src/about.c

   1 /* logjam - a GTK client for LiveJournal.
   2  * Copyright (C) 2000-2003 Evan Martin <evan@livejournal.com>
   3  */
   4 #include "gtk-all.h"
   5 #include "util-gtk.h"
   6
   7 #include <stdlib.h>
   8
   9 #include "icons.h"
  10 #include "thanks.h"
  11 #include "spawn.h"
  12
  13
  14 /* magic number, defines how long the name will stay centered before scrolling off. */
  15 #define COUNTER_DELAY  (20)
  16
  17
  18 typedef struct {
  19   GtkWidget *win;
  20
  21   GtkWidget *scrollerbox;
  22   GtkWidget *scroller;
  23   int curcontrib;
  24   int timeout;
  25   PangoLayout *layout;
  26   int x, y, counter;
  27
  28   GtkWidget *linkwin;
  29   GdkCursor *cursor;
  30 } AboutUI;
  31
  32
  33 /* randomly permute the list of contributors. */
  34 static void rearrange_contribs (void) {
  35   int i, j;
  36   Contributor t;
  37   srand((unsigned int)time(NULL));
  38   for (i = 0; i < CONTRIBCOUNT; ++i) {
  39     j = rand()%CONTRIBCOUNT;
  40     t = contribs[i];
  41     contribs[i] = contribs[j];
  42     contribs[j] = t;
  43   }
  44 }
  45
  46
  47 static void homepage_cb (GtkWidget *win, GdkEventButton *eb, AboutUI *aui) {
  48   spawn_url(GTK_WINDOW(aui->win), "http://example.com");
  49 }
  50
  51
  52 static GtkWidget *make_title_box (AboutUI *aui) {
  53   GtkWidget *hbox;
  54   GtkWidget *image, *label;
  55   char *text;
  56
  57   image = gtk_image_new_from_stock("logjam-goat", GTK_ICON_SIZE_DIALOG);
  58
  59   label = gtk_label_new(NULL);
  60   text = g_strdup_printf(_("<b><big>LogJam %s</big></b>\n" "<small>Copyright (C) 2000-2004 Evan Martin</small>"), PACKAGE_VERSION);
  61   gtk_label_set_markup(GTK_LABEL(label), text);
  62   g_free(text);
  63   gtk_label_set_justify(GTK_LABEL(label), GTK_JUSTIFY_CENTER);
  64
  65   aui->linkwin = gtk_event_box_new();
  66   g_signal_connect(G_OBJECT(aui->linkwin), "button-press-event", G_CALLBACK(homepage_cb), aui);
  67   aui->cursor = gdk_cursor_new(GDK_HAND2);
  68   gtk_container_add(GTK_CONTAINER(aui->linkwin), label);
  69
  70   hbox = gtk_hbox_new(FALSE, 10);
  71   gtk_container_set_border_width(GTK_CONTAINER(hbox), 5);
  72   gtk_box_pack_start(GTK_BOX(hbox), image, FALSE, FALSE, 0);
  73   gtk_box_pack_start(GTK_BOX(hbox), aui->linkwin, TRUE, FALSE, 0);
  74
  75   return hbox;
  76 }
  77
  78
  79 static gboolean showthanks_cb (AboutUI *aui) {
  80   int w, h;
  81
  82   if (!aui->layout || aui->y > aui->scroller->allocation.height) {
  83     if (aui->layout) {
  84       g_object_unref(G_OBJECT(aui->layout));
  85       aui->curcontrib = (aui->curcontrib + 1) % CONTRIBCOUNT;
  86       gtk_tooltips_set_tip(app.tooltips, aui->scrollerbox, _(contribs[aui->curcontrib].contribution), NULL);
  87     }
  88     aui->layout = gtk_widget_create_pango_layout(aui->scroller, contribs[aui->curcontrib].name);
  89     pango_layout_get_pixel_size(aui->layout, &w, &h);
  90     gtk_widget_set_size_request(aui->scroller, w, h);
  91     gtk_widget_queue_resize(aui->scroller);
  92     aui->y = -h;
  93   } else {
  94     /* advance y, except when we get to zero we cycle through counter once. */
  95     if (aui->y == 0) ++aui->counter; else ++aui->y;
  96     if (aui->counter == COUNTER_DELAY) {
  97       aui->counter = 0;
  98       ++aui->y;
  99     }
 100   }
 101   if (aui->scroller->window) gdk_window_invalidate_rect(aui->scroller->window, NULL, FALSE);
