+++ /dev/null
-/*
- * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
- *
- * This program 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.
- *
- * This program 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/>.
- */
-
-/**
- * SECTION:gis-viewer
- * @short_description: Virtual globe base class
- *
- * #GisViewer is the base class for the virtual globe widget. It handles
- * everything not directly related to drawing the globe. Plugins and
- * applications using the viewer should normally talk to the viewer and not care
- * how it is implemented.
- */
-
-#include <config.h>
-#include <math.h>
-#include <gtk/gtk.h>
-#include <gdk/gdkkeysyms.h>
-
-#include "gis-marshal.h"
-#include "gis-viewer.h"
-
-#include "gis-util.h"
-
-
-/* Constants */
-enum {
- SIG_TIME_CHANGED,
- SIG_LOCATION_CHANGED,
- SIG_ROTATION_CHANGED,
- SIG_REFRESH,
- SIG_OFFLINE,
- NUM_SIGNALS,
-};
-static guint signals[NUM_SIGNALS];
-
-
-/***********
- * Helpers *
- ***********/
-/* Misc helpers */
-static void _gis_viewer_fix_location(GisViewer *viewer)
-{
- while (viewer->location[0] < -90) viewer->location[0] += 180;
- while (viewer->location[0] > 90) viewer->location[0] -= 180;
- while (viewer->location[1] < -180) viewer->location[1] += 360;
- while (viewer->location[1] > 180) viewer->location[1] -= 360;
- viewer->location[2] = ABS(viewer->location[2]);
-}
-
-/* Signal helpers */
-static void _gis_viewer_emit_location_changed(GisViewer *viewer)
-{
- g_signal_emit(viewer, signals[SIG_LOCATION_CHANGED], 0,
- viewer->location[0],
- viewer->location[1],
- viewer->location[2]);
-}
-static void _gis_viewer_emit_rotation_changed(GisViewer *viewer)
-{
- g_signal_emit(viewer, signals[SIG_ROTATION_CHANGED], 0,
- viewer->rotation[0],
- viewer->rotation[1],
- viewer->rotation[2]);
-}
-static void _gis_viewer_emit_time_changed(GisViewer *viewer)
-{
- g_signal_emit(viewer, signals[SIG_TIME_CHANGED], 0,
- viewer->time);
-}
-static void _gis_viewer_emit_refresh(GisViewer *viewer)
-{
- g_signal_emit(viewer, signals[SIG_REFRESH], 0);
-}
-static void _gis_viewer_emit_offline(GisViewer *viewer)
-{
- g_signal_emit(viewer, signals[SIG_OFFLINE], 0,
- viewer->offline);
-}
-
-/*************
- * Callbacks *
- *************/
-static gboolean on_key_press(GisViewer *viewer, GdkEventKey *event, gpointer _)
-{
- g_debug("GisViewer: on_key_press - key=%x, state=%x, plus=%x",
- event->keyval, event->state, GDK_plus);
-
- double lat, lon, elev, pan;
- gis_viewer_get_location(viewer, &lat, &lon, &elev);
- pan = MIN(elev/(EARTH_R/2), 30);
- switch (event->keyval) {
- case GDK_Left: case GDK_h: gis_viewer_pan(viewer, 0, -pan, 0); break;
- case GDK_Down: case GDK_j: gis_viewer_pan(viewer, -pan, 0, 0); break;
- case GDK_Up: case GDK_k: gis_viewer_pan(viewer, pan, 0, 0); break;
