Update to new mailing list - profani-tty - Profanity fork with TTY improvements

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author	Michael Vetter <jubalh@iodoru.org>	2023-03-01 15:25:41 +0100
committer	Michael Vetter <jubalh@iodoru.org>	2023-03-01 15:25:41 +0100
commit	e1d45f05d38fe10f91cad3461d86a7f0f2385dc0 (patch)
tree	1af8d75abec0d0753ee655809531c7a275aeeb76 /tests/unittests/test_keyhandlers.h
parent	4887d21a119ed67756a1544ec953aa010257bcb1 (diff)
download	profani-tty-e1d45f05d38fe10f91cad3461d86a7f0f2385dc0.tar.gz

Update to new mailing list

Maintained by https://github.com/StefanKropp

Diffstat (limited to 'tests/unittests/test_keyhandlers.h')

0 files changed, 0 insertions, 0 deletions

-- primitives for editing drawings Drawing = {} require 'drawing_tests' -- All drawings span 100% of some conceptual 'page width' and divide it up -- into 256 parts. function Drawing.draw(State, line) local pmx,pmy = App.mouse_x(), App.mouse_y() if pmx < State.right and pmy > line.y and pmy < line.y+Drawing.pixels(line.h, State.width) then App.color(Icon_color) love.graphics.rectangle('line', State.left,line.y, State.width,Drawing.pixels(line.h, State.width)) if icon[State.current_drawing_mode] then icon[State.current_drawing_mode](State.right-22, line.y+4) else icon[State.previous_drawing_mode](State.right-22, line.y+4) end if App.mouse_down(1) and love.keyboard.isDown('h') then draw_help_with_mouse_pressed(State, line) return end end if line.show_help then draw_help_without_mouse_pressed(State, line) return end local mx = Drawing.coord(pmx-State.left, State.width) local my = Drawing.coord(pmy-line.y, State.width) for _,shape in ipairs(line.shapes) do assert(shape) if geom.on_shape(mx,my, line, shape) then App.color(Focus_stroke_color) else App.color(Stroke_color) end Drawing.draw_shape(line, shape, line.y, State.left,State.right) end local function px(x) return Drawing.pixels(x, State.width)+State.left end local function py(y) return Drawing.pixels(y, State.width)+line.y end for i,p in ipairs(line.points) do if p.deleted == nil then if Drawing.near(p, mx,my, State.width) then App.color(Focus_stroke_color) love.graphics.circle('line', px(p.x),py(p.y), Same_point_distance) else App.color(Stroke_color) love.graphics.circle('fill', px(p.x),py(p.y), 2) end if p.name then -- TODO: clip local x,y = px(p.x)+5, py(p.y)+5 love.graphics.print(p.name, x,y) if State.current_drawing_mode == 'name' and i == line.pending.target_point then -- create a faint red box for the name App.color(Current_name_background_color) local name_text -- TODO: avoid computing name width on every repaint if p.name == '' then name_text = State.em else name_text = App.newText(love.graphics.getFont(), p.name) end love.graphics.rectangle('fill', x,y, App.width(name_text), State.line_height) end end end end App.color(Current_stroke_color) Drawing.draw_pending_shape(line, line.y, State.left,State.right) end function Drawing.draw_shape(drawing, shape, top, left,right) local width = right-left local function px(x) return Drawing.pixels(x, width)+left end local function py(y) return Drawing.pixels(y, width)+top end if shape.mode == 'freehand' then local prev = nil for _,point in ipairs(shape.points) do if prev then love.graphics.line(px(prev.x),py(prev.y), px(point.x),py(point.y)) end prev = point end elseif shape.mode == 'line' or shape.mode == 'manhattan' then local p1 = drawing.points[shape.p1] local p2 = drawing.points[shape.p2] love.graphics.line(px(p1.x),py(p1.y), px(p2.x),py(p2.y)) elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then local prev = nil for _,point in ipairs(shape.vertices) do local curr = drawing.points[point] if prev then love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y)) end prev = curr end -- close the loop local curr = drawing.points[shape.vertices[1]] love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y)) elseif