 102   return TRUE; /* continue running. */
 103 }
 104
 105
 106 static void button_cb (GtkWidget *widget, GdkEventExpose *event, AboutUI *aui) {
 107   /* force advance to next name. */
 108   aui->y = aui->scroller->allocation.height+1;
 109   showthanks_cb(aui);
 110   aui->y = 0;
 111   aui->counter = 0;
 112 }
 113
 114
 115 static void expose_cb (GtkWidget *widget, GdkEventExpose *event, AboutUI *aui) {
 116   gtk_paint_layout(widget->style, widget->window, GTK_STATE_NORMAL, FALSE, &event->area, widget, "label", aui->x, aui->y, aui->layout);
 117 }
 118
 119
 120 static void configure_cb (GtkWidget *widget, GdkEventConfigure *e, AboutUI *aui) {
 121   int w;
 122   pango_layout_get_pixel_size(aui->layout, &w, NULL);
 123   aui->x = (widget->allocation.width-w)/2;
 124   gdk_window_invalidate_rect(widget->window, NULL, FALSE);
 125 }
 126
 127
 128 static void destroy_cb (GtkWidget *win, AboutUI *aui) {
 129   if (aui->layout) g_object_unref(G_OBJECT(aui->layout));
 130   if (aui->timeout) g_source_remove(aui->timeout);
 131   if (aui->cursor) gdk_cursor_unref(aui->cursor);
 132   g_free(aui);
 133 }
 134
 135
 136 void about_dlg (GtkWindow *mainwin) {
 137   AboutUI *aui;
 138   GtkWidget *mainbox, *fh;
 139
 140   aui = g_new0(AboutUI, 1);
 141
 142   aui->win = gtk_dialog_new_with_buttons(_("About LogJam"), mainwin, GTK_DIALOG_DESTROY_WITH_PARENT, GTK_STOCK_CLOSE, GTK_RESPONSE_CLOSE, NULL);
 143   g_signal_connect_swapped(G_OBJECT(aui->win), "response", G_CALLBACK(gtk_widget_destroy), aui->win);
 144   g_signal_connect(G_OBJECT(aui->win), "destroy", G_CALLBACK(destroy_cb), aui);
 145
 146   /* make the bounding padding box */
 147   mainbox = gtk_vbox_new(FALSE, 5);
 148
 149   gtk_box_pack_start(GTK_BOX(mainbox), make_title_box(aui), FALSE, FALSE, 0);
 150
 151   fh = gtk_label_new(_("This program is free software; you can redistribute it and/or modify\n"
 152                        "it under the terms of the GNU General Public License as published by\n"
 153                        "the Free Software Foundation; either version 2 of the License, or\n"
 154                        "(at your option) any later version."));
 155
 156   gtk_box_pack_start(GTK_BOX(mainbox), fh, TRUE, TRUE, 0);
 157
 158   gtk_box_pack_start(GTK_BOX(mainbox), gtk_label_new(_("LogJam was made with the help of many people, including:")), FALSE, FALSE, 0);
 159
 160   aui->scrollerbox = gtk_event_box_new();
 161   gtk_box_pack_start(GTK_BOX(mainbox), aui->scrollerbox, FALSE, FALSE, 0);
 162
 163   aui->scroller = gtk_drawing_area_new();
 164   rearrange_contribs();
 165   showthanks_cb(aui);
 166   gtk_widget_add_events(aui->scroller, GDK_BUTTON_PRESS_MASK);
 167   g_signal_connect(G_OBJECT(aui->scroller), "button-press-event", G_CALLBACK(button_cb), aui);
 168   g_signal_connect(G_OBJECT(aui->scroller), "expose-event", G_CALLBACK(expose_cb), aui);
 169   g_signal_connect(G_OBJECT(aui->scroller), "configure-event", G_CALLBACK(configure_cb), aui);
 170   gtk_container_add(GTK_CONTAINER(aui->scrollerbox), aui->scroller);
 171
 172   aui->timeout = g_timeout_add(50, (GSourceFunc) showthanks_cb, aui);
 173
 174   jam_dialog_set_contents(GTK_DIALOG(aui->win), mainbox);
 175
 176   gtk_widget_realize(aui->win);
 177   gtk_widget_realize(aui->linkwin);
 178   gdk_window_set_cursor(aui->linkwin->window, aui->cursor);
 179   gtk_widget_show(aui->win);
 180   showthanks_cb(aui);
 181 }