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| -rw-r--r-- | src/imgui/backends/imgui_impl_android.cpp | 306 |
1 files changed, 306 insertions, 0 deletions
diff --git a/src/imgui/backends/imgui_impl_android.cpp b/src/imgui/backends/imgui_impl_android.cpp new file mode 100644 index 0000000..7dd2afc --- /dev/null +++ b/src/imgui/backends/imgui_impl_android.cpp @@ -0,0 +1,306 @@ +// dear imgui: Platform Binding for Android native app +// This needs to be used along with the OpenGL 3 Renderer (imgui_impl_opengl3) + +// Implemented features: +// [X] Platform: Keyboard support. Since 1.87 we are using the io.AddKeyEvent() function. Pass ImGuiKey values to all key functions e.g. ImGui::IsKeyPressed(ImGuiKey_Space). [Legacy AKEYCODE_* values will also be supported unless IMGUI_DISABLE_OBSOLETE_KEYIO is set] +// [X] Platform: Mouse support. Can discriminate Mouse/TouchScreen/Pen. +// Missing features: +// [ ] Platform: Clipboard support. +// [ ] Platform: Gamepad support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad'. +// [ ] Platform: Mouse cursor shape and visibility. Disable with 'io.ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange'. FIXME: Check if this is even possible with Android. +// Important: +// - Consider using SDL or GLFW backend on Android, which will be more full-featured than this. +// - FIXME: On-screen keyboard currently needs to be enabled by the application (see examples/ and issue #3446) +// - FIXME: Unicode character inputs needs to be passed by Dear ImGui by the application (see examples/ and issue #3446) + +// You can use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. +// Prefer including the entire imgui/ repository into your project (either as a copy or as a submodule), and only build the backends you need. +// Learn about Dear ImGui: +// - FAQ https://dearimgui.com/faq +// - Getting Started https://dearimgui.com/getting-started +// - Documentation https://dearimgui.com/docs (same as your local docs/ folder). +// - Introduction, links and more at the top of imgui.cpp + +// CHANGELOG +// (minor and older changes stripped away, please see git history for details) +// 2022-09-26: Inputs: Renamed ImGuiKey_ModXXX introduced in 1.87 to ImGuiMod_XXX (old names still supported). +// 2022-01-26: Inputs: replaced short-lived io.AddKeyModsEvent() (added two weeks ago) with io.AddKeyEvent() using ImGuiKey_ModXXX flags. Sorry for the confusion. +// 2022-01-17: Inputs: calling new io.AddMousePosEvent(), io.AddMouseButtonEvent(), io.AddMouseWheelEvent() API (1.87+). +// 2022-01-10: Inputs: calling new io.AddKeyEvent(), io.AddKeyModsEvent() + io.SetKeyEventNativeData() API (1.87+). Support for full ImGuiKey range. +// 2021-03-04: Initial version. + +#include "imgui.h" +#ifndef IMGUI_DISABLE +#include "imgui_impl_android.h" +#include <time.h> +#include <android/native_window.h> +#include <android/input.h> +#include <android/keycodes.h> +#include <android/log.h> + +// Android data +static double g_Time = 0.0; +static ANativeWindow* g_Window; +static char g_LogTag[] = "ImGuiExample"; + +static ImGuiKey ImGui_ImplAndroid_KeyCodeToImGuiKey(int32_t key_code) +{ + switch (key_code) + { + case AKEYCODE_TAB: return ImGuiKey_Tab; + case AKEYCODE_DPAD_LEFT: return ImGuiKey_LeftArrow; + case AKEYCODE_DPAD_RIGHT: return ImGuiKey_RightArrow; + case AKEYCODE_DPAD_UP: return ImGuiKey_UpArrow; + case