91 lines
2.0 KiB
Lua
91 lines
2.0 KiB
Lua
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acceptance_state={
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not_grabbed=0,
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would_accept=1,
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would_not_accept=2,
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no_move=3
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}
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cursor=klass()
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function cursor:init(board)
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self.board=board
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self.hover_x=0
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self.hover_y=1
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self.grabbed=nil
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end
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function cursor:acceptance_state()
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if self.grabbed then
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local hover=self:hover_slot()
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if hover==self.grabbed then
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return acceptance_state.no_move
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end
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local source=self.board.slots[self.grabbed]
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local target=self.board.slots[self:hover_slot()]
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local card=source:peek()
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if target:would_accept(card) then
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return acceptance_state.would_accept,source,target
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else
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return acceptance_state.would_not_accept
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end
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else
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return acceptance_state.not_grabbed
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end
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end
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function cursor:toggle_grab()
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local acc,src,tar=self:acceptance_state()
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if acc==acceptance_state.not_grabbed then
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self.grabbed=self:hover_slot()
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elseif acc==acceptance_state.would_accept then
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local card=src:pop()
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tar:add(card)
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self.grabbed=nil
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self.board:on_move(card)
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elseif acc==acceptance_state.no_move or acc==acceptance_state.would_not_accept then
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self.grabbed=nil
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else
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assert(false,"invalid acceptance state")
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end
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end
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function cursor:move_x(dx)
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if (self.hover_y==0) return
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self.hover_x+=dx
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self.hover_x%=11 -- TODO: Don't hard-code
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end
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function cursor:move_y(dy)
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if (self.hover_y==0 and dy==1) self.hover_y=1
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if (self.hover_y==1 and dy==-1) self.hover_y=0
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end
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function cursor:hover_slot()
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if (self.hover_y==0) return 12
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return self.hover_x+1
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end
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function cursor:grabbed_card()
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if self.grabbed then
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local slot=self.board.slots[self.grabbed]
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return slot:peek()
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end
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return nil
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end
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function cursor:draw_at(x,y)
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local card=self:grabbed_card()
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local acc=self:acceptance_state()
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if card and acc!=acceptance_state.would_accept and acc!=acceptance_state.no_move then
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x+=sin(time()/2)*2+0.5
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y+=sin(time()/4)+0.5+1
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end
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if card then
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local card_fg=deck:draw_card(x,y,card,false)
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local fg=card_fg
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if (acc==acceptance_state.would_accept) fg=9
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if (fg) rect(x-1,y-1,x+9,y+16,fg)
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else
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rectfill(x,y,x+8,y+15,9)
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end
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end
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