--- /dev/null
+open Gdk
+open Gtk
+open GObj
+open GMain
+
+let dnd_source_window () =
+ let window = GWindow.window ~position:`MOUSE () in
+ let vbx = GPack.vbox ~border_width:10 ~packing:window#add ()
+ in
+ let evb = GBin.event_box ~border_width:0 ~packing:vbx#add () in
+ let frm = GBin.frame ~shadow_type:`OUT ~packing:evb#add () in
+ let lbl = GMisc.label ~text:"hello" ~packing:frm#add () in
+ let lbl2 = GMisc.label ~text:"drag from here!" ~packing:vbx#add () in
+ let targets = [ { target = "STRING"; flags = []; info = 0} ] in
+ begin
+ window#show ();
+ evb#drag#source_set targets ~modi:[`BUTTON1] ~actions:[`COPY];
+ evb#drag#connect#data_get ~callback: begin
+ fun _ data ~info ~time:_ ->
+ data#set ~typ:data#target ~format:0 ~data:"hello! "
+ end
+ end
+
+let corner_width = 7
+let corner_height = 7
+
+type drag_action_type =
+ GB_DRAG_NONE
+ | GB_MIDDLE
+ | GB_TOP
+ | GB_BOTTOM
+ | GB_LEFT
+ | GB_RIGHT
+ | GB_TOP_LEFT
+ | GB_TOP_RIGHT
+ | GB_BOTTOM_LEFT
+ | GB_BOTTOM_RIGHT
+
+let get_position_in_widget w ~x ~y ~width ~height =
+ if (x <= corner_width) then
+ if (y <= corner_height) then
+ GB_TOP_LEFT
+ else if (y >= height-corner_width) then
+ GB_BOTTOM_LEFT
+ else GB_LEFT
+ else if (x >= width-corner_width) then
+ if (y <= corner_height) then
+ GB_TOP_RIGHT
+ else if (y >= height-corner_width) then
+ GB_BOTTOM_RIGHT
+ else GB_RIGHT
+ else if (y <= corner_height) then
+ GB_TOP
+ else if (y >= height-corner_width) then
+ GB_BOTTOM
+ else GB_MIDDLE
+
+class drag_info = object
+ val mutable drag_action = GB_DRAG_NONE
+ val mutable drag_offset = (0, 0)
+ val mutable toimen = (0, 0)
+ val mutable drag_widget = None
+ method drag_action = drag_action
+ method drag_offset = drag_offset
+ method toimen = toimen (* coord. of opposite corner *)
+ method set_drag_widget (w : GObj.widget) = begin
+ match drag_widget with
+ None -> begin
+ GMain.Grab.add w;
+ drag_widget <- Some w;
+ ()
+ end
+ | Some w -> ()
+ end
+ method unset_drag_widget () = begin
+ match drag_widget with
+ Some w -> begin
+ GMain.Grab.remove w;
+ drag_widget <- None;
+ ()
+ end
+ | None -> ()
+ end
+ method set_drag_offset ~x ~y = drag_offset <- (x, y)
+ method set_drag_action (w : Gdk.window) ~x ~y =
+ begin
+ let (x0, y0) = Window.get_position w in
+ let (width, height) = Window.get_size w in
+ drag_action <- get_position_in_widget w ~x ~y ~width ~height;
+ let (x1, y1) = (x0+width, y0+height) in
+ toimen <-
+ match drag_action with
+ GB_TOP_LEFT -> (x1, y1)
+ | GB_BOTTOM_LEFT -> (x1, y0)
+ | GB_TOP_RIGHT -> (x0, y1)
+ | GB_BOTTOM_RIGHT -> (x0, y0)
+ | GB_TOP -> (x0, y1)
+ | GB_BOTTOM -> (x0, y0)
+ | GB_LEFT -> (x1, y0)
+ | GB_RIGHT -> (x0, y0)
+ | _ -> (-1, -1)
+ end
+ method unset_drag_action () = drag_action <- GB_DRAG_NONE
+end
+
+
+let to_grid g x = x - (x mod g)
+
+let to_grid2 g (x, y) = (to_grid g x, to_grid g y)
+
+class fix_editor ~width ~height ~packing =
+ let info = new drag_info in
+ let fix = GPack.fixed ~width ~height ~packing () in
+ let _ = fix#misc#realize () in
+ let fix_window = fix#misc#window in
+ let fix_drawing = new GDraw.drawable fix_window in
+
+ object (self)
+ inherit GObj.widget fix#as_widget
+ val mutable grid = 1
+ method set_grid g =
+ if (grid != g) then begin
+ let pix =
+ GDraw.pixmap ~window:fix ~width:g ~height:g ~mask:true () in
+ let c = fix#misc#style#bg `NORMAL in
+ pix#set_foreground (`COLOR c);
+ pix#rectangle ~filled:true ~x:0 ~y:0 ~width:g ~height:g ();
+ pix#set_foreground `BLACK;
+ pix#point ~x:0 ~y:0;
+ Gdk.Window.set_back_pixmap (fix#misc#window) (`PIXMAP pix#pixmap)
+ end;
+ grid <- g
+
+ method new_child ~name ~x ~y ~width ~height ~callback =
+ let evb = GBin.event_box ~border_width:0 ~packing:fix#add () in
+ let lbl = GMisc.label ~text:name ~width ~height ~packing:evb#add () in
+ evb#misc#realize ();
+ evb#misc#set_geometry ~x ~y ();
+ self#connect_signals ~ebox:evb ~widget:lbl#coerce ~callback;
+ ()
+
+ method private connect_signals
+ ~ebox:(ebox : GBin.event_box) ~widget:(widget : widget) ~callback:cbfun =
+ let drawing = new GDraw.drawable (ebox#misc#window) in
