83 lines
2.5 KiB
Text
83 lines
2.5 KiB
Text
# frame.ludic - a screen shown: built from the view's model, laid out, drawn, and its presses
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# run once the frame is drawn, so nothing the view does can change a frame half way through it
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export function ui_show(screen: string, view: UiView, x: float, y: float, w: float, h: float) -> void {
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in_read()
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dv_before()
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an_frame += 1
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ui_viewport(w, h)
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let root = ui_nodes(screen, view)
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if root == null { return }
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ui_place(root, x, y, w, h)
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nt_fired_clear()
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sc_undo(root)
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sc_update(root)
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fr_pointer(root)
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fc_keys(root)
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hd_tick(root)
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tt_track(root, in_now.x, in_now.y)
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fb_keep(screen, root)
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if ui_be != null and ui_be.text != null {
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fr_draw(root)
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pp_draw_top()
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tt_draw(root)
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}
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dv_after(screen, root)
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lc_run(screen)
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nt_fired_run()
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}
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# the screen's nodes for this frame, not yet laid out - for a test, or a host that places them
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export function ui_nodes(screen: string, view: UiView) -> UiNode {
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let si = lib_find(lib_screen_names, screen)
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let cls = uc_find(screen)
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if si < 0 and cls != null { return fr_class_nodes(cls) }
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if si < 0 {
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ui_err(`there is no screen {screen} - ui_load the file that has it`)
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return null
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}
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let t = lib_screens[si]
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lc_begin()
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ui_view = view
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let e = env_new(null)
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if view != null and view.model != null { e.model = view.model() } else { e.model = Value.object() }
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e.state = st_for(screen, t, e)
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let root = new UiNode
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root.key = screen
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root.children = new []UiNode
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root.env = e
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root.sheet = t.sheet
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root.classes = new []string
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root.akeys = new []string
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root.avals = new []string
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root.vals = new []Val
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root.tag = "screen"
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for i in 0 .. len(t.keys) {
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if t.keys[i] != "name" { el_keep(root, t.keys[i], ui_eval(t.vals[i], e)) }
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}
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bd_kids(t.kids, e, screen, root.children)
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cs_tree(root)
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return root
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}
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# the room vw, vh and @media measure against; ui_show sets it to the screen's rectangle
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export function ui_viewport(w: float, h: float) -> void {
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ly_vp_w = w
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ly_vp_h = h
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}
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export function ui_place(root: UiNode, x: float, y: float, w: float, h: float) -> void {
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ly_vp_x = x
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ly_vp_y = y
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root.w = UI_FILL
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root.h = UI_FILL
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let fg = 15658734
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ly_fg_a = 1.0
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ly_measure(root, w, ui_px(16.0), fg)
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ly_place(root, x, y, w, h)
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sc_apply(root)
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pp_anchor_all(root)
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}
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# a press, as if the pointer had made it
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export function ui_press(n: UiNode) -> void {
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if n.act != null and n.enabled { act_run(n.act, n.env) }
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}
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# any event, as if the element had fired it - for a test
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export function ui_event(n: UiNode, name: string, value: Val) -> void { nt_run(n, name, value) }
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