*/
/**
- * SECTION:gis-object
+ * SECTION:grits-object
* @short_description: Base class for drawing operations
*
- * Objects in libgis are things which can be added to the viewer and will be
+ * Objects in grits are things which can be added to the viewer and will be
* displayed to the user. Each object has information such as it's location and
* level of detail which are used by the viewer to determine which objects
* should be drawn.
*
- * Each #GisObject is also a #GObject, but not every GObject in libgis is a
- * GisObject. The "Object" part of the name is just coincidence.
+ * Each #GritsObject is also a #GObject, but not every GObject in grits is a
+ * GritsObject. The "Object" part of the name is just coincidence.
*/
#include <config.h>
#include <math.h>
#include <GL/gl.h>
-#include "gis-object.h"
+#include "grits-object.h"
+/* Constants */
+enum {
+ SIG_ENTER,
+ SIG_LEAVE,
+ SIG_CLICKED,
+ SIG_BUTTON_PRESS,
+ SIG_BUTTON_RELEASE,
+ SIG_KEY_PRESS,
+ SIG_KEY_RELEASE,
+ SIG_MOTION,
+ NUM_SIGNALS,
+};
+static guint signals[NUM_SIGNALS];
-/*************
- * GisObject *
- *************/
-/**
- * gis_object_draw:
- * @object: the object
- * @opengl: the viewer the object is being displayed in
- *
- * Perform any OpenGL commands necessasairy to draw the object.
- *
- * The GL_PROJECTION and GL_MODELVIEW matricies and GL_ALL_ATTRIB_BITS will be
- * restored to the default state after the call to draw.
- */
-void gis_object_draw(GisObject *object, GisOpenGL *opengl)
+void grits_object_pickdraw(GritsObject *object, GritsOpenGL *opengl, gboolean pick)
{
- GisObjectClass *klass = GIS_OBJECT_GET_CLASS(object);
+ GritsObjectClass *klass = GRITS_OBJECT_GET_CLASS(object);
if (!klass->draw) {
- g_warning("GisObject: draw - Unimplemented");
+ g_warning("GritsObject: draw - Unimplemented");
return;
}
if (object->hidden)
return;
- /* Skip out of range objects */
- if (object->lod > 0) {
+ /* Support GritsTester */
+ if (!GRITS_IS_OPENGL(opengl)) {
+ g_debug("GritsObject: draw - drawing raw object");
+ klass->draw(object, opengl);
+ return;
+ }
+
+ /* Calculae distance for LOD and horizon tests */
+ GritsPoint *center = &object->center;
+ if ((!(object->skip & GRITS_SKIP_LOD) ||
+ !(object->skip & GRITS_SKIP_HORIZON)) &&
+ (center->elev != -EARTH_R)) {
/* LOD test */
gdouble eye[3], obj[3];
- gis_viewer_get_location(GIS_VIEWER(opengl), &eye[0], &eye[1], &eye[2]);
+ grits_viewer_get_location(GRITS_VIEWER(opengl),
+ &eye[0], &eye[1], &eye[2]);
gdouble elev = eye[2];
- lle2xyz(eye[0], eye[1], eye[2], &eye[0], &eye[1], &eye[2]);
- lle2xyz(object->center.lat, object->center.lon, object->center.elev,
- &obj[0], &obj[1], &obj[2]);
+ lle2xyz(eye[0], eye[1], eye[2],
+ &eye[0], &eye[1], &eye[2]);
+ lle2xyz(center->lat, center->lon, center->elev,
+ &obj[0], &obj[1], &obj[2]);
gdouble dist = distd(obj, eye);
- if (object->lod < dist)
- return;
- /* Horizon testing */
- gdouble c = EARTH_R+elev;
- gdouble a = EARTH_R;
- gdouble horizon = sqrt(c*c - a*a);
- if (dist > horizon)
- return;
+ /* Level of detail test */
+ if (!(object->skip & GRITS_SKIP_LOD)
+ && object->lod > 0) {
+ if (object->lod < dist)
+ return;
+ }
+
+ /* Horizon test */
+ if (!(object->skip & GRITS_SKIP_HORIZON)) {
+ gdouble c = EARTH_R+elev;
+ gdouble a = EARTH_R;
+ gdouble horizon = sqrt(c*c - a*a);