AKEYCODE_DPAD_DOWN: return ImGuiKey_DownArrow; + case AKEYCODE_PAGE_UP: return ImGuiKey_PageUp; + case AKEYCODE_PAGE_DOWN: return ImGuiKey_PageDown; + case AKEYCODE_MOVE_HOME: return ImGuiKey_Home; + case AKEYCODE_MOVE_END: return ImGuiKey_End; + case AKEYCODE_INSERT: return ImGuiKey_Insert; + case AKEYCODE_FORWARD_DEL: return ImGuiKey_Delete; + case AKEYCODE_DEL: return ImGuiKey_Backspace; + case AKEYCODE_SPACE: return ImGuiKey_Space; + case AKEYCODE_ENTER: return ImGuiKey_Enter; + case AKEYCODE_ESCAPE: return ImGuiKey_Escape; + case AKEYCODE_APOSTROPHE: return ImGuiKey_Apostrophe; + case AKEYCODE_COMMA: return ImGuiKey_Comma; + case AKEYCODE_MINUS: return ImGuiKey_Minus; + case AKEYCODE_PERIOD: return ImGuiKey_Period; + case AKEYCODE_SLASH: return ImGuiKey_Slash; + case AKEYCODE_SEMICOLON: return ImGuiKey_Semicolon; + case AKEYCODE_EQUALS: return ImGuiKey_Equal; + case AKEYCODE_LEFT_BRACKET: return ImGuiKey_LeftBracket; + case AKEYCODE_BACKSLASH: return ImGuiKey_Backslash; + case AKEYCODE_RIGHT_BRACKET: return ImGuiKey_RightBracket; + case AKEYCODE_GRAVE: return ImGuiKey_GraveAccent; + case AKEYCODE_CAPS_LOCK: return ImGuiKey_CapsLock; + case AKEYCODE_SCROLL_LOCK: return ImGuiKey_ScrollLock; + case AKEYCODE_NUM_LOCK: return ImGuiKey_NumLock; + case AKEYCODE_SYSRQ: return ImGuiKey_PrintScreen; + case AKEYCODE_BREAK: return ImGuiKey_Pause; + case AKEYCODE_NUMPAD_0: return ImGuiKey_Keypad0; + case AKEYCODE_NUMPAD_1: return ImGuiKey_Keypad1; + case AKEYCODE_NUMPAD_2: return ImGuiKey_Keypad2; + case AKEYCODE_NUMPAD_3: return ImGuiKey_Keypad3; + case AKEYCODE_NUMPAD_4: return ImGuiKey_Keypad4; + case AKEYCODE_NUMPAD_5: return ImGuiKey_Keypad5; + case AKEYCODE_NUMPAD_6: return ImGuiKey_Keypad6; + case AKEYCODE_NUMPAD_7: return ImGuiKey_Keypad7; + case AKEYCODE_NUMPAD_8: return ImGuiKey_Keypad8; + case AKEYCODE_NUMPAD_9: return ImGuiKey_Keypad9; + case AKEYCODE_NUMPAD_DOT: return ImGuiKey_KeypadDecimal; + case AKEYCODE_NUMPAD_DIVIDE: return ImGuiKey_KeypadDivide; + case AKEYCODE_NUMPAD_MULTIPLY: return ImGuiKey_KeypadMultiply; + case AKEYCODE_NUMPAD_SUBTRACT: return ImGuiKey_KeypadSubtract; + case AKEYCODE_NUMPAD_ADD: return ImGuiKey_KeypadAdd; + case AKEYCODE_NUMPAD_ENTER: return ImGuiKey_KeypadEnter; + case AKEYCODE_NUMPAD_EQUALS: return ImGuiKey_KeypadEqual; + case AKEYCODE_CTRL_LEFT: return ImGuiKey_LeftCtrl; + case AKEYCODE_SHIFT_LEFT: return ImGuiKey_LeftShift; + case AKEYCODE_ALT_LEFT: return ImGuiKey_LeftAlt; + case AKEYCODE_META_LEFT: return ImGuiKey_LeftSuper; + case AKEYCODE_CTRL_RIGHT: return ImGuiKey_RightCtrl; + case AKEYCODE_SHIFT_RIGHT: return ImGuiKey_RightShift; + case AKEYCODE_ALT_RIGHT: return ImGuiKey_RightAlt; + case AKEYCODE_META_RIGHT: return ImGuiKey_RightSuper; + case AKEYCODE_MENU: return ImGuiKey_Menu; + case AKEYCODE_0: return ImGuiKey_0; + case AKEYCODE_1: return ImGuiKey_1; + case AKEYCODE_2: return ImGuiKey_2; + case AKEYCODE_3: return ImGuiKey_3; + case AKEYCODE_4: return ImGuiKey_4; + case AKEYCODE_5: return ImGuiKey_5; + case AKEYCODE_6: return ImGuiKey_6; + case AKEYCODE_7: return ImGuiKey_7; + case AKEYCODE_8: return ImGuiKey_8; + case AKEYCODE_9: return ImGuiKey_9; + case AKEYCODE_A: return ImGuiKey_A; + case AKEYCODE_B: return ImGuiKey_B; + case AKEYCODE_C: return ImGuiKey_C; + case AKEYCODE_D: return ImGuiKey_D; + case AKEYCODE_E: return ImGuiKey_E; + case AKEYCODE_F: return