shape.mode == 'circle' then -- TODO: clip local center = drawing.points[shape.center] love.graphics.circle('line', px(center.x),py(center.y), Drawing.pixels(shape.radius, width)) elseif shape.mode == 'arc' then local center = drawing.points[shape.center] love.graphics.arc('line', 'open', px(center.x),py(center.y), Drawing.pixels(shape.radius, width), shape.start_angle, shape.end_angle, 360) elseif shape.mode == 'deleted' then -- ignore else print(shape.mode) assert(false) end end function Drawing.draw_pending_shape(drawing, top, left,right) local width = right-left local pmx,pmy = App.mouse_x(), App.mouse_y() local function px(x) return Drawing.pixels(x, width)+left end local function py(y) return Drawing.pixels(y, width)+top end local mx = Drawing.coord(pmx-left, width) local my = Drawing.coord(pmy-top, width) local shape = drawing.pending if shape.mode == nil then -- nothing pending elseif shape.mode == 'freehand' then local shape_copy = deepcopy(shape) Drawing.smoothen(shape_copy) Drawing.draw_shape(drawing, shape_copy, top, left,right) elseif shape.mode == 'line' then if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then return end local p1 = drawing.points[shape.p1] love.graphics.line(px(p1.x),py(p1.y), pmx,pmy) elseif shape.mode == 'manhattan' then if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then return end local p1 = drawing.points[shape.p1] if math.abs(mx-p1.x) > math.abs(my-p1.y) then love.graphics.line(px(p1.x),py(p1.y), pmx, py(p1.y)) else love.graphics.line(px(p1.x),py(p1.y), px(p1.x),pmy) end elseif shape.mode == 'polygon' then -- don't close the loop on a pending polygon local prev = nil for _,point in ipairs(shape.vertices) do local curr = drawing.points[point] if prev then love.graphics.line(px(prev.x),py(prev.y), px(curr.x),py(curr.y)) end prev = curr end love.graphics.line(px(prev.x),py(prev.y), pmx,pmy) elseif shape.mode == 'rectangle' then local first = drawing.points[shape.vertices[1]] if #shape.vertices == 1 then love.graphics.line(px(first.x),py(first.y), pmx,pmy) return end local second = drawing.points[shape.vertices[2]] local thirdx,thirdy, fourthx,fourthy = Drawing.complete_rectangle(first.x,first.y, second.x,second.y, mx,my) love.graphics.line(px(first.x),py(first.y), px(second.x),py(second.y)) love.graphics.line(px(second.x),py(second.y), px(thirdx),py(thirdy)) love.graphics.line(px(thirdx),py(thirdy), px(fourthx),py(fourthy)) love.graphics.line(px(fourthx),py(fourthy), px(first.x),py(first.y)) elseif shape.mode == 'square' then local first = drawing.points[shape.vertices[1]] if #shape.vertices == 1 then love.graphics.line(px(first.x),py(first.y), pmx,pmy) return end local second = drawing.points[shape.vertices[2]] local thirdx,thirdy, fourthx,fourthy = Drawing.complete_square(first.x,first.y, second.x,second.y, mx,my) love.graphics.line(px(first.x),py(first.y), px(second.x),py(second.y)) love.graphics.line(px(second.x),py(second.y), px(thirdx),py(thirdy)) love.graphics.line(px(thirdx),py(thirdy), px(fourthx),py(fourthy)) love.graphics.line(px(fourthx),py(fourthy), px(first.x),py(first.y)) elseif shape.mode == 'circle' then local center = drawing.points[shape.center] if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then return end local cx,cy = px(center.x), py(center.y) love.graphics.circle('line', cx,cy, geom.dist(cx,cy, App.mouse_x(),App.mouse_y())) elseif shape.mode == 'arc' then local center = drawing.points[shape.center] if mx < 0 or mx >= 256 or my < 0 or my >= drawing.h then return end shape.end_angle = geom.angle_with_hint(center.x,center.y, mx,my, shape.end_angle) local cx,cy = px(center.x), py(center.y) love.graphics.arc('line', 'open', cx,cy, Drawing.pixels(shape.radius, width), shape.start_angle, shape.end_angle, 360) elseif shape.mode == 'move' then -- nothing pending; changes are immediately committed