tv_pb.erl

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%% Three cases: no button previously clicked, or same button clicked,
%% or some other button clicked.

check_marked_row(NewVirtRow, undefined, RealRow, RowMarkP) ->
       % No btn already pressed!
    {true, RowMarkP#row_mark_params{virtual_row_marked = NewVirtRow,
				    real_row_marked    = RealRow}};
check_marked_row(NewVirtRow, OldVirtRow, _RealRow, RowMarkP) when NewVirtRow =:= OldVirtRow ->
       % The button previously pressed has been pressed again!
    {false, RowMarkP#row_mark_params{virtual_row_marked = undefined,
				     real_row_marked    = undefined}};
check_marked_row(NewVirtRow, _OldVirtRow, RealRow, RowMarkP) ->
       % A new btn has been pressed!
    {true, RowMarkP#row_mark_params{virtual_row_marked = NewVirtRow,
				    real_row_marked    = RealRow}}.












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set_sort_col(Msg, ProcVars) ->
    #pb_set_sort_col{virtual_col = SortCol} = Msg,
    tv_pb_funcs:set_new_sort_col(SortCol, ProcVars).
    






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%% Three cases: no button previously clicked, or same button clicked,
%% or some other button clicked.

mark_col_btn(NewId, undefined, NewVirtCol, _OldVirtCol, _RealCol, _SortCol, ColMarkP) ->
       % No btn already pressed!
    gs:config(NewId, [{bg, ?COL_MARK_COLOR},
		      {fg, {255, 255, 255}}
		     ]),
    {true, ColMarkP#col_mark_params{col_btn_id         = NewId,
				    virtual_col_marked = NewVirtCol}};
mark_col_btn(NewId, _OldId, NewVirtCol, OldVirtCol, _RealCol, SortCol, ColMarkP) when NewVirtCol =:= OldVirtCol, NewVirtCol =:= SortCol ->
       % The button previously pressed has been pressed again!
    gs:config(NewId, [{bg, ?SORT_MARK_COLOR},
		      {fg, {0, 0, 0}}
		     ]),
    {false, ColMarkP#col_mark_params{col_btn_id         = undefined,
				     virtual_col_marked = undefined}};
mark_col_btn(NewId, _OldId, NewVirtCol, OldVirtCol, _RealCol, _SortCol, ColMarkP) when NewVirtCol =:= OldVirtCol ->
       % The button previously pressed has been pressed again!
    gs:config(NewId, [{bg, ?DEFAULT_BG_COLOR},
		      {fg, {0, 0, 0}}
		     ]),
    {false, ColMarkP#col_mark_params{col_btn_id         = undefined,
				     virtual_col_marked = undefined}};
mark_col_btn(NewId, OldId, NewVirtCol, _OldVirtCol, _RealCol, _SortCol, ColMarkP) ->
       % A new btn has been pressed!
    gs:config(OldId, [{bg, ?DEFAULT_BG_COLOR},
			 {fg, {0, 0, 0}}
			]),
    gs:config(NewId, [{bg, ?COL_MARK_COLOR},
		      {fg, {255, 255, 255}}
		     ]),
    {true, ColMarkP#col_mark_params{col_btn_id         = NewId,
				    virtual_col_marked = NewVirtCol}}.
    		    
		    
	    
	    
    
    





%%======================================================================
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handle_col_resizing(RbtnId, RealCol, VirtualCol, Xpos, ProcVars) ->
    gs:config(RbtnId, [{motion, true}]),
    #process_variables{parent_pid        = ParentPid,
		       grid_frame_id     = GrFrId,
		       grid_frame_height = Height,
		       hbtn_height       = HbtnH,
		       resbtn_width      = RbtnW,
		       cols_shown        = ColsShown} = ProcVars,
    
