trunk/src/osm-gps-map-osd-classic.c

/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -*- */
/* vim:set et sw=4 ts=4 cino=t0,(0: */
/*
 * Copyright (C) Till Harbaum 2009 <till@harbaum.org>
 *
 * osm-gps-map is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * osm-gps-map is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "config.h" 
#include <stdlib.h>  // abs
#include <math.h>    // M_PI

/* parameters that can be overwritten from the config file: */
/* OSM_GPS_MAP_OSD_DIAMETER */

#ifndef USE_CAIRO
#error "OSD control display lacks a non-cairo implementation!"
#endif

#include <cairo.h>

#include "osm-gps-map.h"
#include "osm-gps-map-osd-classic.h"

//the osd controls
typedef struct {
    /* the offscreen representation of the OSD */
    cairo_surface_t *overlay;

    GdkColor bg, fg, da;

} osd_priv_t;

/* position and extent of bounding box */
#define OSD_X      (10)
#define OSD_Y      (10)

/* parameters of the direction shape */
#ifndef OSM_GPS_MAP_OSD_DIAMETER
#define D_RAD  (30)         // diameter of dpad
#else
#define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)
#endif
#define D_TIP  (4*D_RAD/5)  // distance of arrow tip from dpad center
#define D_LEN  (D_RAD/4)    // length of arrow
#define D_WID  (D_LEN)      // width of arrow

/* parameters of the "zoom" pad */
#define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
#define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar

#ifdef OSD_SHADOW_ENABLE
/* shadow also depends on control size */
#define OSD_SHADOW (D_RAD/6)
#else
#define OSD_SHADOW (0)
#endif

/* total width and height of controls incl. shadow */
#define OSD_W    (2*D_RAD + OSD_SHADOW)
#define OSD_H    (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW)

#ifdef OSD_SHADOW_ENABLE
#define OSD_LBL_SHADOW (OSD_SHADOW/2)
#endif

#define Z_TOP    (2 * D_RAD + Z_STEP)
#define Z_MID    (Z_TOP + Z_RAD)
#define Z_BOT    (Z_MID + Z_RAD)
#define Z_LEFT   (Z_RAD)
#define Z_RIGHT  (2 * D_RAD - Z_RAD)


/* create the cairo shape used for the zoom buttons */
static void 
osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y) 
{
    cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
    cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);
    cairo_arc     (cr, x+Z_RIGHT,   y+Z_MID, Z_RAD, -M_PI/2,  M_PI/2);
    cairo_line_to (cr, x+Z_LEFT,    y+Z_BOT);
    cairo_arc     (cr, x+Z_LEFT,    y+Z_MID, Z_RAD,  M_PI/2, -M_PI/2);
}

/* create the cairo shape used for the dpad */
static void 
osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y) 
{
    cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);
}

static gboolean
osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad) 
{
    return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
}

/* check whether x/y is within the dpad */
static osd_button_t
osm_gps_map_osd_check_dpad(gint x, gint y) 
{
    /* within entire dpad circle */
    if( osm_gps_map_in_circle(x, y, OSD_X + D_RAD, OSD_Y + D_RAD, D_RAD)) 
    {
        /* convert into position relative to dpads centre */
        x -= (OSD_X + D_RAD);
        y -= (OSD_Y + D_RAD);

        /* check for dpad center goes here! */
        if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3)) 
            return OSD_GPS;

        if( y < 0 && abs(x) < abs(y))
            return OSD_UP;

        if( y > 0 && abs(x) < abs(y))
            return OSD_DOWN;

        if( x < 0 && abs(y) < abs(x))
            return OSD_LEFT;

        if( x > 0 && abs(y) < abs(x))
            return OSD_RIGHT;

        return OSD_BG;
    }
    return OSD_NONE;
}

/* check whether x/y is within the zoom pads */
static osd_button_t
osm_gps_map_osd_check_zoom(gint x, gint y) {
    if( x > OSD_X && x < (OSD_X + OSD_W) && y > Z_TOP && y < (OSD_Y+Z_BOT)) {

        /* within circle around (-) label */
        if( osm_gps_map_in_circle(x, y, OSD_X + Z_LEFT, OSD_Y + Z_MID, Z_RAD)) 
            return OSD_OUT;

