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1.1 ! root 1: shadesdemo = proc () ! 2: ai = array[int] ! 3: side: int := 8 ! 4: pixs: pixellist ! 5: mask: int ! 6: while true do ! 7: pixs, mask := x_display$alloc_cells(side * side, 0, false) ! 8: except when error (why: string): ! 9: if side = 1 ! 10: then signal failure(why) end ! 11: side := side - 1 ! 12: continue ! 13: end ! 14: break ! 15: end ! 16: bwidth: int := int$parse(xdemo_default("shades", "BorderWidth")) ! 17: except when not_found, overflow, bad_format: bwidth := 2 end ! 18: bdr: x_pixmap := x_display$black() ! 19: begin ! 20: r, g, b: int := x_parse_color(xdemo_default("shades", "Border")) ! 21: bdr := x_pixmap$tile(x_display$alloc_color(r, g, b)) ! 22: end except when not_found: end ! 23: w: x_window, wid0, hgt0: int := x_cons("shades", bdr, bdr, ! 24: xdemo_geometry(), "=400x400+1+1", ! 25: 40, 40, bwidth) ! 26: w.name := "shades" ! 27: x_window$map(w) ! 28: w.input := ButtonPressed + ExposeWindow ! 29: w.cursor := x_cursor$scons(cross_width, cross_height, cross, cross_mask, ! 30: WhitePixel, BlackPixel, cross_x, cross_y, GXcopy) ! 31: ev: event := x_input$empty_event() ! 32: deltas: ai := ai$fill(1, side, 0) ! 33: for i: int in int$from_to(1, side) do ! 34: deltas[i] := (255 * 256 * (i - 1)) / (side - 1) ! 35: end ! 36: defs: colordeflist := colordeflist$predict(1, side * side) ! 37: for i: int in int$from_to(1, side) do ! 38: for j: int in int$from_to(1, side) do ! 39: colordeflist$addh(defs, colordef${pixel: pixs[(i - 1) * side + j], ! 40: red: 0, ! 41: green: 0, ! 42: blue: 0}) ! 43: end ! 44: end ! 45: x_display$store_colors(defs) ! 46: addblue: bool := true ! 47: addgreen: bool := false ! 48: addred: bool := false ! 49: donew: bool := true ! 50: delta: int := 1 ! 51: while true do ! 52: sx, sy, pwidth, pheight, bw, ms, wk: int, iw: x_window := x_window$query(w) ! 53: width: int := pwidth / side ! 54: height: int := pheight / side ! 55: if height <= 1 cor width <= 1 ! 56: then x_window$destroy(w) ! 57: return ! 58: end ! 59: x: int := (pwidth - width * side) / 2 ! 60: y: int := (pheight - height * side) / 2 ! 61: for i: int in int$from_to(1, side) do ! 62: for j: int in int$from_to(1, side) do ! 63: d: colordef := defs[(i - 1) * side + j] ! 64: x_window$pix_set(w, d.pixel, ! 65: (i - 1) * width + x, (j - 1) * height + y, ! 66: width, height) ! 67: end ! 68: end ! 69: while true do ! 70: if donew ! 71: then for i: int in int$from_to(1, side) do ! 72: for j: int in int$from_to(1, side) do ! 73: d: colordef := defs[(i - 1) * side + j] ! 74: if addblue ! 75: then d.red := deltas[i] ! 76: d.green := deltas[j] ! 77: d.blue := 0 ! 78: elseif addgreen ! 79: then d.blue := deltas[i] ! 80: d.red := deltas[j] ! 81: d.green := 0 ! 82: else d.green := deltas[i] ! 83: d.blue := deltas[j] ! 84: d.red := 0 ! 85: end ! 86: end ! 87: end ! 88: delta := 1 ! 89: x_display$store_colors(defs) ! 90: donew := false ! 91: end ! 92: while true do ! 93: x_input$deq(ev) ! 94: if ev.kind = ExposeWindow ! 95: then exit done end ! 96: if ev.value = MiddleButton ! 97: then break end ! 98: if ev.value = LeftButton cand delta > 1 ! 99: then delta := delta - 1 ! 100: elseif ev.value = RightButton cand delta < side ! 101: then delta := delta + 1 ! 102: else continue end ! 103: val: int := deltas[delta] ! 104: for d: colordef in colordeflist$elements(defs) do ! 105: if addblue ! 106: then d.blue := val ! 107: elseif addgreen ! 108: then d.green := val ! 109: else d.red := val end ! 110: end ! 111: x_display$store_colors(defs) ! 112: end ! 113: if addblue ! 114: then addblue := false ! 115: addgreen := true ! 116: elseif addgreen ! 117: then addgreen := false ! 118: addred := true ! 119: else addred := false ! 120: addblue := true ! 121: end ! 122: donew := true ! 123: end except when done: end ! 124: end ! 125: end shadesdemo
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