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 static gboolean need_quick = TRUE;
  34
  35 static GtkWidget* window;
  36 static GtkWidget* draw;
  37 static GdkCursor *cursor;
  38 static GtkWidget* quit;
  39 static GtkWidget* tv;
  40 static GtkSettings* settings;
  41 static GtkTextBuffer* tb;
  42 static PangoFontDescription *font;
  43 static PangoLayout* layout;
  44
  45 static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
  46         gdk_window_set_cursor(draw->window, cursor);
  47 }
  48
  49 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  50         gtk_text_buffer_set_text(tb,"",-1);
  51 }
  52
  53 static char *get_text() {
  54         GtkTextIter start, end;
  55         gtk_text_buffer_get_start_iter(tb,&start);
  56         gtk_text_buffer_get_end_iter(tb,&end);
  57         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  58 }
  59
  60
  61 static void hq(gboolean q, gboolean force){
  62         if (q != quality)
  63                 if (q)
  64                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  65                 else
  66                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  67         else
  68                 if (force)
  69                         gtk_widget_queue_draw(draw);
  70
  71         quality = q;
  72 }
  73
  74 static void redraw() {
  75         const char *text = pango_layout_get_text(layout);
  76         if (strlen(text) > 0) {
  77                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
  78                 int w1, h1;
  79                 pango_layout_get_pixel_size(layout, &w1, &h1);
  80                 if (w1>0 && h1>0) {
  81                         int w2 = draw->allocation.width;
  82                         int h2 = draw->allocation.height;
  83                         gdk_draw_layout(draw->window, gc, (w2-w1)/2,(h2-h1)/2,layout);
  84                         hq(TRUE, FALSE);
  85                 }
  86         }
  87 }
  88
  89 static void resize() {
  90         int w1, h1, w2, h2;
  91         pango_layout_get_pixel_size(layout, &w1, &h1);
  92         if (w1>0 && h1>0) {
  93                 w2 = draw->allocation.width;
  94                 h2 = draw->allocation.height;
  95                 int s = pango_font_description_get_size(font);
  96                 s = min ((s*w2/w1), (s*h2/h1));
  97                 pango_font_description_set_size(font,s);
  98                 pango_layout_set_font_description(layout, font);
  99                 need_resize = FALSE;
 100         }
 101         else
 102                 need_resize = TRUE;
 103 }
 104
 105
 106 static void newtext(char *text) {
 107         pango_layout_set_text(layout, get_text(), -1);
 108         resize();
 109         hq(FALSE, TRUE);
 110 }
 111
 112 int main(int argc, char **argv) {
 113         gtk_init(&argc, &argv);
 114
 115         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 116         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 117         gtk_window_fullscreen(GTK_WINDOW(window));
 118
 119         settings = gtk_settings_get_default();
 120         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 121         GdkColor white, black;
 122         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 123         gdk_color_parse("white", &white);
 124         gdk_color_parse("black", &black);
 125         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 126         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 127
 128         draw = gtk_drawing_area_new();
 129         gtk_widget_set_size_request(draw,400,400);
 130         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 131         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 132         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 133
 134         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 135         GdkColor color;
 136         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 137
 138         tv = gtk_text_view_new();
 139         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 140         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 141         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 142
 143         if (argc > 1)
 144                 //tb.set_text(" ".join(sys.argv[1:]))
 145                 gtk_text_buffer_set_text(tb, argv[1], -1);
 146         else
 147                 gtk_text_buffer_set_text(tb, ":-)", -1);
 148
 149         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 150         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 151         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 152         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 153
 154         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 155         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 156         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 157
 158         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 159         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 160         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 161
 162         gtk_container_add(GTK_CONTAINER(window), vbox);
 163
 164         font = pango_font_description_new();
 165         pango_font_description_set_family(font, "sans-serif");
 166         pango_font_description_set_size(font, 20*PANGO_SCALE);
 167
 168         layout=  gtk_widget_create_pango_layout(draw,get_text());
 169         pango_layout_set_font_description(layout, font);
 170         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 171
 172         GtkAccelGroup *accel = gtk_accel_group_new();
 173         guint key;
 174         GdkModifierType mod;
 175         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 176         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 177         gtk_accelerator_parse("Escape", &key, &mod);
 178         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 179         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 180         gtk_widget_show_all(window);
 181
 182         g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
 183         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 184         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 185
 186         gtk_main();
 187 }