        /* between center of (-) button and center of entire zoom control area */
        if(x > OSD_LEFT && x < OSD_X + D_RAD) 
            return OSD_OUT;

        /* within circle around (+) label */
        if( osm_gps_map_in_circle(x, y, OSD_X + Z_RIGHT, OSD_Y + Z_MID, Z_RAD)) 
            return OSD_IN;

        /* between center of (+) button and center of entire zoom control area */
        if(x < OSD_RIGHT && x > OSD_X + D_RAD) 
            return OSD_IN;
    }
 
    return OSD_NONE;
}

static osd_button_t
osm_gps_map_osd_check(gint x, gint y) {
    osd_button_t but = OSD_NONE;

    /* first do a rough test for the OSD area. */
    /* this is just to avoid an unnecessary detailed test */
    if(x > OSD_X && x < OSD_X + OSD_W && 
       y > OSD_Y && y < OSD_Y + OSD_H) {
        but = osm_gps_map_osd_check_dpad(x, y);

        if(but == OSD_NONE) 
            but = osm_gps_map_osd_check_zoom(x, y);
    }

    return but;
}

#ifdef OSD_SHADOW_ENABLE
static void 
osm_gps_map_osd_shape_shadow(cairo_t *cr) {
    cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
    cairo_fill (cr);
    cairo_stroke (cr);
}
#endif

#ifndef OSD_COLOR
/* if no color has been specified we just use the gdks default colors */
static void 
osm_gps_map_osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
    gdk_cairo_set_source_color(cr, bg);
    cairo_fill_preserve (cr);
    gdk_cairo_set_source_color(cr, fg);
    cairo_set_line_width (cr, 1);
    cairo_stroke (cr);
}
#else
static void 
osm_gps_map_osd_shape(cairo_t *cr) {
    cairo_set_source_rgb (cr, OSD_COLOR_BG);
    cairo_fill_preserve (cr);
    cairo_set_source_rgb (cr, OSD_COLOR);
    cairo_set_line_width (cr, 1);
    cairo_stroke (cr);
}
#endif

static void
osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {
    /* move reference to dpad center */
    x += D_RAD;
    y += D_RAD;

    const static gint offset[][3][2] = {
        /* left arrow/triangle */
        { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
        /* right arrow/triangle */
        { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
        /* top arrow/triangle */
        { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
        /* bottom arrow/triangle */
        { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
    };

    int i;
    for(i=0;i<4;i++) {
        cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
        cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
        cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
    }
}

/* draw the sattelite dish icon in the center of the dpad */
#define GPS_V0  (D_RAD/8)
#define GPS_V1  (D_RAD/10)
#define GPS_V2  (D_RAD/5)

/* draw a satellite receiver dish */
static void
osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {
    /* move reference to dpad center */
    x += D_RAD;
    y += D_RAD + GPS_V0;

    cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
    cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
    cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
    cairo_close_path (cr);

    cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
    cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
    cairo_close_path (cr);

    x += GPS_V1;
    cairo_move_to (cr, x, y-GPS_V2);
    cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
}

#define Z_LEN  (2*Z_RAD/3)

static void
osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {
    cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
    cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);

    cairo_move_to (cr, x + Z_RIGHT,         y + Z_MID - Z_LEN);
    cairo_line_to (cr, x + Z_RIGHT,         y + Z_MID + Z_LEN);
    cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
    cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
}

#ifndef OSD_COLOR
/* if no color has been specified we just use the gdks default colors */
static void
osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled,
                       GdkColor *fg, GdkColor *disabled) {
    if(enabled)  gdk_cairo_set_source_color(cr, fg);
    else         gdk_cairo_set_source_color(cr, disabled);
    cairo_set_line_width (cr, width);
    cairo_stroke (cr);
}
#else
static void
osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {
    if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
    else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
    cairo_set_line_width (cr, width);
    cairo_stroke (cr);
}
#endif

