/* * Copyright (C) 2008 Pierre-Luc Beaudoin * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #define MARKER_SIZE 10 static gboolean draw_center (ClutterCanvas *canvas, cairo_t *cr, int width, int height) { cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR); cairo_paint(cr); cairo_set_operator (cr, CAIRO_OPERATOR_OVER); /* Draw the circle */ cairo_set_source_rgb (cr, 0, 0, 0); cairo_arc (cr, MARKER_SIZE / 2.0, MARKER_SIZE / 2.0, MARKER_SIZE / 2.0, 0, 2 * M_PI); cairo_close_path (cr); /* Fill the circle */ cairo_set_source_rgba (cr, 0.1, 0.1, 0.9, 1.0); cairo_fill (cr); return TRUE; } static gboolean draw_circle (ClutterCanvas *canvas, cairo_t *cr, int width, int height) { /* Draw the circle */ cairo_set_source_rgb (cr, 0, 0, 0); cairo_arc (cr, MARKER_SIZE, MARKER_SIZE, 0.9 * MARKER_SIZE, 0, 2 * M_PI); cairo_close_path (cr); /* Stroke the circle */ cairo_set_line_width (cr, 2.0); cairo_set_source_rgba (cr, 0.1, 0.1, 0.7, 1.0); cairo_stroke (cr); return TRUE; } /* The marker is drawn with cairo. It is composed of 1 static filled circle * and 1 stroked circle animated as an echo. */ static ClutterActor * create_marker () { ClutterActor *marker; ClutterActor *bg; ClutterContent *canvas; ClutterTransition *transition; /* Create the marker */ marker = champlain_custom_marker_new (); /* Static filled circle ----------------------------------------------- */ canvas = clutter_canvas_new (); clutter_canvas_set_size (CLUTTER_CANVAS (canvas), MARKER_SIZE, MARKER_SIZE); g_signal_connect (canvas, "draw", G_CALLBACK (draw_center), NULL); bg = clutter_actor_new (); clutter_actor_set_size (bg, MARKER_SIZE, MARKER_SIZE); clutter_actor_set_content (bg, canvas); clutter_content_invalidate (canvas); g_object_unref (canvas); /* Add the circle to the marker */ clutter_actor_add_child (marker, bg); clutter_actor_set_position (bg, -0.5 * MARKER_SIZE, -0.5 * MARKER_SIZE); /* Echo circle -------------------------------------------------------- */ canvas = clutter_canvas_new (); clutter_canvas_set_size (CLUTTER_CANVAS (canvas), 2 * MARKER_SIZE, 2 * MARKER_SIZE); g_signal_connect (canvas, "draw", G_CALLBACK (draw_circle), NULL); bg = clutter_actor_new (); clutter_actor_set_size (bg, 2 * MARKER_SIZE, 2 * MARKER_SIZE); clutter_actor_set_content (bg, canvas); clutter_content_invalidate (canvas); g_object_unref (canvas); /* Add the circle to the marker */ clutter_actor_add_child (marker, bg); clutter_actor_set_pivot_point (bg, 0.5, 0.5); clutter_actor_set_position (bg, -MARKER_SIZE, -MARKER_SIZE); transition = clutter_property_transition_new ("opacity"); clutter_actor_set_easing_mode (bg, CLUTTER_EASE_OUT_SINE); clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 1000); clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), -1); clutter_transition_set_from (transition, G_TYPE_UINT, 255); clutter_transition_set_to (transition, G_TYPE_UINT, 0); clutter_actor_add_transition (bg, "animate-opacity", transition); transition = clutter_property_transition_new ("scale-x"); clutter_actor_set_easing_mode (bg, CLUTTER_EASE_OUT_SINE); clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 1000); clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), -1); clutter_transition_set_from (transition, G_TYPE_FLOAT, 0.5); clutter_transition_set_to (transition, G_TYPE_FLOAT, 2.0); clutter_actor_add_transition (bg, "animate-scale-x", transition); transition = clutter_property_transition_new ("scale-y"); clutter_actor_set_easing_mode (bg, CLUTTER_EASE_OUT_SINE); clutter_timeline_set_duration (CLUTTER_TIMELINE (transition), 1000); clutter_timeline_set_repeat_count (CLUTTER_TIMELINE (transition), -1); clutter_transition_set_from (transition, G_TYPE_FLOAT, 0.5); clutter_transition_set_to (transition, G_TYPE_FLOAT, 2.0); clutter_actor_add_transition (bg, "animate-scale-y", transition); return marker; } double lat = 45.466; double lon = -73.75; typedef struct { ChamplainView *view; ChamplainMarker *marker; } GpsCallbackData; static gboolean gps_callback (GpsCallbackData *data) { lat += 0.005; lon += 0.005; champlain_view_center_on (data->view, lat, lon); champlain_location_set_location (CHAMPLAIN_LOCATION (data->marker), lat, lon); return TRUE; } int main (int argc, char *argv[]) { ClutterActor *actor, *marker, *stage; ChamplainMarkerLayer *layer; GpsCallbackData callback_data; if (clutter_init (&argc, &argv) != CLUTTER_INIT_SUCCESS) return 1; stage = clutter_stage_new (); clutter_actor_set_size (stage, 800, 600); g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL); /* Create the map view */ actor = champlain_view_new (); clutter_actor_set_size (CLUTTER_ACTOR (actor), 800, 600); clutter_actor_add_child (stage, actor); /* Create the marker layer */ layer = champlain_marker_layer_new_full (CHAMPLAIN_SELECTION_SINGLE); clutter_actor_show (CLUTTER_ACTOR (layer)); champlain_view_add_layer (CHAMPLAIN_VIEW (actor), CHAMPLAIN_LAYER (layer)); /* Create a marker */ marker = create_marker (); champlain_marker_layer_add_marker (layer, CHAMPLAIN_MARKER (marker)); /* Finish initialising the map view */ g_object_set (G_OBJECT (actor), "zoom-level", 12, "kinetic-mode", TRUE, NULL); champlain_view_center_on (CHAMPLAIN_VIEW (actor), lat, lon); /* Create callback that updates the map periodically */ callback_data.view = CHAMPLAIN_VIEW (actor); callback_data.marker = CHAMPLAIN_MARKER (marker); g_timeout_add (1000, (GSourceFunc) gps_callback, &callback_data); clutter_actor_show (stage); clutter_main (); return 0; }