Place nodes with single tap on Android (+ bugfix) (#13187)

Don't place nodes when closing button bars.
Update docs (also in-game).
Rename "Default controls" -> "Controls" in Android pause menu since players can't change them (normally), so calling them "default" doesn't make sense.

doc/android.md

@@ -1,5 +1,3 @@
-**This document is based on the Minetest 5.6.1 version for Android**
-
 # Minetest Android build
 All Minetest builds, including the Android variant, are based on the same code.
 However, additional Java code is used for proper Android integration.
@@ -11,8 +9,8 @@ due to limited capabilities of common devices. What can be done is described bel
 While you're playing the game normally (that is, no menu or inventory is
 shown), the following controls are available:
 * Look around: touch screen and slide finger
-* Double tap: Place a node
-* Long tap: Dig node or use the holding item
+* Tap: Place a node
+* Long tap: Dig node or use the held item
 * Press back: Pause menu
 * Touch buttons: Press button
 * Buttons:
@@ -33,9 +31,8 @@ When a menu or inventory is displayed:
   --> places a single item from dragged stack into current (first touched) slot. If a stack is selected, the stack will be split as half and one of the splitted stack will be selected
 
 ### Limitations
-* Android player have to double tap to place node, this can be annoying in some game/mod
 * Some old Android device only support 2 touch at a time, some game/mod contain button combination that need 3 touch (example: jump + Aux1 + hold)
-* Complicated control like pick up an cart in MTG can be difficult or impossible on Android device
+* Complicated control can be difficult or impossible on Android device
 
 ## File Path
 There are some settings especially useful for Android users. The Minetest-wide

src/client/game.cpp

@@ -4335,12 +4335,12 @@ void Game::showDeathFormspec()
 void Game::showPauseMenu()
 {
 #ifdef HAVE_TOUCHSCREENGUI
-	static const std::string control_text = strgettext("Default Controls:\n"
-		"No menu visible:\n"
-		"- single tap: button activate\n"
-		"- double tap: place/use\n"
+	static const std::string control_text = strgettext("Controls:\n"
+		"No menu open:\n"
 		"- slide finger: look around\n"
-		"Menu/Inventory visible:\n"
+		"- tap: place/use\n"
+		"- long tap: dig/punch/use\n"
+		"Menu/inventory open:\n"
 		"- double tap (outside):\n"
 		" --> close\n"
 		"- touch stack, touch slot:\n"

src/gui/touchscreengui.cpp

@@ -692,9 +692,8 @@ void TouchScreenGUI::handleReleaseEvent(size_t evt_id)
 			}
 			m_receiver->OnEvent(*translated);
 			delete translated;
-		} else {
-			// do double tap detection
-			doubleTapDetection();
+		} else if (!m_move_has_really_moved) {
+			doRightClick();
 		}
 	}
 
@@ -773,8 +772,11 @@ void TouchScreenGUI::translateEvent(const SEvent &event)
 			// already handled in isSettingsBarButton()
 		} else {
 			// handle non button events
+			if (m_settingsbar.active() || m_rarecontrolsbar.active()) {
 				m_settingsbar.deactivate();
 				m_rarecontrolsbar.deactivate();
+				return;
+			}
 
 			s32 dxj = event.TouchInput.X - button_size * 5.0f / 2.0f;
 			s32 dyj = event.TouchInput.Y - (s32)m_screensize.Y + button_size * 5.0f / 2.0f;
@@ -999,29 +1001,9 @@ void TouchScreenGUI::handleChangedButton(const SEvent &event)
 				event.TouchInput.ID, true);
 }
 
-bool TouchScreenGUI::doubleTapDetection()
+bool TouchScreenGUI::doRightClick()
 {
-	m_key_events[0].down_time = m_key_events[1].down_time;
-	m_key_events[0].x         = m_key_events[1].x;
-	m_key_events[0].y         = m_key_events[1].y;
-	m_key_events[1].down_time = m_move_downtime;
-	m_key_events[1].x         = m_move_downlocation.X;
-	m_key_events[1].y         = m_move_downlocation.Y;
-
-	u64 delta = porting::getDeltaMs(m_key_events[0].down_time, porting::getTimeMs());
-	if (delta > 400)
-		return false;
-
-	double distance = sqrt(
-			(m_key_events[0].x - m_key_events[1].x) *
-			(m_key_events[0].x - m_key_events[1].x) +
-			(m_key_events[0].y - m_key_events[1].y) *
-			(m_key_events[0].y - m_key_events[1].y));
-
-	if (distance > (20 + m_touchscreen_threshold))
-		return false;
-
-	v2s32 mPos = v2s32(m_key_events[0].x, m_key_events[0].y);
+	v2s32 mPos = v2s32(m_move_downlocation.X, m_move_downlocation.Y);
 	if (m_draw_crosshair) {
 		mPos.X = m_screensize.X / 2;
 		mPos.Y = m_screensize.Y / 2;
@@ -1111,10 +1093,6 @@ void TouchScreenGUI::step(float dtime)
 		if (!button.ids.empty()) {
 			button.repeatcounter += dtime;
 
-			// in case we're moving around digging does not happen
-			if (m_has_move_id)
-				m_move_has_really_moved = true;
-
 			if (button.repeatcounter < button.repeatdelay)
 				continue;
 

src/gui/touchscreengui.h

@@ -130,6 +130,9 @@ public:
 	// step handler
 	void step(float dtime);
 
+	// return whether the button bar is active
+	bool active() { return m_active; }
+
 	// deactivate button bar
 	void deactivate();
 
@@ -284,8 +287,8 @@ private:
 	// handle pressed hud buttons
 	bool isHUDButton(const SEvent &event);
 
-	// handle double taps
-	bool doubleTapDetection();
+	// do a right-click
+	bool doRightClick();
 
 	// handle release event
 	void handleReleaseEvent(size_t evt_id);
@@ -293,20 +296,9 @@ private:
 	// apply joystick status
 	void applyJoystickStatus();
 
-	// double-click detection variables
-	struct key_event
-	{
-		u64 down_time;
-		s32 x;
-		s32 y;
-	};
-
 	// array for saving last known position of a pointer
 	std::map<size_t, v2s32> m_pointerpos;
 
-	// array for double tap detection
-	key_event m_key_events[2];
-
 	// settings bar
 	AutoHideButtonBar m_settingsbar;