TouchScreenGUI: Fix only 9 hotbar slots being usable (#13698)

Co-authored-by: Muhammad Rifqi Priyo Susanto <muhammadrifqipriyosusanto@gmail.com>

src/client/game.cpp

@@ -2168,6 +2168,14 @@ void Game::processItemSelection(u16 *new_playeritem)
 		}
 	}
 
+#ifdef HAVE_TOUCHSCREENGUI
+	if (g_touchscreengui) {
+		std::optional<u16> selection = g_touchscreengui->getHotbarSelection();
+		if (selection)
+			*new_playeritem = *selection;
+	}
+#endif
+
 	// Clamp selection again in case it wasn't changed but max_item was
 	*new_playeritem = MYMIN(*new_playeritem, max_item);
 }

src/client/hud.cpp

@@ -223,16 +223,12 @@ void Hud::drawItem(const ItemStack &item, const core::rect<s32>& rect,
 		client, selected ? IT_ROT_SELECTED : IT_ROT_NONE);
 }
 
-//NOTE: selectitem = 0 -> no selected; selectitem 1-based
+// NOTE: selectitem = 0 -> no selected; selectitem is 1-based
 // mainlist can be NULL, but draw the frame anyway.
 void Hud::drawItems(v2s32 upperleftpos, v2s32 screen_offset, s32 itemcount,
-		s32 inv_offset, InventoryList *mainlist, u16 selectitem, u16 direction)
+		s32 inv_offset, InventoryList *mainlist, u16 selectitem, u16 direction,
+		bool is_hotbar)
 {
-#ifdef HAVE_TOUCHSCREENGUI
-	if (g_touchscreengui && inv_offset == 0)
-		g_touchscreengui->resetHud();
-#endif
-
 	s32 height  = m_hotbar_imagesize + m_padding * 2;
 	s32 width   = (itemcount - inv_offset) * (m_hotbar_imagesize + m_padding * 2);
 
@@ -292,11 +288,13 @@ void Hud::drawItems(v2s32 upperleftpos, v2s32 screen_offset, s32 itemcount,
 			break;
 		}
 
-		drawItem(mainlist->getItem(i), (imgrect + pos + steppos), (i + 1) == selectitem);
+		core::rect<s32> item_rect = imgrect + pos + steppos;
+
+		drawItem(mainlist->getItem(i), item_rect, (i + 1) == selectitem);
 
 #ifdef HAVE_TOUCHSCREENGUI
-		if (g_touchscreengui)
-			g_touchscreengui->registerHudItem(i, (imgrect + pos + steppos));
+		if (is_hotbar && g_touchscreengui)
+			g_touchscreengui->registerHotbarRect(i, item_rect);
 #endif
 	}
 }
@@ -406,7 +404,7 @@ void Hud::drawLuaElements(const v3s16 &camera_offset)
 				if (!inv)
 					warningstream << "HUD: Unknown inventory list. name=" << e->text << std::endl;
 				drawItems(pos, v2s32(e->offset.X, e->offset.Y), e->number, 0,
-					inv, e->item, e->dir);
+					inv, e->item, e->dir, false);
 				break; }
 			case HUD_ELEM_WAYPOINT: {
 				if (!calculateScreenPos(camera_offset, e, &pos))
@@ -739,16 +737,21 @@ void Hud::drawStatbar(v2s32 pos, u16 corner, u16 drawdir,
 }
 
 
-void Hud::drawHotbar(u16 playeritem) {
-
-	v2s32 centerlowerpos(m_displaycenter.X, m_screensize.Y);
+void Hud::drawHotbar(u16 playeritem)
+{
+#ifdef HAVE_TOUCHSCREENGUI
+	if (g_touchscreengui)
+		g_touchscreengui->resetHotbarRects();
+#endif
 