- case GDK_Right: case GDK_l: gis_viewer_pan(viewer, 0, pan, 0); break;
- case GDK_minus: case GDK_o: gis_viewer_zoom(viewer, 10./9); break;
- case GDK_plus: case GDK_i: gis_viewer_zoom(viewer, 9./10); break;
- case GDK_H: gis_viewer_rotate(viewer, 0, 0, -2); break;
- case GDK_J: gis_viewer_rotate(viewer, 2, 0, 0); break;
- case GDK_K: gis_viewer_rotate(viewer, -2, 0, 0); break;
- case GDK_L: gis_viewer_rotate(viewer, 0, 0, 2); break;
- }
- return FALSE;
-}
-
-static gboolean on_scroll(GisViewer *viewer, GdkEventScroll *event, gpointer _)
-{
- switch (event->direction) {
- case GDK_SCROLL_DOWN: gis_viewer_zoom(viewer, 10./9); break;
- case GDK_SCROLL_UP: gis_viewer_zoom(viewer, 9./10); break;
- default: break;
- }
- return FALSE;
-}
-
-enum {
- GIS_DRAG_NONE,
- GIS_DRAG_PAN,
- GIS_DRAG_ZOOM,
- GIS_DRAG_TILT,
-};
-
-static gboolean on_button_press(GisViewer *viewer, GdkEventButton *event, gpointer _)
-{
- g_debug("GisViewer: on_button_press - %d", event->button);
- gtk_widget_grab_focus(GTK_WIDGET(viewer));
- switch (event->button) {
- case 1: viewer->drag_mode = GIS_DRAG_PAN; break;
- case 2: viewer->drag_mode = GIS_DRAG_ZOOM; break;
- case 3: viewer->drag_mode = GIS_DRAG_TILT; break;
- default: viewer->drag_mode = GIS_DRAG_NONE; break;
- }
- viewer->drag_x = event->x;
- viewer->drag_y = event->y;
- return FALSE;
-}
-
-static gboolean on_button_release(GisViewer *viewer, GdkEventButton *event, gpointer _)
-{
- g_debug("GisViewer: on_button_release");
- viewer->drag_mode = GIS_DRAG_NONE;
- return FALSE;
-}
-
-static gboolean on_motion_notify(GisViewer *viewer, GdkEventMotion *event, gpointer _)
-{
- gdouble x = viewer->drag_x - event->x;
- gdouble y = viewer->drag_y - event->y;
- gdouble lat, lon, elev, scale;
- gis_viewer_get_location(GIS_VIEWER(viewer), &lat, &lon, &elev);
- scale = elev/EARTH_R/15;
- switch (viewer->drag_mode) {
- case GIS_DRAG_PAN: gis_viewer_pan(viewer, -y*scale, x*scale, 0); break;
- case GIS_DRAG_ZOOM: gis_viewer_zoom(viewer, pow(2, -y/500)); break;
- case GIS_DRAG_TILT: gis_viewer_rotate(viewer, y/10, 0, x/10); break;
- }
- viewer->drag_x = event->x;
- viewer->drag_y = event->y;
- return FALSE;
-}
-
-static void on_view_changed(GisViewer *viewer,
- gdouble _1, gdouble _2, gdouble _3)
-{
- gtk_widget_queue_draw(GTK_WIDGET(viewer));
-}
-
-static void on_realize(GisViewer *viewer)
-{
- GdkCursor *cursor = gdk_cursor_new(GDK_FLEUR);
- GdkWindow *window = gtk_widget_get_window(GTK_WIDGET(viewer));
- gdk_window_set_cursor(window, cursor);
-}
-
-/***********
- * Methods *
- ***********/
-/**
- * gis_viewer_setup:
- * @viewer: the viewer
- * @plugins: a plugins store
- * @prefs: a prefs store
- *
- * This should be called by objects which implement GisViewer somewhere in their
- * constructor.
