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[HTML5] Opt-in virtual keyboard support.

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Added as an export option "Experimental Virtual Keyboard".
There is no zoom, so text/line edit must be in the top part of the
screen, or it will get hidden by the virtual keyboard.
UTF8/Latin-1 only (I think regular UTF-8 should work out of the box in
4.0 but I can't test it).
It uses an hidden textarea or input, based on the multiline variable,
and only gets activated if the device has a touchscreen.
This could cause problems on devices with both touchscreen and a real
keyboard (although input should still work in general with some minor
focus issues). I'm thinking of a system to detect the first physical
keystroke and disable it in case, but it might do more harm then good,
so it must be well thought.
This commit is contained in:
Fabio Alessandrelli
2021-03-08 23:16:51 +01:00
parent eda5ae9d75
commit 3416f7b521
7 changed files with 202 additions and 4 deletions
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5
platform/javascript/display_server_javascript.h
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@@ -75,6 +75,8 @@ private:
static EM_BOOL keypress_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
static EM_BOOL keyup_callback(int p_event_type, const EmscriptenKeyboardEvent *p_event, void *p_user_data);
static void vk_input_text_callback(const char *p_text, int p_cursor);
static EM_BOOL mousemove_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
static EM_BOOL mouse_button_callback(int p_event_type, const EmscriptenMouseEvent *p_event, void *p_user_data);
@@ -135,6 +137,9 @@ public:
int screen_get_dpi(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
float screen_get_scale(int p_screen = SCREEN_OF_MAIN_WINDOW) const override;
void virtual_keyboard_show(const String &p_existing_text, const Rect2 &p_screen_rect = Rect2(), bool p_multiline = false, int p_max_input_length = -1, int p_cursor_start = -1, int p_cursor_end = -1) override;
void virtual_keyboard_hide() override;
// windows
Vector<DisplayServer::WindowID> get_window_list() const override;
WindowID get_window_at_screen_position(const Point2i &p_position) const override;