1 | /* -*- mode: c; style: linux -*- */ |
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2 | |
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3 | /* preview-file-selection.c |
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4 | * Copyright (C) 2001 Ximian, Inc. |
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5 | * |
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6 | * Written by Rachel Hestilow <hestilow@ximian.com> |
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7 | * |
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8 | * This program is free software; you can redistribute it and/or modify |
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9 | * it under the terms of the GNU General Public License as published by |
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10 | * the Free Software Foundation; either version 2, or (at your option) |
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11 | * any later version. |
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12 | * |
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13 | * This program is distributed in the hope that it will be useful, |
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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16 | * GNU General Public License for more details. |
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17 | * |
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18 | * You should have received a copy of the GNU General Public License |
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19 | * along with this program; if not, write to the Free Software |
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20 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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21 | * 02111-1307, USA. |
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22 | */ |
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23 | |
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24 | #ifdef HAVE_CONFIG_H |
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25 | # include "config.h" |
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26 | #endif |
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27 | |
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28 | #include <libgnome/libgnome.h> |
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29 | #include <gtk/gtkimage.h> |
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30 | #include <gtk/gtkhbox.h> |
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31 | #include <gtk/gtkframe.h> |
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32 | #include <gtk/gtklabel.h> |
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33 | #include <gtk/gtktreeview.h> |
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34 | #include <gtk/gtkmain.h> |
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35 | #include "preview-file-selection.h" |
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36 | |
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37 | #define SCALE 100 |
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38 | |
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39 | struct _PreviewFileSelectionPrivate |
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40 | { |
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41 | GtkWidget *preview; |
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42 | GtkWidget *label; |
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43 | }; |
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44 | |
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45 | enum |
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46 | { |
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47 | PROP_0, |
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48 | PROP_DO_PREVIEW |
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49 | }; |
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50 | |
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51 | static GObjectClass *parent_class; |
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52 | |
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53 | static void preview_file_selection_set_property (GObject *object, guint arg_id, const GValue *value, GParamSpec *spec); |
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54 | static void preview_file_selection_get_property (GObject *object, guint arg_id, GValue *value, GParamSpec *spec); |
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55 | |
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56 | static void |
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57 | preview_file_selection_finalize (GObject *object) |
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58 | { |
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59 | PreviewFileSelection *fsel = PREVIEW_FILE_SELECTION (object); |
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60 | |
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61 | g_free (fsel->priv); |
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62 | |
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63 | parent_class->finalize (object); |
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64 | } |
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65 | |
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66 | static void |
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67 | preview_file_selection_class_init (GObjectClass *object_class) |
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68 | { |
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69 | parent_class = g_type_class_ref (GTK_TYPE_FILE_SELECTION); |
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70 | |
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71 | object_class->set_property = preview_file_selection_set_property; |
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72 | object_class->get_property = preview_file_selection_get_property; |
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73 | object_class->finalize = preview_file_selection_finalize; |
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74 | |
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75 | g_object_class_install_property |
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76 | (object_class, PROP_DO_PREVIEW, |
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77 | g_param_spec_boolean ("do_preview", |
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78 | "Preview images", |
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79 | "Whether to preview images", |
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80 | TRUE, |
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81 | G_PARAM_READWRITE | |
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82 | G_PARAM_CONSTRUCT_ONLY)); |
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83 | } |
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84 | |
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85 | static void |
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86 | preview_file_selection_init (GObject *object) |
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87 | { |
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88 | PreviewFileSelection *fsel = PREVIEW_FILE_SELECTION (object); |
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89 | |
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90 | fsel->priv = g_new0 (PreviewFileSelectionPrivate, 1); |
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91 | } |
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92 | |
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93 | GType |
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94 | preview_file_selection_get_type (void) |
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95 | { |
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96 | static GType type = 0; |
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97 | |
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98 | if (!type) |
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99 | { |
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100 | GTypeInfo info = |
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101 | { |
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102 | sizeof (PreviewFileSelectionClass), |
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103 | NULL, |
