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Formspec: Pass the second-touch event as is (minetest#13872)
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The second-touch event is passed to the GUIFormSpecMenu::OnEvent() function as a touch event.
There are two types of event for inventory formspec: (1) mouse event and (2) touch event.
The touch event is just a modifier of the mouse event.


Co-authored-by: Gregor Parzefall <[email protected]>
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@srifqi @grorp
srifqi and grorp authored Nov 28, 2023
1 parent 771da80 commit 53886dc
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Showing 3 changed files with 97 additions and 62 deletions.
128 changes: 86 additions & 42 deletions src/gui/guiFormSpecMenu.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -4200,14 +4200,16 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
}

/* Mouse event other than movement, or crossing the border of inventory
field while holding left, right, or middle mouse button
field while holding left, right, or middle mouse button
or touch event (for touch screen devices)
*/
if (event.EventType == EET_MOUSE_INPUT_EVENT &&
(event.MouseInput.Event != EMIE_MOUSE_MOVED ||
((event.MouseInput.isLeftPressed() ||
event.MouseInput.isRightPressed() ||
event.MouseInput.isMiddlePressed()) &&
getItemAtPos(m_pointer).i != getItemAtPos(m_old_pointer).i))) {
if ((event.EventType == EET_MOUSE_INPUT_EVENT &&
(event.MouseInput.Event != EMIE_MOUSE_MOVED ||
((event.MouseInput.isLeftPressed() ||
event.MouseInput.isRightPressed() ||
event.MouseInput.isMiddlePressed()) &&
getItemAtPos(m_pointer).i != getItemAtPos(m_old_pointer).i))) ||
event.EventType == EET_TOUCH_INPUT_EVENT) {

// Get selected item and hovered/clicked item (s)

Expand Down Expand Up @@ -4276,37 +4278,50 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)

ButtonEventType button = BET_OTHER;
ButtonEventType updown = BET_OTHER;
switch (event.MouseInput.Event) {
case EMIE_LMOUSE_PRESSED_DOWN:
button = BET_LEFT; updown = BET_DOWN;
break;
case EMIE_RMOUSE_PRESSED_DOWN:
button = BET_RIGHT; updown = BET_DOWN;
break;
case EMIE_MMOUSE_PRESSED_DOWN:
button = BET_MIDDLE; updown = BET_DOWN;
break;
case EMIE_MOUSE_WHEEL:
button = (event.MouseInput.Wheel > 0) ?
BET_WHEEL_UP : BET_WHEEL_DOWN;
updown = BET_DOWN;
break;
case EMIE_LMOUSE_LEFT_UP:
button = BET_LEFT; updown = BET_UP;
break;
case EMIE_RMOUSE_LEFT_UP:
button = BET_RIGHT; updown = BET_UP;
break;
case EMIE_MMOUSE_LEFT_UP:
button = BET_MIDDLE; updown = BET_UP;
break;
case EMIE_MOUSE_MOVED:
updown = BET_MOVE;
break;
default:
break;
bool mouse_shift = false;
if (event.EventType == EET_MOUSE_INPUT_EVENT) {
mouse_shift = event.MouseInput.Shift;
switch (event.MouseInput.Event) {
case EMIE_LMOUSE_PRESSED_DOWN:
button = BET_LEFT; updown = BET_DOWN;
break;
case EMIE_RMOUSE_PRESSED_DOWN:
button = BET_RIGHT; updown = BET_DOWN;
break;
case EMIE_MMOUSE_PRESSED_DOWN:
button = BET_MIDDLE; updown = BET_DOWN;
break;
case EMIE_MOUSE_WHEEL:
button = (event.MouseInput.Wheel > 0) ?
BET_WHEEL_UP : BET_WHEEL_DOWN;
updown = BET_DOWN;
break;
case EMIE_LMOUSE_LEFT_UP:
button = BET_LEFT; updown = BET_UP;
break;
case EMIE_RMOUSE_LEFT_UP:
button = BET_RIGHT; updown = BET_UP;
break;
case EMIE_MMOUSE_LEFT_UP:
button = BET_MIDDLE; updown = BET_UP;
break;
case EMIE_MOUSE_MOVED:
updown = BET_MOVE;
break;
default:
break;
}
}

#ifdef HAVE_TOUCHSCREENGUI
// The second touch (see GUIModalMenu::preprocessEvent() function)
ButtonEventType touch = BET_OTHER;
if (event.EventType == EET_TOUCH_INPUT_EVENT) {
if (event.TouchInput.Event == ETIE_LEFT_UP)
touch = BET_RIGHT;
}
#endif

// Set this number to a positive value to generate a move action
// from m_selected_item to s.
u32 move_amount = 0;
Expand All @@ -4332,6 +4347,7 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)

if (m_held_mouse_button != BET_OTHER)
break;

if (button == BET_LEFT || button == BET_RIGHT || button == BET_MIDDLE)
m_held_mouse_button = button;

Expand All @@ -4351,13 +4367,13 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
// Craft preview has been clicked: craft
if (button == BET_MIDDLE)
craft_amount = 10;
else if (event.MouseInput.Shift && button == BET_LEFT)
else if (mouse_shift && button == BET_LEFT)
craft_amount = list_s->getItem(s.i).getStackMax(m_client->idef());
else
craft_amount = 1;

// Holding shift moves the crafted item to the inventory
m_shift_move_after_craft = event.MouseInput.Shift;
m_shift_move_after_craft = mouse_shift;

