115 lines
3.4 KiB
Plaintext
115 lines
3.4 KiB
Plaintext
module ugui;
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import std::io;
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import std::math;
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// TODO: this could be a bitstruct
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bitstruct InputEvents : uint {
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bool resize : 0; // window size was changed
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bool change_focus : 1; // window focus changed
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bool mouse_move : 2; // mouse was moved
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bool mouse_btn : 3; // mouse button pressed or released
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}
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// Window size was changed
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fn void! Ctx.input_window_size(&ctx, short width, short height)
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{
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if (width <= 0 || height <= 0) {
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return UgError.INVALID_SIZE?;
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}
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ctx.width = width;
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ctx.height = height;
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ctx.input.events.resize = true;
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}
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// Window gained/lost focus
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fn void Ctx.input_changefocus(&ctx, bool has_focus)
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{
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// FIXME: raylib only has an API to query the focus status so we have to
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// update the input flag only if the focus changed
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if (ctx.has_focus != has_focus) {
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ctx.input.events.change_focus = true;
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}
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ctx.has_focus = has_focus;
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}
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bitstruct MouseButtons : uint {
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bool btn_left : 0;
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bool btn_middle : 1;
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bool btn_right : 2;
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bool btn_4 : 3;
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bool btn_5 : 4;
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}
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macro Ctx.mouse_pressed(&ctx) => ctx.input.mouse.updated & ctx.input.mouse.down;
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macro Ctx.mouse_released(&ctx) => ctx.input.mouse.updated & ~ctx.input.mouse.down;
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macro Ctx.mouse_down(&ctx) => ctx.input.mouse.down;
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const MouseButtons BTN_NONE = (MouseButtons)0u;
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const MouseButtons BTN_ANY = (MouseButtons)(uint.max);
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const MouseButtons BTN_LEFT = {.btn_left = true};
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const MouseButtons BTN_MIDDLE = {.btn_middle = true};
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const MouseButtons BTN_RIGHT = {.btn_right = true};
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const MouseButtons BTN_4 = {.btn_4 = true};
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const MouseButtons BTN_5 = {.btn_5 = true};
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// FIXME: hthis compairson could be done with a cast using MouseButtons.inner
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// property but I could not figure out how
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macro Ctx.is_mouse_pressed(&ctx, MouseButtons btn) => (ctx.mouse_pressed() & btn) != BTN_NONE;
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macro Ctx.is_mouse_released(&ctx, MouseButtons btn) => (ctx.mouse_released() & btn) != BTN_NONE;
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macro Ctx.is_mouse_down(&ctx, MouseButtons btn) => (ctx.mouse_down() & btn) != BTN_NONE;
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macro ElemEvents Ctx.get_elem_events(&ctx, Elem *elem)
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{
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// TODO: add the other events
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// FIXME: active should be elsewhere
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bool active = elem.events.mouse_hold || ctx.is_hovered(elem);
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ElemEvents ev = {
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.mouse_hover = ctx.is_hovered(elem),
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.mouse_press = active & ctx.is_mouse_pressed(BTN_ANY),
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.mouse_release = active & ctx.is_mouse_released(BTN_ANY),
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.mouse_hold = active & ctx.is_mouse_down(BTN_ANY),
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};
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return ev;
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}
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// Mouse Button moved
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fn void Ctx.input_mouse_button(&ctx, MouseButtons buttons)
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{
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ctx.input.mouse.updated = ctx.input.mouse.down ^ buttons;
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ctx.input.mouse.down = buttons;
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ctx.input.events.mouse_btn = true;
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}
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// Mouse was moved, report absolute position
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fn void Ctx.input_mouse_abs(&ctx, short x, short y)
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{
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ctx.input.mouse.pos.x = math::clamp(x, 0u16, ctx.width);
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ctx.input.mouse.pos.y = math::clamp(y, 0u16, ctx.height);
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short dx, dy;
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dx = x - ctx.input.mouse.pos.x;
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dy = y - ctx.input.mouse.pos.y;
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ctx.input.mouse.delta.x = dx;
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ctx.input.mouse.delta.y = dy;
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ctx.input.events.mouse_move = true;
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}
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// Mouse was moved, report relative motion
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fn void Ctx.input_mouse_delta(&ctx, short dx, short dy)
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{
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ctx.input.mouse.delta.x = dx;
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ctx.input.mouse.delta.y = dy;
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short mx, my;
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mx = ctx.input.mouse.pos.x + dx;
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my = ctx.input.mouse.pos.y + dy;
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ctx.input.mouse.pos.x = math::clamp(mx, 0u16, ctx.width);
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ctx.input.mouse.pos.y = math::clamp(my, 0u16, ctx.height);
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ctx.input.events.mouse_move = true;
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}
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