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104 | NULL, |
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105 | (GClassInitFunc) preview_file_selection_class_init, |
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106 | NULL, |
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107 | NULL, |
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108 | sizeof (PreviewFileSelection), |
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109 | 0, |
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110 | (GInstanceInitFunc) preview_file_selection_init, |
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111 | NULL |
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112 | }; |
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113 | |
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114 | type = g_type_register_static (GTK_TYPE_FILE_SELECTION, |
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115 | "PreviewFileSelection", |
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116 | &info, 0); |
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117 | } |
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118 | |
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119 | return type; |
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120 | } |
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121 | |
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122 | GtkWidget* |
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123 | preview_file_selection_new (const gchar *title, gboolean do_preview) |
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124 | { |
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125 | return GTK_WIDGET ( |
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126 | g_object_new (PREVIEW_FILE_SELECTION_TYPE, |
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127 | "title", title, |
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128 | "do_preview", do_preview, |
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129 | NULL)); |
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130 | } |
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131 | |
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132 | GdkPixbuf* |
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133 | preview_file_selection_intelligent_scale (GdkPixbuf *buf, guint scale) |
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134 | { |
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135 | GdkPixbuf *scaled; |
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136 | int w, h; |
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137 | guint ow = gdk_pixbuf_get_width (buf); |
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138 | guint oh = gdk_pixbuf_get_height (buf); |
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139 | |
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140 | if (ow <= scale && oh <= scale) |
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141 | scaled = gdk_pixbuf_ref (buf); |
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142 | else |
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143 | { |
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144 | if (ow > oh) |
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145 | { |
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146 | w = scale; |
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147 | h = scale * (((double)oh)/(double)ow); |
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148 | } |
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149 | else |
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150 | { |
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151 | h = scale; |
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152 | w = scale * (((double)ow)/(double)ow); |
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153 | } |
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154 | |
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155 | scaled = gdk_pixbuf_scale_simple (buf, w, h, GDK_INTERP_BILINEAR); |
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156 | } |
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157 | |
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158 | return scaled; |
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159 | } |
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160 | |
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161 | static void |
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162 | preview_file_selection_update (PreviewFileSelection *fsel, gpointer data) |
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163 | { |
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164 | GdkPixbuf *buf; |
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165 | const gchar *filename; |
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166 | |
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167 | g_return_if_fail (IS_PREVIEW_FILE_SELECTION (fsel)); |
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168 | |
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169 | filename = gtk_file_selection_get_filename (GTK_FILE_SELECTION (fsel)); |
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170 | if (filename && (buf = gdk_pixbuf_new_from_file (filename, NULL))) |
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171 | { |
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172 | int w, h; |
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173 | char *size; |
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174 | GdkPixbuf *scaled = preview_file_selection_intelligent_scale (buf, SCALE); |
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175 | gtk_image_set_from_pixbuf (GTK_IMAGE (fsel->priv->preview), |
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176 | scaled); |
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177 | g_object_unref (scaled); |
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178 | |
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179 | w = gdk_pixbuf_get_width (buf); |
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180 | h = gdk_pixbuf_get_height (buf); |
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181 | |
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182 | size = g_strdup_printf ("%d x %d", w, h); |
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183 | gtk_label_set_text (GTK_LABEL (fsel->priv->label), size); |
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184 | g_free (size); |
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185 | |
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186 | g_object_unref (buf); |
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187 | } |
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188 | else { |
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189 | gtk_image_set_from_file (GTK_IMAGE (fsel->priv->preview), NULL); |
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190 | gtk_label_set_text (GTK_LABEL (fsel->priv->label), " "); |
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191 | } |
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192 | } |
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193 | |
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194 | static void |
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195 | preview_file_selection_add_preview (PreviewFileSelection *fsel) |
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196 | { |
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197 | GtkWidget *hbox, *frame, *vbox; |
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198 | |
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199 | g_return_if_fail (IS_PREVIEW_FILE_SELECTION (fsel)); |
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200 | |
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201 | hbox = GTK_FILE_SELECTION (fsel)->file_list; |
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202 | do |
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203 | { |
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204 | hbox = hbox->parent; |
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205 | if (!hbox) |
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206 | { |
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207 | g_warning (_("Can't find an hbox, using a normal file selection")); |