+ if (dist > horizon)
+ return;
+ }
}
/* Save state, draw, restore state */
g_mutex_lock(opengl->sphere_lock);
- glPushAttrib(GL_ALL_ATTRIB_BITS);
- glMatrixMode(GL_PROJECTION); glPushMatrix();
- glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPushAttrib(GL_ALL_ATTRIB_BITS);
+ glMatrixMode(GL_PROJECTION); glPushMatrix();
+ glMatrixMode(GL_MODELVIEW); glPushMatrix();
+ }
- klass->draw(object, opengl);
+ if (!(object->skip & GRITS_SKIP_CENTER))
+ grits_viewer_center_position(GRITS_VIEWER(opengl),
+ object->center.lat,
+ object->center.lon,
+ object->center.elev);
- glPopAttrib();
- glMatrixMode(GL_PROJECTION); glPopMatrix();
- glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ if (pick && klass->pick)
+ klass->pick(object, opengl);
+ else
+ klass->draw(object, opengl);
+
+ if (!(object->skip & GRITS_SKIP_STATE)) {
+ glPopAttrib();
+ glMatrixMode(GL_PROJECTION); glPopMatrix();
+ glMatrixMode(GL_MODELVIEW); glPopMatrix();
+ }
g_mutex_unlock(opengl->sphere_lock);
}
+/**
+ * grits_object_draw:
+ * @object: the object
+ * @opengl: the viewer the object is being displayed in
+ *
+ * Perform any OpenGL commands necessasairy to draw the object.
+ *
+ * The GL_PROJECTION and GL_MODELVIEW matricies and GL_ALL_ATTRIB_BITS will be
+ * restored to the default state after the call to draw.
+ */
+void grits_object_draw(GritsObject *object, GritsOpenGL *opengl)
+{
+ grits_object_pickdraw(object, opengl, FALSE);
+}
+
+void grits_object_hide(GritsObject *object, gboolean hidden)
+{
+ GritsObjectClass *klass = GRITS_OBJECT_GET_CLASS(object);
+ object->hidden = hidden;
+ if (klass->hide)
+ klass->hide(object, hidden);
+}
+
+void grits_object_queue_draw(GritsObject *object)
+{
+ if (object->viewer)
+ gtk_widget_queue_draw(GTK_WIDGET(object->viewer));
+}
+
+/* Event handling */
+void grits_object_pick_begin(GritsObject *object, GritsOpenGL *opengl)
+{
+ object->state.picked = FALSE;
+
+ /* Check for connected signals */
+ for (int i = 0; i < NUM_SIGNALS; i++) {
+ if (g_signal_has_handler_pending(object, signals[i], 0, FALSE)) {
+ /* Someone is watching, render the object _once_ */
+ glPushName((guint)object);
+ grits_object_pickdraw(object, opengl, TRUE);
+ glPopName();
+ return;
+ }
+ }
+}
+
+void grits_object_pick_pointer(GritsObject *object, double x, double y)
+{
+ object->state.picked = TRUE;
+}
+
+void grits_object_pick_end(GritsObject *object)
+{
+ if (object->state.picked) {
+ if (!object->state.selected)
+ g_signal_emit(object, signals[SIG_ENTER], 0);
+ object->state.selected = TRUE;
+ } else {
+ if (object->state.selected)
+ g_signal_emit(object, signals[SIG_LEAVE], 0);
+ object->state.selected = FALSE;
+ }
+}
+
+void grits_object_event(GritsObject *object, GdkEvent *event)
+{
+ const int map[GDK_EVENT_LAST] = {
+ [GDK_BUTTON_PRESS ] SIG_BUTTON_PRESS,
+ [GDK_2BUTTON_PRESS ] SIG_BUTTON_PRESS,
+ [GDK_3BUTTON_PRESS ] SIG_BUTTON_PRESS,
+ [GDK_BUTTON_RELEASE] SIG_BUTTON_RELEASE,
+ [GDK_KEY_PRESS ] SIG_KEY_PRESS,
+ [GDK_KEY_RELEASE ] SIG_KEY_RELEASE,
+ [GDK_MOTION_NOTIFY ] SIG_MOTION,
+ };
+ if (!object->state.selected)
+ return;
+ guint sig = map[event->type];
+
+ /* Handle button click */
+ if (sig == SIG_BUTTON_PRESS)
+ object->state.clicking = TRUE;
+ if (sig == SIG_BUTTON_RELEASE && object->state.clicking)
+ g_signal_emit(object, signals[SIG_CLICKED], 0, event);