#ifdef OSD_SHADOW_ENABLE
static void 
osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
    cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
    cairo_set_line_width (cr, width);
    cairo_stroke (cr);
}
#endif

static void
osm_gps_map_osd_render(osm_gps_map_osd_t *osd) {
    osd_priv_t *priv = (osd_priv_t*)osd->priv; 

    /* first fill with transparency */
    cairo_t *cr = cairo_create(priv->overlay);
    cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
    cairo_paint(cr);

    cairo_set_operator(cr, CAIRO_OPERATOR_OVER);

    /* --------- draw zoom and dpad shape shadow ----------- */
    gint x = 0, y = 0;

#ifdef OSD_SHADOW_ENABLE
    osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);
    osm_gps_map_osd_shape_shadow(cr);
    osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);
    osm_gps_map_osd_shape_shadow(cr);
#endif

    /* --------- draw zoom and dpad shape ----------- */

    osm_gps_map_osd_zoom_shape(cr, x, y);
#ifndef OSD_COLOR
    osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);
#else
    osm_gps_map_osd_shape(cr);
#endif
    osm_gps_map_osd_dpad_shape(cr, x, y);
#ifndef OSD_COLOR
    osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);
#else
    osm_gps_map_osd_shape(cr);
#endif

    /* --------- draw zoom and dpad labels --------- */

#ifdef OSD_SHADOW_ENABLE
    osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);
    osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);
    osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);
    osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW); 
    osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
#endif

    osm_gps_map_osd_zoom_labels(cr, x, y);
    osm_gps_map_osd_dpad_labels(cr, x, y);
#ifndef OSD_COLOR
    osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE, &priv->fg, &priv->da);
#else
    osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);
#endif
    osm_gps_map_osd_dpad_gps(cr, x, y);
#ifndef OSD_COLOR
    osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL, &priv->fg, &priv->da);
#else
    osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL);
#endif
    
    cairo_destroy(cr);
}

static void
osm_gps_map_osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
{
    osd_priv_t *priv = (osd_priv_t*)osd->priv; 

    /* OSD itself uses some off-screen rendering, so check if the */
    /* offscreen buffer is present and create it if not */
    if(!priv->overlay) {
        /* create overlay ... */
        priv->overlay = 
            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);
        /* ... and render it */
        osm_gps_map_osd_render(osd);
    }

    // now draw this onto the original context 
    cairo_t *cr = gdk_cairo_create(drawable);
    cairo_set_source_surface(cr, priv->overlay, OSD_X, OSD_Y);
    cairo_paint(cr);
    cairo_destroy(cr);
}

static void
osm_gps_map_osd_free(osm_gps_map_osd_t *osd) 
{
    osd_priv_t *priv = (osd_priv_t *)(osd->priv);

    if (priv->overlay)
         cairo_surface_destroy(priv->overlay);

    g_free(priv);
}

static osm_gps_map_osd_t osd_classic = {
    .draw       = osm_gps_map_osd_draw,
    .check      = osm_gps_map_osd_check,
    .render     = osm_gps_map_osd_render,
    .free       = osm_gps_map_osd_free,

    .cb         = NULL,
    .data       = NULL,

    .priv       = NULL
};

/* this is the only function that's externally visible */
void
osm_gps_map_osd_classic_init(OsmGpsMap *map) 
{
    osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);

    osd_classic.priv = priv;

    /* extract style info from the widget */
    priv->bg = GTK_WIDGET(map)->style->bg[GTK_STATE_NORMAL];
    priv->fg = GTK_WIDGET(map)->style->fg[GTK_STATE_NORMAL];
    priv->da = GTK_WIDGET(map)->style->fg[GTK_STATE_INSENSITIVE];

    osm_gps_map_register_osd(map, &osd_classic);
}


/* below are osd specific functions which aren't used by osm-gps-map */
/* but instead are to be used by the main application */
void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, gpointer data) {
    osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);

    g_return_if_fail (osd);

    osd->cb = cb;
    osd->data = data;