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208 | return; |
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209 | } |
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210 | } while (!GTK_IS_HBOX (hbox)); |
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211 | |
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212 | frame = gtk_frame_new (_("Preview")); |
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213 | gtk_widget_set_size_request (frame, SCALE + 10, SCALE + 10); |
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214 | gtk_widget_show (frame); |
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215 | gtk_box_pack_end (GTK_BOX (hbox), frame, FALSE, FALSE, 0); |
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216 | |
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217 | vbox = gtk_vbox_new (FALSE, 2); |
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218 | gtk_widget_show (vbox); |
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219 | gtk_container_add (GTK_CONTAINER (frame), vbox); |
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220 | |
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221 | fsel->priv->preview = gtk_image_new (); |
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222 | gtk_box_pack_start (GTK_BOX (vbox), fsel->priv->preview, FALSE, FALSE, 0); |
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223 | gtk_widget_show (fsel->priv->preview); |
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224 | |
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225 | fsel->priv->label = gtk_label_new (""); |
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226 | gtk_box_pack_start (GTK_BOX (vbox), fsel->priv->label, FALSE, FALSE, 0); |
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227 | gtk_widget_show (fsel->priv->label); |
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228 | |
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229 | g_signal_connect_data (G_OBJECT (gtk_tree_view_get_selection (GTK_TREE_VIEW (GTK_FILE_SELECTION (fsel)->file_list))), "changed", (GCallback) preview_file_selection_update, fsel, NULL, G_CONNECT_AFTER | G_CONNECT_SWAPPED); |
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230 | |
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231 | preview_file_selection_update (fsel, NULL); |
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232 | } |
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233 | |
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234 | static void |
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235 | preview_file_selection_set_property (GObject *object, guint arg_id, const GValue *value, GParamSpec *spec) |
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236 | { |
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237 | PreviewFileSelection *fsel = PREVIEW_FILE_SELECTION (object); |
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238 | |
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239 | switch (arg_id) |
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240 | { |
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241 | case PROP_DO_PREVIEW: |
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242 | if (g_value_get_boolean (value)) |
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243 | preview_file_selection_add_preview (fsel); |
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244 | break; |
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245 | } |
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246 | } |
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247 | |
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248 | static void preview_file_selection_get_property (GObject *object, guint arg_id, GValue *value, GParamSpec *spec) |
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249 | { |
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250 | PreviewFileSelection *fsel = PREVIEW_FILE_SELECTION (object); |
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251 | |
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252 | switch (arg_id) |
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253 | { |
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254 | case PROP_DO_PREVIEW: |
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255 | g_value_set_boolean (value, fsel->priv->preview != NULL); |
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256 | break; |
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257 | } |
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258 | } |
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259 | |
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260 | static void |
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261 | browse_dialog_ok (GtkWidget *button, GnomeFileEntry *entry) |
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262 | { |
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263 | gnome_file_entry_set_filename (entry, gtk_file_selection_get_filename (GTK_FILE_SELECTION (entry->fsw))); |
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264 | g_signal_emit_by_name (entry, "activate"); |
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265 | gtk_widget_destroy (entry->fsw); |
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266 | } |
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267 | |
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268 | static void |
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269 | browse_dialog_kill (GtkFileSelection *fsel, GnomeFileEntry *entry) |
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270 | { |
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271 | entry->fsw = NULL; |
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272 | } |
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273 | |
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274 | static void |
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275 | browse_clicked_cb (GnomeFileEntry *entry, const gchar *title) |
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276 | { |
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277 | GtkFileSelection *fs = GTK_FILE_SELECTION (preview_file_selection_new (title, TRUE)); |
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278 | |
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279 | entry->fsw = GTK_WIDGET (fs); |
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280 | |
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281 | g_signal_connect (fs->ok_button, "clicked", |
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282 | (GCallback) browse_dialog_ok, entry); |
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283 | |
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284 | g_signal_connect_swapped (fs->cancel_button, "clicked", |
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285 | (GCallback) gtk_widget_destroy, fs); |
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286 | |
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287 | g_signal_connect (fs, "destroy", |
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288 | (GCallback) browse_dialog_kill, entry); |
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289 | |
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290 | if (gtk_grab_get_current ()) |
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291 | gtk_grab_add (entry->fsw); |
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292 | } |
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293 | |
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294 | void |
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295 | preview_file_selection_hookup_file_entry (GnomeFileEntry *entry, const gchar *title) |
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296 | { |
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297 | g_return_if_fail (GNOME_IS_FILE_ENTRY (entry)); |
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298 | g_return_if_fail (title != NULL); |
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299 | |
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300 | g_signal_connect (G_OBJECT (entry), "browse_clicked", |
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301 | (GCallback) browse_clicked_cb, (gpointer) title); |
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302 | } |
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