- */
-void gis_viewer_setup(GisViewer *viewer, GisPlugins *plugins, GisPrefs *prefs)
-{
- viewer->plugins = plugins;
- viewer->prefs = prefs;
- viewer->offline = gis_prefs_get_boolean(prefs, "gis/offline", NULL);
-}
-
-/**
- * gis_viewer_set_time:
- * @viewer: the viewer
- * @time: the time to set the view to
- *
- * Set the current time for the view
- */
-void gis_viewer_set_time(GisViewer *viewer, time_t time)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: set_time - time=%ld", time);
- viewer->time = time;
- _gis_viewer_emit_time_changed(viewer);
-}
-
-/**
- * gis_viewer_get_time:
- * @viewer: the viewer
- *
- * Get the time that is being viewed
- *
- * Returns: the current time
- */
-time_t gis_viewer_get_time(GisViewer *viewer)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: get_time");
- return viewer->time;
-}
-
-/**
- * gis_viewer_set_location:
- * @viewer: the viewer
- * @lat: the new latitude
- * @lon: the new longitude
- * @elev: the new elevation
- *
- * Set the location for the camera
- */
-void gis_viewer_set_location(GisViewer *viewer, gdouble lat, gdouble lon, gdouble elev)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: set_location");
- viewer->location[0] = lat;
- viewer->location[1] = lon;
- viewer->location[2] = elev;
- _gis_viewer_fix_location(viewer);
- _gis_viewer_emit_location_changed(viewer);
-}
-
-/**
- * gis_viewer_get_location:
- * @viewer: the viewer
- * @lat: the location to store the latitude
- * @lon: the location to store the longitude
- * @elev: the location to store the elevation
- *
- * Get the location of the camera
- */
-void gis_viewer_get_location(GisViewer *viewer, gdouble *lat, gdouble *lon, gdouble *elev)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- //g_debug("GisViewer: get_location");
- *lat = viewer->location[0];
- *lon = viewer->location[1];
- *elev = viewer->location[2];
-}
-
-/**
- * gis_viewer_pan:
- * @viewer: the viewer
- * @forward: distance to move forward in meters
- * @right: distance to move right in meters
- * @up: distance to move up in meters
- *
- * Pan the location by a number of meters long the surface.
- *
- * Bugs: the distances are not in meters
- * Bugs: panning does not move in strait lines
- */
-void gis_viewer_pan(GisViewer *viewer, gdouble forward, gdouble sideways, gdouble up)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: pan - forward=%8.3f, sideways=%8.3f, up=%8.3f",
- forward, sideways, up);
- gdouble dist = sqrt(forward*forward + sideways*sideways);
- gdouble angle1 = deg2rad(viewer->rotation[2]);
- gdouble angle2 = atan2(sideways, forward);
- gdouble angle = angle1 + angle2;
- /* This isn't accurate, but it's usable */
- viewer->location[0] += dist*cos(angle);
- viewer->location[1] += dist*sin(angle);
- viewer->location[2] += up;
- _gis_viewer_fix_location(viewer);
- _gis_viewer_emit_location_changed(viewer);
-}
-
-/**
- * gis_viewer_zoom:
- * @viewer: the viewer
- * @scale: the scale to multiple the elevation by
- *
- * Multiple the elevation by a scale.
- */
-void gis_viewer_zoom(GisViewer *viewer, gdouble scale)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: zoom");
- viewer->location[2] *= scale;
- _gis_viewer_emit_location_changed(viewer);
-}
-
-/**
- * gis_viewer_set_rotation:
- * @viewer: the viewer
- * @x: rotation new around the x axes
- * @y: rotation new around the y axes
- * @z: rotation new around the z axes
- *
- * Set the rotations in degrees around the x, y, and z axes.
- */
-void gis_viewer_set_rotation(GisViewer *viewer, gdouble x, gdouble y, gdouble z)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: set_rotation");
- viewer->rotation[0] = x;
- viewer->rotation[1] = y;
- viewer->rotation[2] = z;
- _gis_viewer_emit_rotation_changed(viewer);
-}
-
-/**
- * gis_viewer_get_rotation:
- * @viewer: the viewer
- * @x: rotation around the x axes
- * @y: rotation around the y axes
- * @z: rotation around the z axes
- *
- * Get the rotations in degrees around the x, y, and z axes.