} else if (!m_selected_item && button != BET_WHEEL_UP && !empty) {
// Non-empty stack has been clicked: select or shift-move it
Expand All @@ -4371,7 +4387,7 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
else if (button == BET_LEFT)
count = s_count;

if (event.MouseInput.Shift) {
if (mouse_shift) {
// Shift pressed: move item, right click moves 1
shift_move_amount = button == BET_RIGHT ? 1 : count;
} else {
Expand All @@ -4392,7 +4408,7 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
else if (button == BET_LEFT)
move_amount = m_selected_amount;

if (event.MouseInput.Shift && !identical && matching) {
if (mouse_shift && !identical && matching) {
// Shift-move all items the same as the selected item to the next list
move_amount = 0;

Expand Down Expand Up @@ -4530,7 +4546,7 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
if (!s.isValid() || s.listname == "craftpreview")
break;

if (!m_selected_item && event.MouseInput.Shift) {
if (!m_selected_item && mouse_shift) {
// Shift-move items while dragging
if (m_held_mouse_button == BET_RIGHT)
shift_move_amount = 1;
Expand Down Expand Up @@ -4580,7 +4596,8 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
case BET_OTHER: {
// Some other mouse event has occured
// Currently only left-double-click should trigger this
if (!s.isValid() || event.MouseInput.Event != EMIE_LMOUSE_DOUBLE_CLICK)
if (!s.isValid() || event.EventType != EET_MOUSE_INPUT_EVENT ||
event.MouseInput.Event != EMIE_LMOUSE_DOUBLE_CLICK)
break;

// Only do the pickup all thing when putting down an item.
Expand Down Expand Up @@ -4648,6 +4665,28 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
break;
}

#ifdef HAVE_TOUCHSCREENGUI
if (touch == BET_RIGHT && m_selected_item && !m_left_dragging) {
if (!s.isValid()) {
// Not a valid slot
if (!getAbsoluteClippingRect().isPointInside(m_pointer))
// Is outside the menu
drop_amount = 1;
} else {
// Over a valid slot
move_amount = 1;
if (identical) {
// Change the selected amount instead of moving
if (move_amount >= m_selected_amount)
m_selected_amount = 0;
else
m_selected_amount -= move_amount;
move_amount = 0;
}
}
}
#endif

// Update left-dragged slots
if (m_left_dragging && m_left_drag_stacks.size() > 1) {
// The split amount will always at least one, because the number
Expand Down Expand Up @@ -5014,6 +5053,11 @@ bool GUIFormSpecMenu::OnEvent(const SEvent& event)
}
}

#ifdef HAVE_TOUCHSCREENGUI
if (m_second_touch)
return true; // Stop propagating the event
#endif

return Parent ? Parent->OnEvent(event) : false;
}

Expand Down
28 changes: 9 additions & 19 deletions src/gui/modalMenu.cpp
View file
Original file line number Diff line number Diff line change
Expand Up @@ -278,12 +278,9 @@ bool GUIModalMenu::preprocessEvent(const SEvent &event)
irr_ptr<GUIModalMenu> holder;
holder.grab(this); // keep this alive until return (it might be dropped downstream [?])

switch ((int)event.TouchInput.touchedCount) {
case 1: {
if (event.TouchInput.ID == 0) {
if (event.TouchInput.Event == ETIE_PRESSED_DOWN || event.TouchInput.Event == ETIE_MOVED)
m_pointer = v2s32(event.TouchInput.X, event.TouchInput.Y);
if (event.TouchInput.Event == ETIE_PRESSED_DOWN)
m_down_pos = m_pointer;
gui::IGUIElement *hovered = Environment->getRootGUIElement()->getElementFromPoint(core::position2d<s32>(m_pointer));
if (event.TouchInput.Event == ETIE_PRESSED_DOWN)
Environment->setFocus(hovered);
Expand All @@ -298,26 +295,19 @@ bool GUIModalMenu::preprocessEvent(const SEvent &event)
if (event.TouchInput.Event == ETIE_LEFT_UP)
leave();
return ret;
}
case 2: {
if (event.TouchInput.Event != ETIE_PRESSED_DOWN)
} else if (event.TouchInput.ID == 1) {
if (event.TouchInput.Event != ETIE_LEFT_UP)
return true; // ignore
auto focused = Environment->getFocus();
if (!focused)
return true;
SEvent rclick_event{};
rclick_event.EventType = EET_MOUSE_INPUT_EVENT;
rclick_event.MouseInput.Event = EMIE_RMOUSE_PRESSED_DOWN;
rclick_event.MouseInput.ButtonStates = EMBSM_LEFT | EMBSM_RIGHT;
rclick_event.MouseInput.X = m_pointer.X;
rclick_event.MouseInput.Y = m_pointer.Y;
focused->OnEvent(rclick_event);
rclick_event.MouseInput.Event = EMIE_RMOUSE_LEFT_UP;
rclick_event.MouseInput.ButtonStates = EMBSM_LEFT;
focused->OnEvent(rclick_event);
// The second-touch event is propagated as is (not converted).
m_second_touch = true;
focused->OnEvent(event);
m_second_touch = false;
return true;
}
default: // ignored
} else {
// Any other touch after the second touch is ignored.
return true;
}
}
Expand Down
3 changes: 2 additions & 1 deletion src/gui/modalMenu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,8 @@ class GUIModalMenu : public gui::IGUIElement
std::string m_jni_field_name;
#endif
#ifdef HAVE_TOUCHSCREENGUI
v2s32 m_down_pos;
// This is set to true if the menu is currently processing a second-touch event.
bool m_second_touch = false;
bool m_touchscreen_visible = true;
#endif

Expand Down

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