 	InventoryList *mainlist = inventory->getList("main");
 	if (mainlist == NULL) {
-		//silently ignore this we may not be initialized completely
+		// Silently ignore this. We may not be initialized completely.
 		return;
 	}
 
+	v2s32 centerlowerpos(m_displaycenter.X, m_screensize.Y);
+
 	s32 hotbar_itemcount = player->hud_hotbar_itemcount;
 	s32 width = hotbar_itemcount * (m_hotbar_imagesize + m_padding * 2);
 	v2s32 pos = centerlowerpos - v2s32(width / 2, m_hotbar_imagesize + m_padding * 3);
@@ -757,7 +760,7 @@ void Hud::drawHotbar(u16 playeritem) {
 	if ((float) width / (float) window_size.X <=
 			g_settings->getFloat("hud_hotbar_max_width")) {
 		if (player->hud_flags & HUD_FLAG_HOTBAR_VISIBLE) {
-			drawItems(pos, v2s32(0, 0), hotbar_itemcount, 0, mainlist, playeritem + 1, 0);
+			drawItems(pos, v2s32(0, 0), hotbar_itemcount, 0, mainlist, playeritem + 1, 0, true);
 		}
 	} else {
 		pos.X += width/4;
@@ -767,9 +770,9 @@ void Hud::drawHotbar(u16 playeritem) {
 
 		if (player->hud_flags & HUD_FLAG_HOTBAR_VISIBLE) {
 			drawItems(pos, v2s32(0, 0), hotbar_itemcount / 2, 0,
-				mainlist, playeritem + 1, 0);
+				mainlist, playeritem + 1, 0, true);
 			drawItems(secondpos, v2s32(0, 0), hotbar_itemcount,
-				hotbar_itemcount / 2, mainlist, playeritem + 1, 0);
+				hotbar_itemcount / 2, mainlist, playeritem + 1, 0, true);
 		}
 	}
 }

src/client/hud.h

@@ -101,7 +101,7 @@ private:
 
 	void drawItems(v2s32 upperleftpos, v2s32 screen_offset, s32 itemcount,
 			s32 inv_offset, InventoryList *mainlist, u16 selectitem,
-			u16 direction);
+			u16 direction, bool is_hotbar);
 
 	void drawItem(const ItemStack &item, const core::rect<s32> &rect, bool selected);
 

src/gui/touchscreengui.cpp

@@ -583,25 +583,28 @@ touch_gui_button_id TouchScreenGUI::getButtonID(size_t eventID)
 	return after_last_element_id;
 }
 
-bool TouchScreenGUI::isHUDButton(const SEvent &event)
+bool TouchScreenGUI::isHotbarButton(const SEvent &event)
 {
-	// check if hud item is pressed
-	for (auto &hud_rect : m_hud_rects) {
-		if (hud_rect.second.isPointInside(v2s32(event.TouchInput.X, event.TouchInput.Y))) {
-			SEvent translated{};
-			translated.EventType            = irr::EET_KEY_INPUT_EVENT;
-			translated.KeyInput.Key         = (irr::EKEY_CODE) (KEY_KEY_1 + hud_rect.first);
-			translated.KeyInput.Control     = false;
-			translated.KeyInput.Shift       = false;
-			translated.KeyInput.PressedDown = true;
-			m_receiver->OnEvent(translated);
-			m_hud_ids[event.TouchInput.ID]  = translated.KeyInput.Key;
+	const v2s32 touch_pos = v2s32(event.TouchInput.X, event.TouchInput.Y);
+	// check if hotbar item is pressed
+	for (auto &[index, rect] : m_hotbar_rects) {
+		if (rect.isPointInside(touch_pos)) {
+			// We can't just emit a keypress event because the number keys
+			// range from 1 to 9, but there may be more hotbar items.
+			m_hotbar_selection = index;
 			return true;
 		}
 	}
 	return false;
 }
 