    /* this may have changed the state of the gps button */
    /* we thus re-render the overlay */
    osd->render(osd);

    osm_gps_map_redraw(map);
}
1	harbaum	71	/* -- Mode: C; indent-tabs-mode: nil; c-basic-offset: 4; tab-width: 4 -- */
2			/* vim:set et sw=4 ts=4 cino=t0,(0: */
3	harbaum	70	/*
4			* Copyright (C) Till Harbaum 2009 <till@harbaum.org>
5			*
6			* osm-gps-map is free software: you can redistribute it and/or modify it
7			* under the terms of the GNU General Public License as published by the
8			* Free Software Foundation, either version 3 of the License, or
9			* (at your option) any later version.
10			*
11			* osm-gps-map is distributed in the hope that it will be useful, but
12			* WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14			* See the GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License along
17			* with this program. If not, see <http://www.gnu.org/licenses/>.
18			*/
19
20	harbaum	73	#include "config.h"
21			#include <stdlib.h> // abs
22			#include <math.h> // M_PI
23	harbaum	70
24	harbaum	71	/* parameters that can be overwritten from the config file: */
25			/* OSM_GPS_MAP_OSD_DIAMETER */
26
27			#ifndef USE_CAIRO
28			#error "OSD control display lacks a non-cairo implementation!"
29	harbaum	70	#endif
30
31	harbaum	71	#include <cairo.h>
32
33			#include "osm-gps-map.h"
34	harbaum	73	#include "osm-gps-map-osd-classic.h"
35	harbaum	71
36	harbaum	70	//the osd controls
37			typedef struct {
38	harbaum	74	/* the offscreen representation of the OSD */
39			cairo_surface_t *overlay;
40
41			GdkColor bg, fg, da;
42
43	harbaum	70	} osd_priv_t;
44
45			/* position and extent of bounding box */
46			#define OSD_X (10)
47			#define OSD_Y (10)
48
49			/* parameters of the direction shape */
50			#ifndef OSM_GPS_MAP_OSD_DIAMETER
51			#define D_RAD (30) // diameter of dpad
52			#else
53			#define D_RAD (OSM_GPS_MAP_OSD_DIAMETER)
54			#endif
55			#define D_TIP (4*D_RAD/5) // distance of arrow tip from dpad center
56			#define D_LEN (D_RAD/4) // length of arrow
57			#define D_WID (D_LEN) // width of arrow
58
59			/* parameters of the "zoom" pad */
60			#define Z_STEP (D_RAD/4) // distance between dpad and zoom
61			#define Z_RAD (D_RAD/2) // radius of "caps" of zoom bar
62
63	harbaum	74	#ifdef OSD_SHADOW_ENABLE
64	harbaum	70	/* shadow also depends on control size */
65			#define OSD_SHADOW (D_RAD/6)
66	harbaum	74	#else
67			#define OSD_SHADOW (0)
68			#endif
69	harbaum	70
70			/* total width and height of controls incl. shadow */
71			#define OSD_W (2*D_RAD + OSD_SHADOW)
72			#define OSD_H (2D_RAD + Z_STEP + 2Z_RAD + OSD_SHADOW)
73
74	harbaum	74	#ifdef OSD_SHADOW_ENABLE
75	harbaum	70	#define OSD_LBL_SHADOW (OSD_SHADOW/2)
76	harbaum	74	#endif
77	harbaum	70
78			#define Z_TOP (2 * D_RAD + Z_STEP)
79			#define Z_MID (Z_TOP + Z_RAD)
80			#define Z_BOT (Z_MID + Z_RAD)
81			#define Z_LEFT (Z_RAD)
82			#define Z_RIGHT (2 * D_RAD - Z_RAD)
83
84	harbaum	71
85	harbaum	70	/* create the cairo shape used for the zoom buttons */
86			static void
87	harbaum	71	osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)
88			{
89	harbaum	70	cairo_move_to (cr, x+Z_LEFT, y+Z_TOP);
90			cairo_line_to (cr, x+Z_RIGHT, y+Z_TOP);
91			cairo_arc (cr, x+Z_RIGHT, y+Z_MID, Z_RAD, -M_PI/2, M_PI/2);
92			cairo_line_to (cr, x+Z_LEFT, y+Z_BOT);
93			cairo_arc (cr, x+Z_LEFT, y+Z_MID, Z_RAD, M_PI/2, -M_PI/2);
94			}
95
96			/* create the cairo shape used for the dpad */
97			static void
98	harbaum	71	osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)
99			{
100	harbaum	70	cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);
101			}
102
103			static gboolean
104			osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)
105			{
106			return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
107			}
108
109			/* check whether x/y is within the dpad */