- */
-void gis_viewer_get_rotation(GisViewer *viewer, gdouble *x, gdouble *y, gdouble *z)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: get_rotation");
- *x = viewer->rotation[0];
- *y = viewer->rotation[1];
- *z = viewer->rotation[2];
-}
-
-/**
- * gis_viewer_rotate:
- * @viewer: the viewer
- * @x: rotation around the x axes
- * @y: rotation around the y axes
- * @z: rotation around the z axes
- *
- * Add to the rotation around the x, y, and z axes.
- */
-void gis_viewer_rotate(GisViewer *viewer, gdouble x, gdouble y, gdouble z)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: rotate - x=%.0f, y=%.0f, z=%.0f", x, y, z);
- viewer->rotation[0] += x;
- viewer->rotation[1] += y;
- viewer->rotation[2] += z;
- _gis_viewer_emit_rotation_changed(viewer);
-}
-
-/**
- * gis_viewer_refresh:
- * @viewer: the viewer
- *
- * Trigger the refresh signal. This will cause any remote data to be checked for
- * updates.
- */
-void gis_viewer_refresh(GisViewer *viewer)
-{
- g_debug("GisViewer: refresh");
- _gis_viewer_emit_refresh(viewer);
-}
-
-/**
- * gis_viewer_set_offline:
- * @viewer: the viewer
- * @offline: %TRUE to enter offline mode
- *
- * Set the offline mode. If @offline is %TRUE, only locally cached data will be
- * used.
- */
-void gis_viewer_set_offline(GisViewer *viewer, gboolean offline)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: set_offline - %d", offline);
- gis_prefs_set_boolean(viewer->prefs, "gis/offline", offline);
- viewer->offline = offline;
- _gis_viewer_emit_offline(viewer);
-}
-
-/**
- * gis_viewer_get_offline:
- * @viewer: the viewer
- *
- * Check if the viewer is in offline mode.
- *
- * Returns: %TRUE if the viewer is in offline mode.
- */
-gboolean gis_viewer_get_offline(GisViewer *viewer)
-{
- g_assert(GIS_IS_VIEWER(viewer));
- g_debug("GisViewer: get_offline - %d", viewer->offline);
- return viewer->offline;
-}
-
-/***********************************
- * To be implemented by subclasses *
- ***********************************/
-/**
- * gis_viewer_center_position:
- * @viewer: the viewer
- * @lat: the latitude
- * @lon: the longitude
- * @elev: the elevation
- *
- * Center the viewer on a point. This can be used before drawing operations to
- * center the items a particular location.
- */
-void gis_viewer_center_position(GisViewer *viewer,
- gdouble lat, gdouble lon, gdouble elev)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->center_position)
- g_warning("GisViewer: center_position - Unimplemented");
- klass->center_position(viewer, lat, lon, elev);
-}
-
-/**
- * gis_viewer_project:
- * @viewer: the viewer
- * @lat: the latitude
- * @lon: the latitude
- * @elev: the latitude
- * @px: the project x coordinate
- * @py: the project y coordinate
- * @pz: the project z coordinate
- *
- * Project a latitude, longitude, elevation point to to x, y, and z coordinates
- * in screen space. Useful for drawing orthographic data over a particular point
- * in space. E.g. #GisMarker.
- */
-void gis_viewer_project(GisViewer *viewer,
- gdouble lat, gdouble lon, gdouble elev,
- gdouble *px, gdouble *py, gdouble *pz)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->project)
- g_warning("GisViewer: project - Unimplemented");
- klass->project(viewer, lat, lon, elev, px, py, pz);
-}
-
-/**
- * gis_viewer_clear_height_func:
- * @viewer: the viewer
- *
- * Clears the height function for the entire viewer. Useful when an elevation
- * plugin is unloaded.