+ if (sig == SIG_BUTTON_RELEASE || sig == SIG_MOTION)
+ object->state.clicking = FALSE;
+
+ /* Emit this signal */
+ if (!g_signal_has_handler_pending(object, signals[sig], 0, FALSE))
+ return;
+ g_signal_emit(object, signals[sig], 0, event);
+}
+
/* GObject stuff */
-G_DEFINE_ABSTRACT_TYPE(GisObject, gis_object, G_TYPE_OBJECT);
-static void gis_object_init(GisObject *object)
+G_DEFINE_ABSTRACT_TYPE(GritsObject, grits_object, G_TYPE_OBJECT);
+static void grits_object_init(GritsObject *object)
{
+ object->center.lat = 0;
+ object->center.lon = 0;
+ object->center.elev = -EARTH_R;
}
-static void gis_object_class_init(GisObjectClass *klass)
+static void grits_object_class_init(GritsObjectClass *klass)
{
+ GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
+
+ /**
+ * GritsObject::enter:
+ * @object: the object.
+ *
+ * The ::enter signal is emitted when the pointer moves over the object
+ */
+ signals[SIG_ENTER] = g_signal_new(
+ "enter",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+ /**
+ * GritsViewer::leave:
+ * @object: the object.
+ *
+ * The ::leave signal is emitted when the pointer moves away from the
+ * object
+ */
+ signals[SIG_LEAVE] = g_signal_new(
+ "leave",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+ /**
+ * GritsViewer::clicked:
+ * @object: the object.
+ *
+ * The ::clicked signal is emitted when the user clicks on the object
+ */
+ signals[SIG_CLICKED] = g_signal_new(
+ "clicked",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__VOID,
+ G_TYPE_NONE,
+ 0);
+
+ /**
+ * GritsViewer::button-press:
+ * @object: the object.
+ * @event: the GdkEventButton which triggered this signal
+ *
+ * The ::button-press signal is emitted when a button (typically from a
+ * mouse) is pressed.
+ */
+ signals[SIG_BUTTON_PRESS] = g_signal_new(
+ "button-press",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_POINTER);
+
+ /**
+ * GritsViewer::button-release:
+ * @object: the object.
+ * @event: the GdkEventButton which triggered this signal
+ *
+ * The ::button-release signal is emitted when a button (typically from
+ * a mouse) is released.
+ */
+ signals[SIG_BUTTON_RELEASE] = g_signal_new(
+ "button-release",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_POINTER);
+
+ /**
+ * GritsViewer::key-press:
+ * @object: the object.
+ * @event: the GdkEventKey which triggered this signal
+ *
+ * The ::key-press signal is emitted when a key is pressed.
+ */
+ signals[SIG_KEY_PRESS] = g_signal_new(
+ "key-press",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_POINTER);
+
+ /**
+ * GritsViewer::key-release:
+ * @object: the object.
+ * @event: the GdkEventKey which triggered this signal
+ *
+ * The ::key-release signal is emitted when a key is released.
+ */
+ signals[SIG_KEY_RELEASE] = g_signal_new(
+ "key-release",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_POINTER);
+
+ /**
+ * GritsViewer::motion:
+ * @object: the object.
+ * @event: the GdkEventMotion which triggered this signal
+ *
+ * The ::motion signal is emitted the pointer moves over the object
+ */
+ signals[SIG_MOTION] = g_signal_new(
+ "motion",
+ G_TYPE_FROM_CLASS(gobject_class),
+ G_SIGNAL_RUN_LAST,
+ 0,
+ NULL,
+ NULL,
+ g_cclosure_marshal_VOID__POINTER,
+ G_TYPE_NONE,
+ 1,
+ G_TYPE_POINTER);
}
projects / grits / blobdiff