110			static osd_button_t
111			osm_gps_map_osd_check_dpad(gint x, gint y)
112			{
113			/* within entire dpad circle */
114			if( osm_gps_map_in_circle(x, y, OSD_X + D_RAD, OSD_Y + D_RAD, D_RAD))
115			{
116			/* convert into position relative to dpads centre */
117			x -= (OSD_X + D_RAD);
118			y -= (OSD_Y + D_RAD);
119
120			/* check for dpad center goes here! */
121			if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3))
122			return OSD_GPS;
123
124			if( y < 0 && abs(x) < abs(y))
125			return OSD_UP;
126
127			if( y > 0 && abs(x) < abs(y))
128			return OSD_DOWN;
129
130			if( x < 0 && abs(y) < abs(x))
131			return OSD_LEFT;
132
133			if( x > 0 && abs(y) < abs(x))
134			return OSD_RIGHT;
135
136			return OSD_BG;
137			}
138			return OSD_NONE;
139			}
140
141			/* check whether x/y is within the zoom pads */
142			static osd_button_t
143			osm_gps_map_osd_check_zoom(gint x, gint y) {
144			if( x > OSD_X && x < (OSD_X + OSD_W) && y > Z_TOP && y < (OSD_Y+Z_BOT)) {
145
146			/* within circle around (-) label */
147			if( osm_gps_map_in_circle(x, y, OSD_X + Z_LEFT, OSD_Y + Z_MID, Z_RAD))
148			return OSD_OUT;
149
150			/* between center of (-) button and center of entire zoom control area */
151			if(x > OSD_LEFT && x < OSD_X + D_RAD)
152			return OSD_OUT;
153
154			/* within circle around (+) label */
155			if( osm_gps_map_in_circle(x, y, OSD_X + Z_RIGHT, OSD_Y + Z_MID, Z_RAD))
156			return OSD_IN;
157
158			/* between center of (+) button and center of entire zoom control area */
159			if(x < OSD_RIGHT && x > OSD_X + D_RAD)
160			return OSD_IN;
161			}
162
163			return OSD_NONE;
164			}
165
166			static osd_button_t
167			osm_gps_map_osd_check(gint x, gint y) {
168			osd_button_t but = OSD_NONE;
169
170			/* first do a rough test for the OSD area. */
171			/* this is just to avoid an unnecessary detailed test */
172			if(x > OSD_X && x < OSD_X + OSD_W &&
173			y > OSD_Y && y < OSD_Y + OSD_H) {
174			but = osm_gps_map_osd_check_dpad(x, y);
175
176			if(but == OSD_NONE)
177			but = osm_gps_map_osd_check_zoom(x, y);
178			}
179
180			return but;
181			}
182
183	harbaum	74	#ifdef OSD_SHADOW_ENABLE
184	harbaum	70	static void
185			osm_gps_map_osd_shape_shadow(cairo_t *cr) {
186			cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
187			cairo_fill (cr);
188			cairo_stroke (cr);
189			}
190	harbaum	74	#endif
191	harbaum	70
192	harbaum	74	#ifndef OSD_COLOR
193			/* if no color has been specified we just use the gdks default colors */
194	harbaum	70	static void
195	harbaum	74	osm_gps_map_osd_shape(cairo_t cr, GdkColor bg, GdkColor *fg) {
196			gdk_cairo_set_source_color(cr, bg);
197			cairo_fill_preserve (cr);
198			gdk_cairo_set_source_color(cr, fg);
199			cairo_set_line_width (cr, 1);
200			cairo_stroke (cr);
201			}
202			#else
203			static void
204	harbaum	70	osm_gps_map_osd_shape(cairo_t *cr) {
205	harbaum	74	cairo_set_source_rgb (cr, OSD_COLOR_BG);
206	harbaum	70	cairo_fill_preserve (cr);
207			cairo_set_source_rgb (cr, OSD_COLOR);
208			cairo_set_line_width (cr, 1);
209			cairo_stroke (cr);
210			}
211	harbaum	74	#endif
212	harbaum	70
213			static void
214			osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {
215			/* move reference to dpad center */
216			x += D_RAD;
217			y += D_RAD;
218
219			const static gint offset[][3][2] = {
220			/* left arrow/triangle */
221			{ { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
222			/* right arrow/triangle */
223			{ { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
224			/* top arrow/triangle */
225			{ { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
226			/* bottom arrow/triangle */
227			{ { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
228			};
229
230			int i;
231			for(i=0;i<4;i++) {
232			cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