ImGuiKey_F; + case AKEYCODE_G: return ImGuiKey_G; + case AKEYCODE_H: return ImGuiKey_H; + case AKEYCODE_I: return ImGuiKey_I; + case AKEYCODE_J: return ImGuiKey_J; + case AKEYCODE_K: return ImGuiKey_K; + case AKEYCODE_L: return ImGuiKey_L; + case AKEYCODE_M: return ImGuiKey_M; + case AKEYCODE_N: return ImGuiKey_N; + case AKEYCODE_O: return ImGuiKey_O; + case AKEYCODE_P: return ImGuiKey_P; + case AKEYCODE_Q: return ImGuiKey_Q; + case AKEYCODE_R: return ImGuiKey_R; + case AKEYCODE_S: return ImGuiKey_S; + case AKEYCODE_T: return ImGuiKey_T; + case AKEYCODE_U: return ImGuiKey_U; + case AKEYCODE_V: return ImGuiKey_V; + case AKEYCODE_W: return ImGuiKey_W; + case AKEYCODE_X: return ImGuiKey_X; + case AKEYCODE_Y: return ImGuiKey_Y; + case AKEYCODE_Z: return ImGuiKey_Z; + case AKEYCODE_F1: return ImGuiKey_F1; + case AKEYCODE_F2: return ImGuiKey_F2; + case AKEYCODE_F3: return ImGuiKey_F3; + case AKEYCODE_F4: return ImGuiKey_F4; + case AKEYCODE_F5: return ImGuiKey_F5; + case AKEYCODE_F6: return ImGuiKey_F6; + case AKEYCODE_F7: return ImGuiKey_F7; + case AKEYCODE_F8: return ImGuiKey_F8; + case AKEYCODE_F9: return ImGuiKey_F9; + case AKEYCODE_F10: return ImGuiKey_F10; + case AKEYCODE_F11: return ImGuiKey_F11; + case AKEYCODE_F12: return ImGuiKey_F12; + default: return ImGuiKey_None; + } +} + +int32_t ImGui_ImplAndroid_HandleInputEvent(const AInputEvent* input_event) +{ + ImGuiIO& io = ImGui::GetIO(); + int32_t event_type = AInputEvent_getType(input_event); + switch (event_type) + { + case AINPUT_EVENT_TYPE_KEY: + { + int32_t event_key_code = AKeyEvent_getKeyCode(input_event); + int32_t event_scan_code = AKeyEvent_getScanCode(input_event); + int32_t event_action = AKeyEvent_getAction(input_event); + int32_t event_meta_state = AKeyEvent_getMetaState(input_event); + + io.AddKeyEvent(ImGuiMod_Ctrl, (event_meta_state & AMETA_CTRL_ON) != 0); + io.AddKeyEvent(ImGuiMod_Shift, (event_meta_state & AMETA_SHIFT_ON) != 0); + io.AddKeyEvent(ImGuiMod_Alt, (event_meta_state & AMETA_ALT_ON) != 0); + io.AddKeyEvent(ImGuiMod_Super, (event_meta_state & AMETA_META_ON) != 0); + + switch (event_action) + { + // FIXME: AKEY_EVENT_ACTION_DOWN and AKEY_EVENT_ACTION_UP occur at once as soon as a touch pointer + // goes up from a key. We use a simple key event queue/ and process one event per key per frame in + // ImGui_ImplAndroid_NewFrame()...or consider using IO queue, if suitable: https://github.com/ocornut/imgui/issues/2787 + case AKEY_EVENT_ACTION_DOWN: + case AKEY_EVENT_ACTION_UP: + { + ImGuiKey key = ImGui_ImplAndroid_KeyCodeToImGuiKey(event_key_code); + if (key != ImGuiKey_None) + { + io.AddKeyEvent(key, event_action == AKEY_EVENT_ACTION_DOWN); + io.SetKeyEventNativeData(key, event_key_code, event_scan_code); + } + + break; + } + default: + break; + } + break; + } + case AINPUT_EVENT_TYPE_MOTION: + { + int32_t event_action = AMotionEvent_getAction(input_event); + int32_t event_pointer_index = (event_action & AMOTION_EVENT_ACTION_POINTER_INDEX_MASK) >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT; + event_action &= AMOTION_EVENT_ACTION_MASK; + + switch (AMotionEvent_getToolType(input_event, event_pointer_index)) + { + case AMOTION_EVENT_TOOL_TYPE_MOUSE: + io.AddMouseSourceEvent(ImGuiMouseSource_Mouse); + break; + case AMOTION_EVENT_TOOL_TYPE_STYLUS: + case AMOTION_EVENT_TOOL_TYPE_ERASER: + io.AddMouseSourceEvent(ImGuiMouseSource_Pen); + break; + case