+ let draw_id = ref None in
+ let exps_id = ref None in
+ let on_paint _ =
+ let (width, height) = Window.get_size (ebox#misc#window) in begin
+ drawing#set_foreground `BLACK;
+ drawing#rectangle ~filled:true ~x:0 ~y:0
+ ~width:corner_width ~height:corner_height ();
+ drawing#rectangle ~filled:true ~x:(width-corner_width) ~y:0
+ ~width:corner_width ~height:corner_height ();
+ drawing#rectangle ~filled:true
+ ~x:(width-corner_width)
+ ~y:(height-corner_height)
+ ~width:corner_width ~height:corner_height ();
+ drawing#rectangle ~filled:true
+ ~x:0
+ ~y:(height-corner_height)
+ ~width:corner_width ~height:corner_height ();
+ drawing#rectangle ~filled:false
+ ~x:0 ~y:0 ~width:(width-1) ~height:(height-1) ();
+ end
+ in
+ ebox#event#connect#button_press ~callback:
+ begin fun ev ->
+ let bx = int_of_float (GdkEvent.Button.x ev) in
+ let by = int_of_float (GdkEvent.Button.y ev) in
+ info#set_drag_action (ebox#misc#window) ~x:bx ~y:by;
+ info#set_drag_offset ~x:bx ~y:by;
+ true
+ end;
+ ebox#event#connect#motion_notify ~callback:
+ begin fun ev ->
+ info#set_drag_widget ebox#coerce;
+ let action = info#drag_action in
+ let (mx, my) = fix#misc#pointer in
+ let (ox, oy) = info#drag_offset in
+ begin match action with
+ GB_MIDDLE ->
+ let (nx, ny) = to_grid2 grid (mx-ox, my-oy) in
+ ebox#misc#set_geometry ~x:nx ~y:ny ();
+ if cbfun ~x:nx ~y:ny ~width:(-2) ~height:(-2) then
+ ()
+ else (* should we undo ? *) ()
+ | GB_DRAG_NONE -> () (* do nothing *)
+ | GB_TOP_LEFT | GB_BOTTOM_LEFT
+ | GB_TOP_RIGHT | GB_BOTTOM_RIGHT ->
+ let (toi_x, toi_y) = info#toimen in
+ let (mx, my) = to_grid2 grid (mx, my) in
+ let (lx, rx) =
+ if mx<toi_x then (mx, toi_x) else (toi_x, mx) in
+ let (ty, by) =
+ if my<toi_y then (my, toi_y) else (toi_y, my) in
+ let (w, h) = (rx-lx, by-ty) in
+ ebox#misc#set_geometry ~x:lx ~y:ty ~width:w ~height:h ();
+ if cbfun ~x:lx ~y:ty ~width:w ~height:h then
+ ()
+ else (* should we undo ? *) ()
+ | GB_TOP | GB_BOTTOM ->
+ let (lx, toi_y) = info#toimen in
+ let my = to_grid grid my in
+ let (ty, by) = if my<toi_y then (my, toi_y) else (toi_y, my) in
+ let h = by-ty in
+ ebox#misc#set_geometry ~y:ty ~height:h ();
+ if cbfun ~x:lx ~y:ty ~width:(-2) ~height:h then
+ ()
+ else (* should we undo ? *) ()
+ | GB_LEFT | GB_RIGHT ->
+ let (toi_x, ty) = info#toimen in
+ let mx = to_grid grid mx in
+ let (lx, rx) = if mx<toi_x then (mx, toi_x) else (toi_x, mx) in
+ let w = rx-lx in
+ ebox#misc#set_geometry ~x:lx ~width:w ();
+ if cbfun ~x:lx ~y:ty ~width:w ~height:(-2) then
+ ()
+ else (* should we undo ? *) ()
+ end;
+ true
+ end;
+ ebox#event#connect#button_release ~callback:
+ begin fun ev ->
+ info#unset_drag_action ();
+ info#unset_drag_widget ();
+ true
+ end;
+ exps_id := Some (ebox#event#connect#after#expose
+ ~callback:(fun _ -> on_paint(); false));
+ draw_id := Some (ebox#misc#connect#draw ~callback:on_paint);
+ ()
+ initializer
+ fix#drag#dest_set ~actions:[`COPY]
+ [ { target = "STRING"; flags = []; info = 0} ];
+ fix#drag#connect#data_received ~callback: begin
+ fun context ~x ~y data ~info ~time ->
+ let name = data#data in
+ let _ = self#new_child ~name ~x ~y ~width:32 ~height:32
+ ~callback:(fun ~x ~y ~width ~height -> true) in
+(* Printf.printf "%s %d %d\n" (data#data) x y;
+ flush stdout; *)
+ context#finish ~success:true ~del:false ~time;
+ end;
+ ()
+ end
+
+(* the following is for test only *)
+let window1 () =
+ let window = GWindow.window () in
+ let _ = window#connect#destroy ~callback: Main.quit in
+ let fix = new fix_editor ~width:640 ~height:480 ~packing:window#add in
+ fix#set_grid 5;
+ let setter = fix#new_child ~name:"hello" ~x:100 ~y:200 ~width:32 ~height:32
+ ~callback:begin fun ~x ~y ~width ~height ->
+ (* Printf.printf "name=%s, x=%d, y=%d, width=%d, height=%d\n"
+ "hello" x y width height;
+ flush stdout; *)
+ true
+ end in
+ window#show ();
+ ()
+
+
+
+let main () =
+ window1 ();
+ dnd_source_window ();
+ Main.main ()
+
+let _ = main ()
+
+(* Todo
+
+ change mouse cursor
+ resize fixed itself
+ remove_child
+ (drag and) drop
+
+*)
projects / helm.git / blobdiff