elseif shape.mode == 'name' then -- nothing pending; changes are immediately committed else print(shape.mode) assert(false) end end function Drawing.in_drawing(drawing, x,y, left,right) if drawing.y == nil then return false end -- outside current page local width = right-left return y >= drawing.y and y < drawing.y + Drawing.pixels(drawing.h, width) and x >= left and x < right end function Drawing.mouse_pressed(State, drawing, x,y, button) local cx = Drawing.coord(x-State.left, State.width) local cy = Drawing.coord(y-drawing.y, State.width) if State.current_drawing_mode == 'freehand' then drawing.pending = {mode=State.current_drawing_mode, points={{x=cx, y=cy}}} elseif State.current_drawing_mode == 'line' or State.current_drawing_mode == 'manhattan' then local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width) drawing.pending = {mode=State.current_drawing_mode, p1=j} elseif State.current_drawing_mode == 'polygon' or State.current_drawing_mode == 'rectangle' or State.current_drawing_mode == 'square' then local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width) drawing.pending = {mode=State.current_drawing_mode, vertices={j}} elseif State.current_drawing_mode == 'circle' then local j = Drawing.find_or_insert_point(drawing.points, cx, cy, State.width) drawing.pending = {mode=State.current_drawing_mode, center=j} elseif State.current_drawing_mode == 'move' then -- all the action is in mouse_released elseif State.current_drawing_mode == 'name' then -- nothing else print(State.current_drawing_mode) assert(false) end end -- a couple of operations on drawings need to constantly check the state of the mouse function Drawing.update(State) if State.lines.current_drawing == nil then return end local drawing = State.lines.current_drawing assert(drawing.mode == 'drawing') local pmx, pmy = App.mouse_x(), App.mouse_y() local mx = Drawing.coord(pmx-State.left, State.width) local my = Drawing.coord(pmy-drawing.y, State.width) if App.mouse_down(1) then if Drawing.in_drawing(drawing, pmx,pmy, State.left,State.right) then if drawing.pending.mode == 'freehand' then table.insert(drawing.pending.points, {x=mx, y=my}) elseif drawing.pending.mode == 'move' then drawing.pending.target_point.x = mx drawing.pending.target_point.y = my Drawing.relax_constraints(drawing, drawing.pending.target_point_index) end end elseif State.current_drawing_mode == 'move' then if Drawing.in_drawing(drawing, pmx, pmy, State.left,State.right) then drawing.pending.target_point.x = mx drawing.pending.target_point.y = my Drawing.relax_constraints(drawing, drawing.pending.target_point_index) end else -- do nothing end end function Drawing.relax_constraints(drawing, p) for _,shape in ipairs(drawing.shapes) do if shape.mode == 'manhattan' then if shape.p1 == p then shape.mode = 'line' elseif shape.p2 == p then shape.mode = 'line' end elseif shape.mode == 'rectangle' or shape.mode == 'square' then for _,v in ipairs(shape.vertices) do if v == p then shape.mode = 'polygon' end end end end end function Drawing.mouse_released(State, x,y, button) if State.current_drawing_mode == 'move' then State.current_drawing_mode = State.previous_drawing_mode State.previous_drawing_mode = nil if State.lines.current_drawing then State.lines.current_drawing.pending = {} State.lines.current_drawing = nil end elseif State.lines.current_drawing then local drawing = State.lines.current_drawing if drawing.pending then if drawing.pending.mode == nil then -- nothing pending elseif drawing.pending.mode == 'freehand' then -- the last point added during update is good enough Drawing.smoothen(drawing.pending) table.insert(drawing.shapes, drawing.pending) elseif drawing.pending.mode == 'line' then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, mx,my, State.width) table.insert(drawing.shapes, drawing.pending) end elseif drawing.pending.mode == 