AMOTION_EVENT_TOOL_TYPE_FINGER: + default: + io.AddMouseSourceEvent(ImGuiMouseSource_TouchScreen); + break; + } + + switch (event_action) + { + case AMOTION_EVENT_ACTION_DOWN: + case AMOTION_EVENT_ACTION_UP: + { + // Physical mouse buttons (and probably other physical devices) also invoke the actions AMOTION_EVENT_ACTION_DOWN/_UP, + // but we have to process them separately to identify the actual button pressed. This is done below via + // AMOTION_EVENT_ACTION_BUTTON_PRESS/_RELEASE. Here, we only process "FINGER" input (and "UNKNOWN", as a fallback). + int tool_type = AMotionEvent_getToolType(input_event, event_pointer_index); + if (tool_type == AMOTION_EVENT_TOOL_TYPE_FINGER || tool_type == AMOTION_EVENT_TOOL_TYPE_UNKNOWN) + { + io.AddMousePosEvent(AMotionEvent_getX(input_event, event_pointer_index), AMotionEvent_getY(input_event, event_pointer_index)); + io.AddMouseButtonEvent(0, event_action == AMOTION_EVENT_ACTION_DOWN); + } + break; + } + case AMOTION_EVENT_ACTION_BUTTON_PRESS: + case AMOTION_EVENT_ACTION_BUTTON_RELEASE: + { + int32_t button_state = AMotionEvent_getButtonState(input_event); + io.AddMouseButtonEvent(0, (button_state & AMOTION_EVENT_BUTTON_PRIMARY) != 0); + io.AddMouseButtonEvent(1, (button_state & AMOTION_EVENT_BUTTON_SECONDARY) != 0); + io.AddMouseButtonEvent(2, (button_state & AMOTION_EVENT_BUTTON_TERTIARY) != 0); + break; + } + case AMOTION_EVENT_ACTION_HOVER_MOVE: // Hovering: Tool moves while NOT pressed (such as a physical mouse) + case AMOTION_EVENT_ACTION_MOVE: // Touch pointer moves while DOWN + io.AddMousePosEvent(AMotionEvent_getX(input_event, event_pointer_index), AMotionEvent_getY(input_event, event_pointer_index)); + break; + case AMOTION_EVENT_ACTION_SCROLL: + io.AddMouseWheelEvent(AMotionEvent_getAxisValue(input_event, AMOTION_EVENT_AXIS_HSCROLL, event_pointer_index), AMotionEvent_getAxisValue(input_event, AMOTION_EVENT_AXIS_VSCROLL, event_pointer_index)); + break; + default: + break; + } + } + return 1; + default: + break; + } + + return 0; +} + +bool ImGui_ImplAndroid_Init(ANativeWindow* window) +{ + g_Window = window; + g_Time = 0.0; + + // Setup backend capabilities flags + ImGuiIO& io = ImGui::GetIO(); + io.BackendPlatformName = "imgui_impl_android"; + + return true; +} + +void ImGui_ImplAndroid_Shutdown() +{ + ImGuiIO& io = ImGui::GetIO(); + io.BackendPlatformName = nullptr; +} + +void ImGui_ImplAndroid_NewFrame() +{ + ImGuiIO& io = ImGui::GetIO(); + + // Setup display size (every frame to accommodate for window resizing) + int32_t window_width = ANativeWindow_getWidth(g_Window); + int32_t window_height = ANativeWindow_getHeight(g_Window); + int display_width = window_width; + int display_height = window_height; + + io.DisplaySize = ImVec2((float)window_width, (float)window_height); + if (window_width > 0 && window_height > 0) + io.DisplayFramebufferScale = ImVec2((float)display_width / window_width, (float)display_height / window_height); + + // Setup time step + struct timespec current_timespec; + clock_gettime(CLOCK_MONOTONIC, ¤t_timespec); + double current_time = (double)(current_timespec.tv_sec) + (current_timespec.tv_nsec / 1000000000.0); + io.DeltaTime = g_Time > 0.0 ? (float)(current_time - g_Time) : (float)(1.0f / 60.0f); + g_Time = current_time; +} + +//----------------------------------------------------------------------------- + +#endif // #ifndef IMGUI_DISABLE |