/* $Id: keycontrol.c 4 2008-06-22 09:19:11Z rbock $ */ /* GtkDatabox - An extension to the gtk+ library * Copyright (C) 1998 - 2008 Dr. Roland Bock * * This program 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 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 Lesser General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <gtk/gtk.h> #include <gtkdatabox.h> #include <gtkdatabox_lines.h> #include <gtkdatabox_markers.h> #include <gdk/gdkkeysyms.h> #include <glib/gprintf.h> #include <math.h> #define POINTS 10 /*---------------------------------------------------------------- * databox basics *----------------------------------------------------------------*/ gfloat *X; gfloat *Y; gfloat *markX; gfloat *markY; guint markIndex; gchar markLabel[100]; static void shift_markers (GtkDatabox * box, GtkDataboxMarkers * markers) { markX[0] = X[markIndex]; markY[0] = Y[markIndex]; g_sprintf (markLabel, "(%2.2f, %2.2f)", X[markIndex], Y[markIndex]); gtk_databox_markers_set_label (markers, 1, GTK_DATABOX_MARKERS_TEXT_SW, markLabel, TRUE); gtk_widget_queue_draw (GTK_WIDGET(box)); } static gint key_press_cb (GtkDatabox * box, GdkEventKey * event, GtkDataboxMarkers * markers) { if (event->type != GDK_KEY_PRESS) return FALSE; switch (event->keyval) { case GDK_KP_Right: if (markIndex < POINTS - 1) { markIndex++; shift_markers (box, markers); } break; case GDK_KP_Left: if (markIndex > 0) { markIndex--; shift_markers (box, markers); } break; case GDK_c:; break; case GDK_n: break; case GDK_p: g_printerr ("p"); break; case GDK_h: gtk_databox_zoom_home (box); break; case GDK_o: gtk_databox_zoom_out (box); break; default: break; } return FALSE; } static void create_basics (void) { GtkWidget *window = NULL; GtkWidget *box1; GtkWidget *box2; GtkWidget *close_button; GtkWidget *box; GtkWidget *label; GtkWidget *separator; GtkWidget *table; GtkDataboxGraph *graph; GdkColor color; gfloat left, right, top, bottom; gint i; window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_widget_set_size_request (window, 400, 400); g_signal_connect (GTK_OBJECT (window), "destroy", G_CALLBACK (gtk_main_quit), NULL); gtk_window_set_title (GTK_WINDOW (window), "GtkDatabox: Key Controls"); gtk_container_set_border_width (GTK_CONTAINER (window), 0); box1 = gtk_vbox_new (FALSE, 0); gtk_container_add (GTK_CONTAINER (window), box1); label = gtk_label_new ("As long as the GtkDatabox has the focus,\nthe following keys will work in this example:\nKeypad-Right: Move markers to next data point\nKeypad-Left: Move markers to previous data point\no: zoom out (only useful if you zoomed in previously)\nh: zoom_home (only useful if you zoomed in previously)"); gtk_box_pack_start (GTK_BOX (box1), label, FALSE, FALSE, 0); separator = gtk_hseparator_new (); gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, FALSE, 0); gtk_databox_create_box_with_scrollbars_and_rulers (&box, &table, TRUE, TRUE, TRUE, TRUE); gtk_widget_add_events (box, GDK_KEY_PRESS_MASK); gtk_widget_set_can_default(box, TRUE); gtk_widget_set_can_focus(box, TRUE); gtk_box_pack_start (GTK_BOX (box1), table, TRUE, TRUE, 0); color.red = 16383; color.green = 16383; color.blue = 16383; gtk_widget_modify_bg (box, GTK_STATE_NORMAL, &color); X = g_new0 (gfloat, POINTS); Y = g_new0 (gfloat, POINTS); for (i = 0; i < POINTS; i++) { X[i] = i; Y[i] = 100. * sin (i * 2 * G_PI / (POINTS - 1)); } color.red = 0; color.green = 65535; color.blue = 0; graph = gtk_databox_lines_new (POINTS, X, Y, &color, 1); gtk_databox_graph_add (GTK_DATABOX (box), graph); markX = g_new0 (gfloat, 2); markY = g_new0 (gfloat, 2); color.red = 65535; color.green = 0; color.blue = 0; graph = gtk_databox_markers_new (2, markX, markY, &color, 7, GTK_DATABOX_MARKERS_TRIANGLE); gtk_databox_markers_set_position (GTK_DATABOX_MARKERS (graph), 0, GTK_DATABOX_MARKERS_S); gtk_databox_markers_set_position (GTK_DATABOX_MARKERS (graph), 1, GTK_DATABOX_MARKERS_N); markIndex = 0; shift_markers (GTK_DATABOX (box), GTK_DATABOX_MARKERS (graph)); gtk_databox_graph_add (GTK_DATABOX (box), graph); g_signal_connect (GTK_OBJECT (box), "key_press_event", G_CALLBACK (key_press_cb), graph); gtk_databox_auto_rescale (GTK_DATABOX (box), 0.05); gtk_databox_get_total_limits (GTK_DATABOX (box), &left, &right, &top, &bottom); markX[1] = right; markY[1] = top; separator = gtk_hseparator_new (); gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0); box2 = gtk_vbox_new (FALSE, 10); gtk_container_set_border_width (GTK_CONTAINER (box2), 10); gtk_box_pack_end (GTK_BOX (box1), box2, FALSE, TRUE, 0); close_button = gtk_button_new_with_label ("close"); g_signal_connect_swapped (GTK_OBJECT (close_button), "clicked", G_CALLBACK (gtk_main_quit), GTK_OBJECT (box)); gtk_box_pack_start (GTK_BOX (box2), close_button, TRUE, TRUE, 0); gtk_widget_grab_default (box); gtk_widget_grab_focus (box); gtk_widget_show_all (window); gdk_window_set_cursor (box->window, gdk_cursor_new (GDK_CROSS)); } gint main (gint argc, char *argv[]) { gtk_init (&argc, &argv); create_basics (); gtk_main (); return 0; }