glue/search-entry.c

   1 #include "search-entry.h"
   2 #include "search-entry-watermark.h"
   3
   4 #include <librsvg/rsvg.h>
   5 #include <string.h>
   6
   7 typedef struct {
   8         GdkPixbuf *watermark;
   9         int width, height;
  10 } SearchEntryPrivate;
  11 #define SEARCH_ENTRY_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), SEARCH_TYPE_ENTRY, SearchEntryPrivate))
  12
  13 static void search_entry_class_init (SearchEntryClass *);
  14 static void search_entry_init       (SearchEntry *);
  15 static void search_entry_finalize   (GObject *);
  16
  17 static void search_entry_realize           (GtkWidget      *widget);
  18 static gboolean search_entry_expose_event  (GtkWidget      *widget,
  19                                             GdkEventExpose *event);
  20
  21 G_DEFINE_TYPE (SearchEntry, search_entry, GTK_TYPE_ENTRY)
  22
  23 static void
  24 search_entry_class_init (SearchEntryClass *search_entry_class)
  25 {
  26         GObjectClass *g_obj_class = G_OBJECT_CLASS (search_entry_class);
  27         GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (search_entry_class);
  28
  29         g_type_class_add_private (search_entry_class, sizeof (SearchEntryPrivate));
  30
  31         widget_class->realize = search_entry_realize;
  32         widget_class->expose_event = search_entry_expose_event;
  33
  34         g_obj_class->finalize = search_entry_finalize;
  35 }
  36
  37 static void
  38 search_entry_init (SearchEntry *entry)
  39 {
  40 }
  41
  42 static void
  43 search_entry_finalize (GObject *object)
  44 {
  45         SearchEntryPrivate *priv = SEARCH_ENTRY_GET_PRIVATE (object);
  46
  47         if (priv->watermark)
  48                 g_object_unref (priv->watermark);
  49
  50         G_OBJECT_CLASS (search_entry_parent_class)->finalize (object);
  51 }
  52
  53
  54 static void
  55 rsvg_size_callback (int *width, int *height, gpointer user_data)
  56 {
  57         SearchEntryPrivate *priv = user_data;
  58
  59         *width = priv->width = priv->height * (double)*width / (double)*height;
  60         *height = priv->height;
  61 }
  62
  63 static void
  64 search_entry_realize (GtkWidget *widget)
  65 {
  66         SearchEntryPrivate *priv = SEARCH_ENTRY_GET_PRIVATE (widget);
  67         int height;
  68         GdkColor *gdkcolor;
  69         char *svg, color[7];
  70         RsvgHandle *rsvg;
  71
  72         GTK_WIDGET_CLASS (search_entry_parent_class)->realize (widget);
  73
  74         gdk_window_get_geometry (GTK_ENTRY (widget)->text_area,
  75                                  NULL, NULL, NULL, &height, NULL);
  76
  77         if (height - 2 == priv->height)
  78                 return;
  79         priv->height = height - 2;
  80
  81         gdkcolor = &widget->style->fg[GTK_WIDGET_STATE (widget)];
  82         snprintf (color, 6, "%02x%02x%02x",
  83                   gdkcolor->red >> 8,
  84                   gdkcolor->green >> 8,
  85                   gdkcolor->blue >> 8);
  86         svg = g_strdup_printf (SEARCH_ENTRY_WATERMARK_SVG, color, color);
  87
  88         rsvg = rsvg_handle_new ();
  89         rsvg_handle_set_size_callback (rsvg, rsvg_size_callback, priv, NULL);
  90         rsvg_handle_write (rsvg, (const guchar *)svg, strlen (svg), NULL);
  91         rsvg_handle_close (rsvg, NULL);
  92         g_free (svg);
  93
  94         if (priv->watermark)
  95                 g_object_unref (priv->watermark);
  96         priv->watermark = rsvg_handle_get_pixbuf (rsvg);
  97         rsvg_handle_free (rsvg);
  98 }
  99
 100 static gboolean
 101 search_entry_expose_event (GtkWidget *widget, GdkEventExpose *event)
 102 {
 103         SearchEntryPrivate *priv = SEARCH_ENTRY_GET_PRIVATE (widget);
 104         GTK_WIDGET_CLASS (search_entry_parent_class)->expose_event (widget, event);
 105
 106         if (event->window == GTK_ENTRY (widget)->text_area) {
 107                 int width, height, x;
 108
 109                 if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_LTR) {
 110                         gdk_drawable_get_size (event->window, &width, &height);
 111                         x = width - priv->width - 1;
 112                 } else
 113                         x = 1;
 114                 gdk_draw_pixbuf (event->window,
 115                                  widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 116                                  priv->watermark, 0, 0, x, 1,
 117                                  priv->width, priv->height,
 118                                  GDK_RGB_DITHER_NORMAL, 0, 0);
 119         }
 120
 121         return FALSE;
 122 }
 123
 124
 125 GtkWidget *
 126 search_entry_new (void)
 127 {
 128         return g_object_new (SEARCH_TYPE_ENTRY, NULL);
 129 }