Add pressed inventory slot background image

doc/lua_api.txt

@@ -2913,6 +2913,7 @@ Some types may inherit styles from parent types.
     * spacing - 2d vector, sets the space between inventory slots in coordinates.
     * bgimg - slot background image. Defaults to none.
     * bgimg_hovered - hovered slot background image.
+    * bgimg_pressed - pressed slot background image.
     * bgimg_middle - Makes the bgimg textures render in 9-sliced mode and defines the middle rect.
 * image_button (additional properties)
     * fgimg - standard image. Defaults to none.

src/gui/guiFormSpecMenu.cpp

@@ -540,12 +540,13 @@ void GUIFormSpecMenu::parseList(parserData *data, const std::string &element)
 
 		video::ITexture *bgimg = style.getTexture(StyleSpec::BGIMG, m_tsrc, nullptr);
 		video::ITexture *bgimg_hovered = style.getTexture(StyleSpec::BGIMG_HOVERED, m_tsrc, nullptr);
+		video::ITexture *bgimg_pressed = style.getTexture(StyleSpec::BGIMG_PRESSED, m_tsrc, nullptr);
 		core::rect<s32> bgimg_middle = style.getRect(StyleSpec::BGIMG_MIDDLE, core::rect<s32>());
 
 		GUIInventoryList *e = new GUIInventoryList(Environment, data->current_parent,
 				spec.fid, rect, m_invmgr, loc, listname, geom, start_i,
 				v2s32(slot_size.X, slot_size.Y), slot_spacing, bgimg, bgimg_hovered,
-				bgimg_middle, this, data->inventorylist_options, m_font);
+				bgimg_pressed, bgimg_middle, this, data->inventorylist_options, m_font);
 
 		e->setNotClipped(style.getBool(StyleSpec::NOCLIP, false));
 

src/gui/guiInventoryList.cpp

@@ -36,6 +36,7 @@ GUIInventoryList::GUIInventoryList(gui::IGUIEnvironment *env,
 	const v2f32 &slot_spacing,
 	video::ITexture* slotbg_n_texture,
 	video::ITexture* slotbg_h_texture,
+	video::ITexture* slotbg_p_texture,
 	const core::rect<s32> &slotbg_middle,
 	GUIFormSpecMenu *fs_menu,
 	const Options &options,
@@ -50,11 +51,13 @@ GUIInventoryList::GUIInventoryList(gui::IGUIEnvironment *env,
 	m_slot_spacing(slot_spacing),
 	m_slotbg_n_texture(slotbg_n_texture),
 	m_slotbg_h_texture(slotbg_h_texture),
+	m_slotbg_p_texture(slotbg_p_texture),
 	m_slotbg_middle(slotbg_middle),
 	m_fs_menu(fs_menu),
 	m_options(options),
 	m_font(font),
 	m_hovered_i(-1),
+	m_pressed(false),
 	m_already_warned(false)
 {
 }
@@ -118,8 +121,12 @@ void GUIInventoryList::draw()
 		// layer 0
 		if (m_slotbg_n_texture) {
 			video::ITexture *texture = m_slotbg_n_texture;
-			if (hovering && m_slotbg_h_texture)
+			if (hovering) {
-				texture = m_slotbg_h_texture;
+				if (m_pressed && m_slotbg_p_texture)
+					texture = m_slotbg_p_texture;
+				else if (m_slotbg_h_texture)
+					texture = m_slotbg_h_texture;
+			}
 
 			core::rect<s32> srcrect(core::position2d<s32>(0, 0),
 									core::dimension2di(texture->getOriginalSize()));
@@ -198,8 +205,15 @@ bool GUIInventoryList::OnEvent(const SEvent &event)
 
 	m_hovered_i = getItemIndexAtPos(v2s32(event.MouseInput.X, event.MouseInput.Y));
 
-	if (m_hovered_i != -1)
+	if (m_hovered_i != -1) {
+		if (event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)
+			m_pressed = true;
+		else if (event.MouseInput.Event == EMIE_LMOUSE_LEFT_UP)
+			m_pressed = false;
 		return IGUIElement::OnEvent(event);
+	}
+
+	m_pressed = false;
 
 	// no item slot at pos of mouse event => allow clicking through
 	// find the element that would be hovered if this inventorylist was invisible

src/gui/guiInventoryList.h

@@ -71,6 +71,7 @@ public:
 		const v2f32 &slot_spacing,
 		video::ITexture* slotbg_n_texture,
 		video::ITexture* slotbg_h_texture,
+		video::ITexture* slotbg_p_texture,
 		const core::rect<s32> &slotbg_middle,
 		GUIFormSpecMenu *fs_menu,
 		const Options &options,
@@ -123,6 +124,7 @@ private:
 	// Slot textures
 	video::ITexture* m_slotbg_n_texture;
 	video::ITexture* m_slotbg_h_texture;
+	video::ITexture* m_slotbg_p_texture;
 	core::rect<s32> m_slotbg_middle;
 
 	// the GUIFormSpecMenu can have an item selected and co.
@@ -136,6 +138,9 @@ private:
 	// the index of the hovered item; -1 if no item is hovered
 	s32 m_hovered_i;
 
+	// Whether the hovered item is being pressed
+	bool m_pressed;
+
 	// we do not want to write a warning on every draw
 	bool m_already_warned;
 };