1 /* Dia -- an diagram creation/manipulation program
2 * Copyright (C) 1998 Alexander Larsson
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #include "handle_ops.h"
23 /* This value is best left odd so that the handles are centered. */
26 static Color handle_color
[NUM_HANDLE_TYPES
] =
28 { 0.0, 0.0, 0.4}, /* HANDLE_NON_MOVABLE */
29 { 0.0, 1.0, 0.0}, /* HANDLE_MAJOR_CONTROL */
30 { 1.0, 0.4, 0.0}, /* HANDLE_MINOR_CONTROL */
33 static Color handle_color_connected
[NUM_HANDLE_TYPES
] =
35 { 0.0, 0.0, 0.4}, /* HANDLE_NON_MOVABLE */
36 { 1.0, 0.0, 0.0}, /* HANDLE_MAJOR_CONTROL */
37 { 1.0, 0.1, 0.0}, /* HANDLE_MINOR_CONTROL */
41 handle_draw(Handle
*handle
, DDisplay
*ddisp
)
44 Renderer
*renderer
= ddisp
->renderer
;
47 ddisplay_transform_coords(ddisp
, handle
->pos
.x
, handle
->pos
.y
, &x
, &y
);
49 if (handle
->connected_to
!= NULL
) {
50 color
= &handle_color_connected
[handle
->type
];
52 color
= &handle_color
[handle
->type
];
55 (renderer
->ops
->set_linewidth
)(renderer
, 0.0);
56 (renderer
->ops
->set_linestyle
)(renderer
, LINESTYLE_SOLID
);
57 (renderer
->ops
->set_linejoin
)(renderer
, LINEJOIN_MITER
);
58 (renderer
->ops
->set_fillstyle
)(renderer
, FILLSTYLE_SOLID
);
61 (renderer
->interactive_ops
->fill_pixel_rect
)(renderer
,
62 x
- HANDLE_SIZE
/2 + 1,
63 y
- HANDLE_SIZE
/2 + 1,
64 HANDLE_SIZE
-2, HANDLE_SIZE
-2,
67 (renderer
->interactive_ops
->draw_pixel_rect
)(renderer
,
70 HANDLE_SIZE
-1, HANDLE_SIZE
-1,
75 if (handle
->connect_type
!= HANDLE_NONCONNECTABLE
) {
76 (renderer
->interactive_ops
->draw_pixel_line
)
78 x
- HANDLE_SIZE
/2, y
- HANDLE_SIZE
/2,
79 x
+ HANDLE_SIZE
/2, y
+ HANDLE_SIZE
/2,
81 (renderer
->interactive_ops
->draw_pixel_line
)
83 x
- HANDLE_SIZE
/2, y
+ HANDLE_SIZE
/2,
84 x
+ HANDLE_SIZE
/2, y
- HANDLE_SIZE
/2,
90 handle_add_update(Handle
*handle
, Diagram
*dia
)
92 diagram_add_update_pixels(dia
, &handle
->pos
,
93 HANDLE_SIZE
, HANDLE_SIZE
);
96 /* Call this after diagram_find_closest_handle() */
98 handle_is_clicked(DDisplay
*ddisp
, Handle
*handle
, Point
*pos
)
106 dx
= ABS(handle
->pos
.x
- pos
->x
);
107 dy
= ABS(handle
->pos
.y
- pos
->y
);
109 idx
= ddisplay_transform_length(ddisp
, dx
);
110 idy
= ddisplay_transform_length(ddisp
, dy
);
112 return (idx
<(HANDLE_SIZE
+1)/2) && (idy
<(HANDLE_SIZE
+1)/2);