'manhattan' then local p1 = drawing.points[drawing.pending.p1] local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then if math.abs(mx-p1.x) > math.abs(my-p1.y) then drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, mx, p1.y, State.width) else drawing.pending.p2 = Drawing.find_or_insert_point(drawing.points, p1.x, my, State.width) end local p2 = drawing.points[drawing.pending.p2] App.mouse_move(State.left+Drawing.pixels(p2.x, State.width), drawing.y+Drawing.pixels(p2.y, State.width)) table.insert(drawing.shapes, drawing.pending) end elseif drawing.pending.mode == 'polygon' then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, mx,my, State.width)) table.insert(drawing.shapes, drawing.pending) end elseif drawing.pending.mode == 'rectangle' then assert(#drawing.pending.vertices <= 2) if #drawing.pending.vertices == 2 then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then local first = drawing.points[drawing.pending.vertices[1]] local second = drawing.points[drawing.pending.vertices[2]] local thirdx,thirdy, fourthx,fourthy = Drawing.complete_rectangle(first.x,first.y, second.x,second.y, mx,my) table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, thirdx,thirdy, State.width)) table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, fourthx,fourthy, State.width)) table.insert(drawing.shapes, drawing.pending) end else -- too few points; draw nothing end elseif drawing.pending.mode == 'square' then assert(#drawing.pending.vertices <= 2) if #drawing.pending.vertices == 2 then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then local first = drawing.points[drawing.pending.vertices[1]] local second = drawing.points[drawing.pending.vertices[2]] local thirdx,thirdy, fourthx,fourthy = Drawing.complete_square(first.x,first.y, second.x,second.y, mx,my) table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, thirdx,thirdy, State.width)) table.insert(drawing.pending.vertices, Drawing.find_or_insert_point(drawing.points, fourthx,fourthy, State.width)) table.insert(drawing.shapes, drawing.pending) end end elseif drawing.pending.mode == 'circle' then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then local center = drawing.points[drawing.pending.center] drawing.pending.radius = geom.dist(center.x,center.y, mx,my) table.insert(drawing.shapes, drawing.pending) end elseif drawing.pending.mode == 'arc' then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) if mx >= 0 and mx < 256 and my >= 0 and my < drawing.h then local center = drawing.points[drawing.pending.center] drawing.pending.end_angle = geom.angle_with_hint(center.x,center.y, mx,my, drawing.pending.end_angle) table.insert(drawing.shapes, drawing.pending) end elseif drawing.pending.mode == 'name' then -- drop it else print(drawing.pending.mode) assert(false) end State.lines.current_drawing.pending = {} State.lines.current_drawing = nil end end end function Drawing.keychord_pressed(State, chord) if chord == 'C-p' and not App.mouse_down(1) then State.current_drawing_mode = 'freehand' elseif App.mouse_down(1) and chord == 'l' then State.current_drawing_mode = 'line' local _,drawing = Drawing.current_drawing(State) if drawing.pending.mode == 'freehand' then drawing.pending.p1 = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width) elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then drawing.pending.p1 = drawing.pending.vertices[1] elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then drawing.pending.p1 = drawing.pending.center end drawing.pending.mode = 'line' elseif chord == 'C-l' and not App.mouse_down(1) then State.current_drawing_mode = 'line' elseif App.mouse_down(1) and chord == 'm' then State.current_drawing_mode = 'manhattan' local drawing = Drawing.select_drawing_at_mouse(State) if drawing.pending.mode == 'freehand' then drawing.pending.p1 = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width) elseif