233			cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
234			cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
235			}
236			}
237
238			/* draw the sattelite dish icon in the center of the dpad */
239			#define GPS_V0 (D_RAD/8)
240			#define GPS_V1 (D_RAD/10)
241			#define GPS_V2 (D_RAD/5)
242
243			/* draw a satellite receiver dish */
244			static void
245			osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {
246			/* move reference to dpad center */
247			x += D_RAD;
248			y += D_RAD + GPS_V0;
249
250			cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
251			cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
252			cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
253			cairo_close_path (cr);
254
255			cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
256			cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
257			cairo_close_path (cr);
258
259			x += GPS_V1;
260			cairo_move_to (cr, x, y-GPS_V2);
261			cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
262			}
263
264			#define Z_LEN (2*Z_RAD/3)
265
266			static void
267			osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {
268			cairo_move_to (cr, x + Z_LEFT - Z_LEN, y + Z_MID);
269			cairo_line_to (cr, x + Z_LEFT + Z_LEN, y + Z_MID);
270
271			cairo_move_to (cr, x + Z_RIGHT, y + Z_MID - Z_LEN);
272			cairo_line_to (cr, x + Z_RIGHT, y + Z_MID + Z_LEN);
273			cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
274			cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
275			}
276
277	harbaum	74	#ifndef OSD_COLOR
278			/* if no color has been specified we just use the gdks default colors */
279	harbaum	70	static void
280	harbaum	74	osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled,
281			GdkColor fg, GdkColor disabled) {
282			if(enabled) gdk_cairo_set_source_color(cr, fg);
283			else gdk_cairo_set_source_color(cr, disabled);
284			cairo_set_line_width (cr, width);
285			cairo_stroke (cr);
286			}
287			#else
288			static void
289	harbaum	70	osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {
290			if(enabled) cairo_set_source_rgb (cr, OSD_COLOR);
291			else cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
292			cairo_set_line_width (cr, width);
293			cairo_stroke (cr);
294			}
295	harbaum	74	#endif
296	harbaum	70
297	harbaum	74	#ifdef OSD_SHADOW_ENABLE
298	harbaum	70	static void
299			osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
300			cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
301			cairo_set_line_width (cr, width);
302			cairo_stroke (cr);
303			}
304	harbaum	74	#endif
305	harbaum	70
306			static void
307	harbaum	73	osm_gps_map_osd_render(osm_gps_map_osd_t *osd) {
308			osd_priv_t priv = (osd_priv_t)osd->priv;
309	harbaum	70
310			/* first fill with transparency */
311	harbaum	73	cairo_t *cr = cairo_create(priv->overlay);
312	harbaum	70	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
313			cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
314			cairo_paint(cr);
315
316			cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
317
318			/* --------- draw zoom and dpad shape shadow ----------- */
319			gint x = 0, y = 0;
320
321	harbaum	74	#ifdef OSD_SHADOW_ENABLE
322	harbaum	70	osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);
323			osm_gps_map_osd_shape_shadow(cr);
324			osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);
325			osm_gps_map_osd_shape_shadow(cr);
326	harbaum	74	#endif
327	harbaum	70
328			/* --------- draw zoom and dpad shape ----------- */
329
330			osm_gps_map_osd_zoom_shape(cr, x, y);
331	harbaum	74	#ifndef OSD_COLOR
332			osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);
333			#else
334	harbaum	70	osm_gps_map_osd_shape(cr);
335	harbaum	74	#endif
336	harbaum	70	osm_gps_map_osd_dpad_shape(cr, x, y);
337	harbaum	74	#ifndef OSD_COLOR
338			osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);