    LineId = gs:frame(GrFrId, [{width, 1},
			       {height, Height - HbtnH},
			       {x, Xpos},
			       {y, HbtnH - 1},
			       {bg, ?DEFAULT_BG_COLOR}
			      ]),
    MinColWidth = RbtnW,
    
    OldColWidth = lists:nth(RealCol, ColsShown),
    Xdiff = get_xdiff(RbtnId, 1, 0, LineId, Xpos, MinColWidth - OldColWidth),

    ParentPid ! #pb_new_colwidth{sender      = self(),
				 real_col    = RealCol,
				 virtual_col = VirtualCol,
				 xdiff       = Xdiff},

    gs:config(RbtnId, [{motion, false}]),
    gs:destroy(LineId).


    









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get_xdiff(Id, Btn, LastXdiff, LineId, LineXpos, MinAllowedXdiff) ->
    receive
	{gs, Id, motion, {resbtn, _RealCol, _VirtCol, _OldXpos}, [NewXdiff | _T]} ->
	    UsedXdiff = max(MinAllowedXdiff, NewXdiff),
	    gs:config(LineId, [{x, LineXpos + UsedXdiff}]),
	    get_xdiff(Id, Btn, UsedXdiff, LineId, LineXpos, MinAllowedXdiff);
	{gs, Id, buttonrelease, _Data, [Btn | _T]} ->
	    LastXdiff;
	{gs, Id, buttonrelease, _Data, _Args} ->
	    get_xdiff(Id, Btn, LastXdiff, LineId, LineXpos, MinAllowedXdiff);
	{gs, Id, buttonpress, _Data, _Args} ->
	    get_xdiff(Id, Btn, LastXdiff, LineId, LineXpos, MinAllowedXdiff)
    end.











%%======================================================================
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init_btns(Msg, ProcVars) ->
    #pb_init_btns{parent_id       = ParentId,
		  parent_width    = Width,
		  parent_height   = Height,
		  ypos            = Ypos,
		  hbtn_height     = HbtnH,
		  resbtn_width    = RbtnW,
		  vbtn_width      = VbtnW,
		  nof_rows        = NofRows,
		  row_height      = RowHeight,
		  first_col_shown = FirstColShown,
		  cols_shown      = ColsShown} = Msg,

    NewProcVars = tv_pb_funcs:init_btns(ParentId, Ypos, HbtnH, VbtnW, RbtnW, 
					 FirstColShown, ColsShown, NofRows, 
					 RowHeight, ProcVars),

    gs:frame(ParentId, [{bg, {0, 0, 0}},
			{bw, 0},
			{width, 1300},
			{height, 1},
			{x, 0},
			{y, Ypos - 1}
		       ]),
    NewProcVars#process_variables{grid_frame_width  = Width,
				  grid_frame_height = Height
				 }.








%%======================================================================
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update_hbtns(Msg, ProcVars) ->
    #pb_update_hbtns{parent_width    = Width,
		     parent_height   = Height,
		     first_col_shown = FirstColShown,
		     cols_shown      = ColsShown} = Msg,

    NewProcVars = tv_pb_funcs:update_hbtns(FirstColShown, ColsShown, ProcVars),

    NewProcVars#process_variables{grid_frame_width  = Width,
				  grid_frame_height = Height
				 }.








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update_vbtns(Msg, ProcVars) ->
    #pb_update_vbtns{color_list       = Colors,
		     first_row_shown  = FirstRowShown,
		     nof_rows_shown   = NofRowsShown,
		     blinking_enabled = BlinkEnabled} = Msg,
    
    tv_pb_funcs:update_vbtns(NofRowsShown, FirstRowShown, Colors, BlinkEnabled, 
			      ProcVars).
    





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update_keys(Msg, ProcVars) ->
    #pb_key_info{list_of_keys = KeyList} = Msg,
    tv_pb_funcs:update_keys(KeyList, ProcVars).








%%======================================================================
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max(A, B) when A >= B ->
    A;
max(_, B) ->
    B.