drawing.pending.mode == 'line' then -- do nothing elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then drawing.pending.p1 = drawing.pending.vertices[1] elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then drawing.pending.p1 = drawing.pending.center end drawing.pending.mode = 'manhattan' elseif chord == 'C-m' and not App.mouse_down(1) then State.current_drawing_mode = 'manhattan' elseif chord == 'C-g' and not App.mouse_down(1) then State.current_drawing_mode = 'polygon' elseif App.mouse_down(1) and chord == 'g' then State.current_drawing_mode = 'polygon' local _,drawing = Drawing.current_drawing(State) if drawing.pending.mode == 'freehand' then drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)} elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then if drawing.pending.vertices == nil then drawing.pending.vertices = {drawing.pending.p1} end elseif drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then -- reuse existing vertices elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then drawing.pending.vertices = {drawing.pending.center} end drawing.pending.mode = 'polygon' elseif chord == 'C-r' and not App.mouse_down(1) then State.current_drawing_mode = 'rectangle' elseif App.mouse_down(1) and chord == 'r' then State.current_drawing_mode = 'rectangle' local _,drawing = Drawing.current_drawing(State) if drawing.pending.mode == 'freehand' then drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)} elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then if drawing.pending.vertices == nil then drawing.pending.vertices = {drawing.pending.p1} end elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'square' then -- reuse existing (1-2) vertices elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then drawing.pending.vertices = {drawing.pending.center} end drawing.pending.mode = 'rectangle' elseif chord == 'C-s' and not App.mouse_down(1) then State.current_drawing_mode = 'square' elseif App.mouse_down(1) and chord == 's' then State.current_drawing_mode = 'square' local _,drawing = Drawing.current_drawing(State) if drawing.pending.mode == 'freehand' then drawing.pending.vertices = {Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width)} elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then if drawing.pending.vertices == nil then drawing.pending.vertices = {drawing.pending.p1} end elseif drawing.pending.mode == 'polygon' then while #drawing.pending.vertices > 2 do table.remove(drawing.pending.vertices) end elseif drawing.pending.mode == 'rectangle' then -- reuse existing (1-2) vertices elseif drawing.pending.mode == 'circle' or drawing.pending.mode == 'arc' then drawing.pending.vertices = {drawing.pending.center} end drawing.pending.mode = 'square' elseif App.mouse_down(1) and chord == 'p' and State.current_drawing_mode == 'polygon' then local _,drawing = Drawing.current_drawing(State) local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-drawing.y, State.width) local j = Drawing.find_or_insert_point(drawing.points, mx,my, State.width) table.insert(drawing.pending.vertices, j) elseif App.mouse_down(1) and chord == 'p' and (State.current_drawing_mode == 'rectangle' or State.current_drawing_mode == 'square') then local _,drawing = Drawing.current_drawing(State) local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-drawing.y, State.width) local j = Drawing.find_or_insert_point(drawing.points, mx,my, State.width) while #drawing.pending.vertices >= 2 do table.remove(drawing.pending.vertices) end table.insert(drawing.pending.vertices, j) elseif chord == 'C-o' and not App.mouse_down(1) then State.current_drawing_mode = 'circle' elseif App.mouse_down(1) and chord == 'a' and State.current_drawing_mode == 'circle' then local _,drawing = Drawing.current_drawing(State) drawing.pending.mode = 'arc' local mx,my = Drawing.coord(App.mouse_x()-State.left, State.width), Drawing.coord(App.mouse_y()-drawing.y, State.width) local center = drawing.points[drawing.pending.center] drawing.pending.radius = geom.dist(center.x,center.y, mx,my) drawing.pending.start_angle = geom.angle(center.x,center.y, mx,my) elseif App.mouse_down(1) and chord == 'o' then State.current_drawing_mode = 'circle' local _,drawing = Drawing.current_drawing(State) if drawing.pending.mode == 'freehand' then drawing.pending.center = Drawing.find_or_insert_point(drawing.points, drawing.pending.points[1].x, drawing.pending.points[1].y, State.width) elseif drawing.pending.mode == 'line' or drawing.pending.mode == 'manhattan' then drawing.pending.center = drawing.pending.p1 elseif drawing.pending.mode == 'polygon' or drawing.pending.mode == 'rectangle' or drawing.pending.mode == 'square' then drawing.pending.center = drawing.pending.vertices[1] end drawing.pending.mode = 'circle' elseif chord == 'C-u' and not App.mouse_down(1) then local drawing_index,drawing,i,p = Drawing.select_point_at_mouse(State) if drawing then if State.previous_drawing_mode == nil then State.previous_drawing_mode = State.current_drawing_mode end State.current_drawing_mode = 'move' drawing.pending = {mode=State.current_drawing_mode, target_point=p, target_point_index=i} State.lines.current_drawing_index = drawing_index State.lines.current_drawing = drawing end elseif chord == 'C-n' and not App.mouse_down(1) then local drawing_index,drawing,point_index,p = Drawing.select_point_at_mouse(State) if drawing then if State.previous_drawing_mode == nil then -- don't clobber State.previous_drawing_mode = State.current_drawing_mode end State.current_drawing_mode = 'name' p.name = '' drawing.pending = {mode=State.current_drawing_mode, target_point=point_index} State.lines.current_drawing_index = drawing_index State.lines.current_drawing = drawing end elseif chord == 'C-d' and not App.mouse_down(1) then local _,drawing,i,p = Drawing.select_point_at_mouse(State) if drawing then for _,shape in ipairs(drawing.shapes) do if Drawing.contains_point(shape, i) then if shape.mode == 'polygon' then local idx = table.find(shape.vertices, i) assert(idx) table.remove(shape.vertices, idx) if #shape.vertices < 3 then shape.mode = 'deleted' end else shape.mode = 'deleted' end end end drawing.points[i].deleted = true end local drawing,_,shape = Drawing.select_shape_at_mouse(State) if drawing then shape.mode = 'deleted' end elseif chord == 'C-h' and not App.mouse_down(1) then local drawing = Drawing.select_drawing_at_mouse(State) if drawing then drawing.show_help = true end elseif chord == 'escape' and App.mouse_down(1) then local _,drawing = Drawing.current_drawing(State) drawing.pending = {} end end function Drawing.complete_rectangle(firstx,firsty, secondx,secondy, x,y) if firstx == secondx then return x,secondy, x,firsty end if firsty == secondy then return secondx,y, firstx,y end local first_slope = (secondy-firsty)/(secondx-firstx) -- slope of second edge: -- -1/first_slope -- equation of line containing the second edge: -- y-secondy = -1/first_slope*(x-secondx) -- => 1/first_slope*x + y + (- secondy - secondx/first_slope) = 0 -- now we want to find the point on this line that's closest to the mouse pointer. -- https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line#Line_defined_by_an_equation local a = 1/first_slope local c = -secondy - secondx/first_slope local thirdx = ((x-a*y) - a*c) / (a*a + 1) local thirdy = (a*(-x + a*y) - c) / (a*a + 1) -- slope of third edge = first_slope -- equation of line containing third edge: -- y - thirdy = first_slope*(x-thirdx) -- => -first_slope*x + y + (-thirdy + thirdx*first_slope) = 0 -- now we want to find the point on this line that's closest to the first point local a = -first_slope local c = -thirdy + thirdx*first_slope local fourthx = ((firstx-a*firsty) - a*c) / (a*a + 1) local fourthy = (a*(-firstx + a*firsty) - c) / (a*a + 1) return thirdx,thirdy, fourthx,fourthy end function Drawing.complete_square(firstx,firsty, secondx,secondy, x,y) -- use x,y only to decide which side of the first edge to complete the square on local deltax = secondx-firstx local deltay = secondy-firsty local thirdx = secondx+deltay local thirdy = secondy-deltax if not geom.same_side(firstx,firsty, secondx,secondy, thirdx,thirdy, x,y) then deltax = -deltax deltay = -deltay thirdx = secondx+deltay thirdy = secondy-deltax end local fourthx = firstx+deltay local fourthy = firsty-deltax return thirdx,thirdy, fourthx,fourthy end function Drawing.current_drawing(State) local x, y = App.mouse_x(), App.mouse_y() for drawing_index,drawing in ipairs(State.lines) do if drawing.mode == 'drawing' then if Drawing.in_drawing(drawing, x,y, State.left,State.right) then return drawing_index,drawing end end end return nil end function Drawing.select_shape_at_mouse(State) for _,drawing in ipairs(State.lines) do if drawing.mode == 'drawing' then local x, y = App.mouse_x(), App.mouse_y() if Drawing.in_drawing(drawing, x,y, State.left,State.right) then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) for i,shape in ipairs(drawing.shapes) do assert(shape) if geom.on_shape(mx,my, drawing, shape) then return drawing,i,shape end end end end end end function Drawing.select_point_at_mouse(State) for drawing_index,drawing in ipairs(State.lines) do if drawing.mode == 'drawing' then local x, y = App.mouse_x(), App.mouse_y() if Drawing.in_drawing(drawing, x,y, State.left,State.right) then local mx,my = Drawing.coord(x-State.left, State.width), Drawing.coord(y-drawing.y, State.width) for i,point in ipairs(drawing.points) do assert(point) if Drawing.near(point, mx,my, State.width) then return drawing_index,drawing,i,point end end end end end end function Drawing.select_drawing_at_mouse(State) for _,drawing in ipairs(State.lines) do if drawing.mode == 'drawing' then local x, y = App.mouse_x(), App.mouse_y() if Drawing.in_drawing(drawing, x,y, State.left,State.right) then return drawing end end end end function Drawing.contains_point(shape, p) if shape.mode == 'freehand' then -- not supported elseif shape.mode == 'line' or shape.mode == 'manhattan' then return shape.p1 == p or shape.p2 == p elseif shape.mode == 'polygon' or shape.mode == 'rectangle' or shape.mode == 'square' then return table.find(shape.vertices, p) elseif shape.mode == 'circle' then return shape.center == p elseif shape.mode == 'arc' then return shape.center == p -- ugh, how to support angles elseif shape.mode == 'deleted' then -- already done else print(shape.mode) assert(false) end end function Drawing.smoothen(shape) assert(shape.mode == 'freehand') for _=1,7 do for i=2,#shape.points-1 do local a = shape.points[i-1] local b = shape.points[i] local c = shape.points[i+1] b.x = (a.x + b.x + c.x)/3 b.y = (a.y + b.y + c.y)/3 end end end function Drawing.insert_point(points, x,y) table.insert(points, {x=x, y=y}) return #points end function Drawing.find_or_insert_point(points, x,y, width) -- check if UI would snap the two points together for i,point in ipairs(points) do if Drawing.near(point, x,y, width) then return i end end table.insert(points, {x=x, y=y}) return #points end function Drawing.near(point, x,y, width) local px,py = Drawing.pixels(x, width),Drawing.pixels(y, width) local cx,cy = Drawing.pixels(point.x, width), Drawing.pixels(point.y, width) return (cx-px)*(cx-px) + (cy-py)*(cy-py) < Same_point_distance*Same_point_distance end function Drawing.pixels(n, width) -- parts to pixels return math.floor(n*width/256) end function Drawing.coord(n, width) -- pixels to parts return math.floor(n*256/width) end function table.find(h, x) for k,v in pairs(h) do if v == x then return k end end end


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