339			#else
340	harbaum	70	osm_gps_map_osd_shape(cr);
341	harbaum	74	#endif
342	harbaum	70
343			/* --------- draw zoom and dpad labels --------- */
344
345	harbaum	74	#ifdef OSD_SHADOW_ENABLE
346	harbaum	70	osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);
347			osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);
348			osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);
349			osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);
350	harbaum	73	osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
351	harbaum	74	#endif
352	harbaum	70
353			osm_gps_map_osd_zoom_labels(cr, x, y);
354			osm_gps_map_osd_dpad_labels(cr, x, y);
355	harbaum	74	#ifndef OSD_COLOR
356			osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE, &priv->fg, &priv->da);
357			#else
358	harbaum	70	osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);
359	harbaum	74	#endif
360	harbaum	70	osm_gps_map_osd_dpad_gps(cr, x, y);
361	harbaum	74	#ifndef OSD_COLOR
362			osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL, &priv->fg, &priv->da);
363			#else
364	harbaum	73	osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL);
365	harbaum	74	#endif
366	harbaum	70
367			cairo_destroy(cr);
368			}
369
370			static void
371	harbaum	75	osm_gps_map_osd_draw(osm_gps_map_osd_t osd, GdkDrawable drawable)
372	harbaum	70	{
373	harbaum	73	osd_priv_t priv = (osd_priv_t)osd->priv;
374	harbaum	70
375			/* OSD itself uses some off-screen rendering, so check if the */
376			/* offscreen buffer is present and create it if not */
377	harbaum	73	if(!priv->overlay) {
378	harbaum	70	/* create overlay ... */
379	harbaum	73	priv->overlay =
380	harbaum	70	cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);
381			/* ... and render it */
382	harbaum	73	osm_gps_map_osd_render(osd);
383	harbaum	70	}
384
385			// now draw this onto the original context
386	harbaum	75	cairo_t *cr = gdk_cairo_create(drawable);
387			cairo_set_source_surface(cr, priv->overlay, OSD_X, OSD_Y);
388	harbaum	70	cairo_paint(cr);
389			cairo_destroy(cr);
390			}
391
392			static void
393	harbaum	73	osm_gps_map_osd_free(osm_gps_map_osd_t *osd)
394	harbaum	70	{
395	harbaum	73	osd_priv_t priv = (osd_priv_t )(osd->priv);
396	harbaum	70
397	harbaum	73	if (priv->overlay)
398			cairo_surface_destroy(priv->overlay);
399	harbaum	70
400	harbaum	73	g_free(priv);
401			}
402
403			static osm_gps_map_osd_t osd_classic = {
404			.draw = osm_gps_map_osd_draw,
405			.check = osm_gps_map_osd_check,
406			.render = osm_gps_map_osd_render,
407			.free = osm_gps_map_osd_free,
408
409			.cb = NULL,
410			.data = NULL,
411
412			.priv = NULL
413			};
414
415			/* this is the only function that's externally visible */
416			void
417			osm_gps_map_osd_classic_init(OsmGpsMap *map)
418			{
419			osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
420
421			osd_classic.priv = priv;
422
423	harbaum	74	/* extract style info from the widget */
424			priv->bg = GTK_WIDGET(map)->style->bg[GTK_STATE_NORMAL];
425			priv->fg = GTK_WIDGET(map)->style->fg[GTK_STATE_NORMAL];
426			priv->da = GTK_WIDGET(map)->style->fg[GTK_STATE_INSENSITIVE];
427
428	harbaum	73	osm_gps_map_register_osd(map, &osd_classic);
429			}
430
431
432	harbaum	74	/* below are osd specific functions which aren't used by osm-gps-map */
433			/* but instead are to be used by the main application */
434	harbaum	73	void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, gpointer data) {
435			osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
436
437			g_return_if_fail (osd);
438
439			osd->cb = cb;
440			osd->data = data;
441
442	harbaum	70	/* this may have changed the state of the gps button */
443			/* we thus re-render the overlay */
444	harbaum	73	osd->render(osd);
445	harbaum	70
446	harbaum	73	osm_gps_map_redraw(map);
447	harbaum	70	}