*m_bgImage);
 				}
 
@@ -385,6 +412,7 @@ namespace gallery {
 			int m_imageLoadSize;
 			bool m_wasUpdated;
 			bool m_isClicksBlocked;
+			bool m_isSelected;
 		};
 
 	public:
@@ -393,9 +421,12 @@ namespace gallery {
 			m_layout(elm_layout_add(imageGrid.m_box), true),
 			m_isRealized(false)
 		{
-			if (isValid(m_info.slotThemes[isOdd]) &&
-					!m_layout.setTheme(m_info.slotThemes[isOdd])) {
-				ELOG("setTheme() failed!");
+			if (isValid(m_info.slotThemes[isOdd])) {
+				if (!m_layout.setTheme(m_info.slotThemes[isOdd])) {
+					ELOG("setTheme() failed!");
+				} else if (imageGrid.m_isInSelectMode) {
+					m_layout.emitSignal(impl::SIGNAL_FORCE_SELECT_MODE);
+				}
 			}
 			fill(m_layout);
 			show(m_layout);
@@ -455,8 +486,16 @@ namespace gallery {
 			}
 		}
 
+		void unselect()
+		{
+			for (UInt i = 0; i < m_items.size(); ++i) {
+				setSelected(i, false);
+			}
+		}
+
 		bool updateItem(const int itemOffset, const ItemParams &params)
 		{
+			setSelected(itemOffset, (params.flags & UF_SELECTED));
 			return m_items[itemOffset]->update(params);
 		}
 
@@ -466,6 +505,18 @@ namespace gallery {
 		}
 
 	private:
+		void setSelected(const int itemOffset, const bool selected)
+		{
+			if (!m_items[itemOffset]->setSelected(selected)) {
+				return;
+			}
+			const auto aSignal = EdjeSignal(selected ?
+					impl::SIGNAL_SELECT_ITEM_FMT.format(itemOffset) :
+					impl::SIGNAL_UNSELECT_ITEM_FMT.format(itemOffset));
+			m_layout.emitSignal(aSignal);
+		}
+
+	private:
 		const Info &m_info;
 		std::vector<SharedRef<Item>> m_items;
 		Layout m_layout;
@@ -487,8 +538,8 @@ namespace gallery {
 
 	// ImageGrid //
 
-	ImageGrid::ImageGrid(RefCountObjBase *const rc, const Type type,
-			Evas_Object *const scroller) :
+	ImageGrid::ImageGrid(RefCountObjBase *const rc, Evas_Object *const scroller,
+			const Type type, const bool selectModeStartup) :
 		Widget(rc, scroller, true),
 		m_info(getInfo(type)),
 
@@ -520,7 +571,7 @@ namespace gallery {
 		m_eventsLock(0),
 
 		m_animator(nullptr),
-		m_isInSelectMode(false),
+		m_isInSelectMode(selectModeStartup),
 		m_isRotaryActive(false)
 	{
 		prepare();
@@ -682,6 +733,10 @@ namespace gallery {
 		evas_object_freeze_events_set(*m_scroller, EINA_TRUE);
 		eext_rotary_object_event_activated_set(m_circleScroller, EINA_FALSE);
 
+		for (auto &slot: m_slots) {
+			slot->unselect();
+		}
+
 		const auto aSignal = (enabled ?
 				impl::SIGNAL_ENABLE_SELECT_MODE :
 				impl::SIGNAL_DISABLE_SELECT_MODE);
@@ -789,6 +844,9 @@ namespace gallery {
 
 	Result ImageGrid::updateItem(const int itemIndex, const ItemParams &params)
 	{
+		if (m_animator) {
+			LOG_RETURN(RES_ILLEGAL_STATE, "Transition is in progress.");
+		}
 		return doWithItem(itemIndex,
 			[&params](Slot &slot, const int itemOffset)
 			{
@@ -941,6 +999,8 @@ namespace gallery {
 
 			if (m_slotSize == 0) {
 				UCL_ASSERT(!isOdd, "Must be even!");
+				edje_object_message_signal_process(
+						elm_layout_edje_get(slot->getLayout()));
 				slot->getLayout().calculate();
 				setSlotSize(slot->getSize());
 			}