- */
-void gis_viewer_clear_height_func(GisViewer *viewer)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->clear_height_func)
- g_warning("GisViewer: clear_height_func - Unimplemented");
- klass->clear_height_func(viewer);
-}
-
-/**
- * gis_viewer_set_height_func:
- * @viewer: the viewer
- * @bounds: the area to set the height function for
- * @height_func: the height function
- * @user_data: user data to pass to the height function
- * @update: %TRUE if the heights inside the bounds should be updated.
- *
- * Set the height function to be used for a given part of the surface..
- */
-void gis_viewer_set_height_func(GisViewer *viewer, GisBounds *bounds,
- GisHeightFunc height_func, gpointer user_data,
- gboolean update)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->set_height_func)
- g_warning("GisViewer: set_height_func - Unimplemented");
- klass->set_height_func(viewer, bounds, height_func, user_data, update);
-}
-
-/**
- * gis_viewer_add:
- * @viewer: the viewer
- * @object: the object to add
- * @level: the level to add the object to
- * @sort: %TRUE if the object should be depth-sorted prior to being drawn
- *
- * Objects which are added to the viewer will be drawn on subsequent renderings
- * if their level of details is adequate.
- *
- * The @level represents the order the object should be drawn in, this is
- * unrelated to the objects actual position in the world.
- *
- * Semi-transparent objects should set @sort to %TRUE so that they are rendered
- * correctly when they overlap other semi-transparent objects.
- *
- * The viewer steals the objects reference. Call g_object_ref if you plan on
- * holding a reference as well.
- *
- * Returns: a handle to be pass to gis_viewer_remove()
- */
-gpointer gis_viewer_add(GisViewer *viewer, GisObject *object,
- gint level, gboolean sort)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->add)
- g_warning("GisViewer: add - Unimplemented");
- return klass->add(viewer, object, level, sort);
-}
-
-/**
- * gis_viewer_remove:
- * @viewer: the viewer
- * @ref: the handle obtained from gis_viewer_add()
- *
- * Remove an object from the viewer. The objects reference count is decremented
- * prior to being removed.
- *
- * Returns: the #GisObject referenced by the handle
- */
-GisObject *gis_viewer_remove(GisViewer *viewer, gpointer ref)
-{
- GisViewerClass *klass = GIS_VIEWER_GET_CLASS(viewer);
- if (!klass->remove)
- g_warning("GisViewer: remove - Unimplemented");
- return klass->remove(viewer, ref);
-}
-
-/****************
- * GObject code *
- ****************/
-G_DEFINE_ABSTRACT_TYPE(GisViewer, gis_viewer, GTK_TYPE_DRAWING_AREA);
-static void gis_viewer_init(GisViewer *viewer)
-{
- g_debug("GisViewer: init");
- /* Default values */
- viewer->time = time(NULL);
- viewer->location[0] = 40;
- viewer->location[1] = -100;
- viewer->location[2] = 1.5*EARTH_R;
- viewer->rotation[0] = 0;
- viewer->rotation[1] = 0;
- viewer->rotation[2] = 0;
-
- g_object_set(viewer, "can-focus", TRUE, NULL);
- gtk_widget_add_events(GTK_WIDGET(viewer),
- GDK_BUTTON_PRESS_MASK |
- GDK_BUTTON_RELEASE_MASK |
- GDK_POINTER_MOTION_MASK |
- GDK_KEY_PRESS_MASK);
-
- g_signal_connect(viewer, "key-press-event", G_CALLBACK(on_key_press), NULL);
- g_signal_connect(viewer, "scroll-event", G_CALLBACK(on_scroll), NULL);
-
- g_signal_connect(viewer, "button-press-event", G_CALLBACK(on_button_press), NULL);
- g_signal_connect(viewer, "button-release-event", G_CALLBACK(on_button_release), NULL);
- g_signal_connect(viewer, "motion-notify-event", G_CALLBACK(on_motion_notify), NULL);
-
- g_signal_connect(viewer, "location-changed", G_CALLBACK(on_view_changed), NULL);
- g_signal_connect(viewer, "rotation-changed", G_CALLBACK(on_view_changed), NULL);
-
- g_signal_connect(viewer, "realize", G_CALLBACK(on_realize), NULL);
-}
-static void gis_viewer_finalize(GObject *gobject)
-{
- g_debug("GisViewer: finalize");
- G_OBJECT_CLASS(gis_viewer_parent_class)->finalize(gobject);
-}
-static void gis_viewer_class_init(GisViewerClass *klass)
-{
- g_debug("GisViewer: class_init");
- GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
- gobject_class->finalize = gis_viewer_finalize;
-
- /**
- * GisViewer::time-changed:
- * @viewer: the viewer.