+std::optional<u16> TouchScreenGUI::getHotbarSelection()
+{
+	auto selection = m_hotbar_selection;
+	m_hotbar_selection = std::nullopt;
+	return selection;
+}
+
 void TouchScreenGUI::handleButtonEvent(touch_gui_button_id button,
 		size_t eventID, bool action)
 {
@@ -745,10 +748,10 @@ void TouchScreenGUI::translateEvent(const SEvent &event)
 			handleButtonEvent(button, eventID, true);
 			m_settings_bar.deactivate();
 			m_rare_controls_bar.deactivate();
-		} else if (isHUDButton(event)) {
+		} else if (isHotbarButton(event)) {
 			m_settings_bar.deactivate();
 			m_rare_controls_bar.deactivate();
-			// already handled in isHUDButton()
+			// already handled in isHotbarButton()
 		} else if (m_settings_bar.isButton(event)) {
 			m_rare_controls_bar.deactivate();
 			// already handled in isSettingsBarButton()
@@ -1071,14 +1074,14 @@ void TouchScreenGUI::step(float dtime)
 	m_rare_controls_bar.step(dtime);
 }
 
-void TouchScreenGUI::resetHud()
+void TouchScreenGUI::resetHotbarRects()
 {
-	m_hud_rects.clear();
+	m_hotbar_rects.clear();
 }
 
-void TouchScreenGUI::registerHudItem(int index, const rect<s32> &rect)
+void TouchScreenGUI::registerHotbarRect(u16 index, const rect<s32> &rect)
 {
-	m_hud_rects[index] = rect;
+	m_hotbar_rects[index] = rect;
 }
 
 void TouchScreenGUI::setVisible(bool visible)

src/gui/touchscreengui.h

@@ -24,8 +24,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <IGUIEnvironment.h>
 #include <IrrlichtDevice.h>
 
-#include <map>
 #include <memory>
+#include <optional>
+#include <unordered_map>
 #include <vector>
 
 #include "client/tile.h"
@@ -186,14 +187,16 @@ public:
 	float getMovementSpeed() { return m_joystick_speed; }
 
 	void step(float dtime);
-	void resetHud();
-	void registerHudItem(int index, const rect<s32> &rect);
 	inline void setUseCrosshair(bool use_crosshair) { m_draw_crosshair = use_crosshair; }
 
 	void setVisible(bool visible);
 	void hide();
 	void show();
 
+	void resetHotbarRects();
+	void registerHotbarRect(u16 index, const rect<s32> &rect);
+	std::optional<u16> getHotbarSelection();
+
 private:
 	bool m_initialized = false;
 	IrrlichtDevice *m_device;
@@ -203,10 +206,11 @@ private:
 	v2u32 m_screensize;
 	s32 button_size;
 	double m_touchscreen_threshold;
-	std::map<int, rect<s32>> m_hud_rects;
-	std::map<size_t, EKEY_CODE> m_hud_ids;
 	bool m_visible; // is the whole touch screen gui visible
 
+	std::unordered_map<u16, rect<s32>> m_hotbar_rects;
+	std::optional<u16> m_hotbar_selection = std::nullopt;
+
 	// value in degree
 	double m_camera_yaw_change = 0.0;
 	double m_camera_pitch = 0.0;
@@ -272,8 +276,8 @@ private:
 	// handle a button event
 	void handleButtonEvent(touch_gui_button_id bID, size_t eventID, bool action);
 
-	// handle pressed hud buttons
-	bool isHUDButton(const SEvent &event);
+	// handle pressing hotbar items
+	bool isHotbarButton(const SEvent &event);
 
 	// do a right-click
 	bool doRightClick();
@@ -285,7 +289,7 @@ private:
 	void applyJoystickStatus();
 
 	// array for saving last known position of a pointer
-	std::map<size_t, v2s32> m_pointer_pos;
+	std::unordered_map<size_t, v2s32> m_pointer_pos;
 
 	// settings bar
 	AutoHideButtonBar m_settings_bar;