sm.c

   1 /*
   2 #     vlshow.c
   3 #     Copyright (C) 2006 Joachim Breitner
   4 #
   5 #     This program is free software; you can redistribute it and/or modify
   6 #     it under the terms of the GNU General Public License as published by
   7 #     the Free Software Foundation; either version 2 of the License, or
   8 #     (at your option) any later version.
   9 #
  10 #     This program is distributed in the hope that it will be useful,
  11 #     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 #     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 #     GNU General Public License for more details.
  14 #
  15 #     You should have received a copy of the GNU General Public License
  16 #     along with this program; if not, write to the Free Software
  17 #     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18 */
  19
  20 #include <gtk/gtk.h>
  21 #include <gdk/gdk.h>
  22 #include <pango/pango.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25
  26 static int min(int x, int y) {
  27         return x < y ? x : y;
  28 }
  29
  30
  31 static gboolean quality = TRUE;
  32 static gboolean need_resize = TRUE;
  33
  34 static GtkWidget* window;
  35 static GtkWidget* draw;
  36 static GdkCursor *cursor;
  37 static GtkWidget* quit;
  38 static GtkWidget* tv;
  39 static GtkSettings* settings;
  40 static GtkTextBuffer* tb;
  41 static PangoFontDescription *font;
  42 static PangoLayout* layout;
  43
  44 static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
  45         gdk_window_set_cursor(draw->window, cursor);
  46 }
  47
  48 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  49         if( gtk_text_buffer_get_char_count(tb) )
  50                 gtk_text_buffer_set_text(tb,"",-1);
  51         else
  52                 gtk_main_quit();
  53 }
  54
  55 static char *get_text() {
  56         GtkTextIter start, end;
  57         gtk_text_buffer_get_start_iter(tb,&start);
  58         gtk_text_buffer_get_end_iter(tb,&end);
  59         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  60 }
  61
  62
  63 static void hq(gboolean q, gboolean force){
  64         if (q != quality)
  65                 if (q)
  66                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  67                 else
  68                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  69         else
  70                 if (force)
  71                         gtk_widget_queue_draw(draw);
  72
  73         quality = q;
  74 }
  75
  76 static void redraw() {
  77         const char *text = pango_layout_get_text(layout);
  78         if (strlen(text) > 0) {
  79                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
  80                 int w1, h1;
  81                 pango_layout_get_pixel_size(layout, &w1, &h1);
  82                 if (w1>0 && h1>0) {
  83                         int w2 = draw->allocation.width;
  84                         int h2 = draw->allocation.height;
  85                         gdk_draw_layout(draw->window, gc, (w2-w1)/2,(h2-h1)/2,layout);
  86                         hq(TRUE, FALSE);
  87                 }
  88         }
  89 }
  90
  91 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
  92         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
  93                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
  94
  95                 gchar *txt = gtk_clipboard_wait_for_text(cb);
  96                 if (txt != NULL) {
  97                         gtk_text_buffer_set_text(tb,txt,-1);
  98                         g_free(txt);
  99                 }
 100
 101         }
 102         return FALSE;
 103 }
 104
 105 static void resize() {
 106         int w1, h1, w2, h2;
 107         pango_layout_get_pixel_size(layout, &w1, &h1);
 108         if (w1>0 && h1>0) {
 109                 w2 = draw->allocation.width;
 110                 h2 = draw->allocation.height;
 111                 int s = pango_font_description_get_size(font);
 112                 s = min ((s*w2/w1), (s*h2/h1));
 113                 pango_font_description_set_size(font,s);
 114                 pango_layout_set_font_description(layout, font);
 115                 need_resize = FALSE;
 116         }
 117         else
 118                 need_resize = TRUE;
 119 }
 120
 121
 122 static void newtext(char *text) {
 123         pango_layout_set_text(layout, get_text(), -1);
 124         resize();
 125         hq(FALSE, TRUE);
 126 }
 127
 128 int main(int argc, char **argv) {
 129         GString *input;
 130
 131         gtk_init(&argc, &argv);
 132
 133         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 134         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 135         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 136         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 137         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 138                                             gdk_screen_get_height(screen));
 139         gtk_window_fullscreen(GTK_WINDOW(window));
 140         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 141
 142         settings = gtk_settings_get_default();
 143         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 144         GdkColor white, black;
 145         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 146         gdk_color_parse("white", &white);
 147         gdk_color_parse("black", &black);
 148         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 149         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 150
 151         draw = gtk_drawing_area_new();
 152         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 153         gtk_widget_set_size_request(draw,400,400);
 154         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 155         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 156         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 157         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 158
 159         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 160         GdkColor color;
 161         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 162
 163         tv = gtk_text_view_new();
 164         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 165         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 166         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 167
 168         if (argc > 1)
 169                 if (!strcmp(argv[1], "-") ) {
 170                         // read from stdin
 171                         gchar buf[1024];
 172                         int num;
 173
 174                         input = g_string_new("");
 175
 176                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 177                                 g_string_append_len(input, buf, num);
 178                         }
 179                 } else {
 180                         int i;
 181
 182                         input = g_string_new("");
 183
 184                         for (i = 1; i < argc; i++) {
 185                                 g_string_append(input, argv[i]);
 186
 187                                 if (i < argc - 1) {
 188                                         g_string_append(input, " ");
 189                                 }
 190                         }
 191                 }
 192         else
 193                 input = g_string_new(":-)");
 194
 195         gtk_text_buffer_set_text(tb, input->str, input->len);
 196         GtkTextIter start, end;
 197         gtk_text_buffer_get_bounds(tb, &start, &end);
 198         gtk_text_buffer_select_range(tb, &start, &end);
 199
 200         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 201         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 202         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 203         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 204
 205         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 206         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 207         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 208
 209         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 210         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 211         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 212
 213         gtk_container_add(GTK_CONTAINER(window), vbox);
 214
 215         font = pango_font_description_new();
 216         pango_font_description_set_family(font, "sans-serif");
 217         pango_font_description_set_size(font, 20*PANGO_SCALE);
 218
 219         layout=  gtk_widget_create_pango_layout(draw,get_text());
 220         pango_layout_set_font_description(layout, font);
 221         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 222
 223         GtkAccelGroup *accel = gtk_accel_group_new();
 224         guint key;
 225         GdkModifierType mod;
 226         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 227         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 228         gtk_accelerator_parse("Escape", &key, &mod);
 229         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 230         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 231         gtk_widget_show_all(window);
 232
 233         g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
 234         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 235         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 236
 237         resize();
 238
 239         gtk_main();
 240
 241         return 0;
 242 }