- * @time: the new time.
- *
- * The ::time-changed signal is emitted when the viewers current time
- * changers.
- */
- signals[SIG_TIME_CHANGED] = g_signal_new(
- "time-changed",
- G_TYPE_FROM_CLASS(gobject_class),
- G_SIGNAL_RUN_LAST,
- 0,
- NULL,
- NULL,
- g_cclosure_marshal_VOID__LONG,
- G_TYPE_NONE,
- 1,
- G_TYPE_LONG);
-
- /**
- * GisViewer::location-changed:
- * @viewer: the viewer.
- * @lat: the new latitude.
- * @lon: the new longitude.
- * @elev: the new elevation.
- *
- * The ::location-changed signal is emitted when the viewers camera
- * location changes.
- */
- signals[SIG_LOCATION_CHANGED] = g_signal_new(
- "location-changed",
- G_TYPE_FROM_CLASS(gobject_class),
- G_SIGNAL_RUN_LAST,
- 0,
- NULL,
- NULL,
- gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
- G_TYPE_NONE,
- 3,
- G_TYPE_DOUBLE,
- G_TYPE_DOUBLE,
- G_TYPE_DOUBLE);
-
- /**
- * GisViewer::rotation-changed:
- * @viewer: the viewer.
- * @x: rotation new around the x axes.
- * @y: rotation new around the y axes.
- * @z: rotation new around the z axes.
- *
- * The ::rotation-changed signal is emitted when the viewers cameras
- * rotation changes.
- */
- signals[SIG_ROTATION_CHANGED] = g_signal_new(
- "rotation-changed",
- G_TYPE_FROM_CLASS(gobject_class),
- G_SIGNAL_RUN_LAST,
- 0,
- NULL,
- NULL,
- gis_cclosure_marshal_VOID__DOUBLE_DOUBLE_DOUBLE,
- G_TYPE_NONE,
- 3,
- G_TYPE_DOUBLE,
- G_TYPE_DOUBLE,
- G_TYPE_DOUBLE);
-
- /**
- * GisViewer::refresh:
- * @viewer: the viewer.
- *
- * The ::refresh signal is emitted when a refresh is needed. If you are
- * using real-time data from a remote server, you should connect to the
- * refresh signal and update the data when necessary.
- */
- signals[SIG_REFRESH] = g_signal_new(
- "refresh",
- G_TYPE_FROM_CLASS(gobject_class),
- G_SIGNAL_RUN_LAST,
- 0,
- NULL,
- NULL,
- g_cclosure_marshal_VOID__VOID,
- G_TYPE_NONE,
- 0);
-
- /**
- * GisViewer::offline:
- * @viewer: the viewer.
- * @offline: %TRUE if the viewer going offline.
- *
- * The ::offline signal is emitted when the viewers offline mode
- * changes.
- */
- signals[SIG_OFFLINE] = g_signal_new(
- "offline",
- G_TYPE_FROM_CLASS(gobject_class),
- G_SIGNAL_RUN_LAST,
- 0,
- NULL,
- NULL,
- g_cclosure_marshal_VOID__BOOLEAN,
- G_TYPE_NONE,
- 1,
- G_TYPE_BOOLEAN);
-}
projects / grits / blobdiff