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PIKApp/libpikawidgets/pikapageselector.c

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Initial checkin of Pika from heckimp
2023-09-26 00:35:21 +02:00
#/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* pikapageselector.c
* Copyright (C) 2005 Michael Natterer <mitch@gimp.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "pikawidgetstypes.h"
#include "pikaicons.h"
#include "pikapageselector.h"
#include "pikapropwidgets.h"
#include "pikawidgets.h"
#include "libpika/libpika-intl.h"
/**
* SECTION: pikapageselector
* @title: PikaPageSelector
* @short_description: A widget to select pages from multi-page things.
*
* Use this for example for specifying what pages to import from
* a PDF or PS document.
**/
enum
{
SELECTION_CHANGED,
ACTIVATE,
LAST_SIGNAL
};
enum
{
PROP_0,
PROP_N_PAGES,
PROP_TARGET
};
enum
{
COLUMN_PAGE_NO,
COLUMN_THUMBNAIL,
COLUMN_LABEL,
COLUMN_LABEL_SET
};
struct _PikaPageSelectorPrivate
{
gint n_pages;
PikaPageSelectorTarget target;
GtkListStore *store;
GtkWidget *view;
GtkWidget *count_label;
GtkWidget *range_entry;
GdkPixbuf *default_thumbnail;
};
#define GET_PRIVATE(obj) (((PikaPageSelector *) (obj))->priv)
static void pika_page_selector_finalize (GObject *object);
static void pika_page_selector_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_page_selector_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_page_selector_selection_changed (GtkIconView *icon_view,
PikaPageSelector *selector);
static void pika_page_selector_item_activated (GtkIconView *icon_view,
GtkTreePath *path,
PikaPageSelector *selector);
static gboolean pika_page_selector_range_focus_out (GtkEntry *entry,
GdkEventFocus *fevent,
PikaPageSelector *selector);
static void pika_page_selector_range_activate (GtkEntry *entry,
PikaPageSelector *selector);
static gint pika_page_selector_int_compare (gconstpointer a,
gconstpointer b);
static void pika_page_selector_print_range (GString *string,
gint start,
gint end);
static GdkPixbuf * pika_page_selector_add_frame (GtkWidget *widget,
GdkPixbuf *pixbuf);
G_DEFINE_TYPE_WITH_PRIVATE (PikaPageSelector, pika_page_selector, GTK_TYPE_BOX)
#define parent_class pika_page_selector_parent_class
static guint selector_signals[LAST_SIGNAL] = { 0 };
static void
pika_page_selector_class_init (PikaPageSelectorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = pika_page_selector_finalize;
object_class->get_property = pika_page_selector_get_property;
object_class->set_property = pika_page_selector_set_property;
klass->selection_changed = NULL;
klass->activate = NULL;
/**
* PikaPageSelector::selection-changed:
* @widget: the object which received the signal.
*
* This signal is emitted whenever the set of selected pages changes.
*
* Since: 2.4
**/
selector_signals[SELECTION_CHANGED] =
g_signal_new ("selection-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (PikaPageSelectorClass, selection_changed),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
/**
* PikaPageSelector::activate:
* @widget: the object which received the signal.
*
* The "activate" signal on PikaPageSelector is an action signal. It
* is emitted when a user double-clicks an item in the page selection.
*
* Since: 2.4
*/
selector_signals[ACTIVATE] =
g_signal_new ("activate",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (PikaPageSelectorClass, activate),
NULL, NULL, NULL,
G_TYPE_NONE, 0);
widget_class->activate_signal = selector_signals[ACTIVATE];
/**
* PikaPageSelector:n-pages:
*
* The number of pages of the document to open.
*
* Since: 2.4
**/
g_object_class_install_property (object_class, PROP_N_PAGES,
g_param_spec_int ("n-pages",
_("N Pages"),
_("The number of pages to open"),
0, G_MAXINT, 0,
PIKA_PARAM_READWRITE));
/**
* PikaPageSelector:target:
*
* The target to open the document to.
*
* Since: 2.4
**/
g_object_class_install_property (object_class, PROP_TARGET,
g_param_spec_enum ("target",
_("Target"),
_("the target to open to"),
PIKA_TYPE_PAGE_SELECTOR_TARGET,
PIKA_PAGE_SELECTOR_TARGET_LAYERS,
PIKA_PARAM_READWRITE));
}
static void
pika_page_selector_init (PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv;
GtkWidget *vbox;
GtkWidget *sw;
GtkWidget *hbox;
GtkWidget *hbbox;
GtkWidget *button;
GtkWidget *label;
GtkWidget *combo;
GtkCellRenderer *renderer;
selector->priv = pika_page_selector_get_instance_private (selector);
priv = GET_PRIVATE (selector);
priv->n_pages = 0;
priv->target = PIKA_PAGE_SELECTOR_TARGET_LAYERS;
gtk_orientable_set_orientation (GTK_ORIENTABLE (selector),
GTK_ORIENTATION_VERTICAL);
gtk_box_set_spacing (GTK_BOX (selector), 12);
/* Pages */
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_box_pack_start (GTK_BOX (selector), vbox, TRUE, TRUE, 0);
gtk_widget_show (vbox);
sw = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (sw), GTK_SHADOW_IN);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_box_pack_start (GTK_BOX (vbox), sw, TRUE, TRUE, 0);
gtk_widget_show (sw);
priv->store = gtk_list_store_new (4,
G_TYPE_INT,
GDK_TYPE_PIXBUF,
G_TYPE_STRING,
G_TYPE_BOOLEAN);
priv->view = gtk_icon_view_new_with_model (GTK_TREE_MODEL (priv->store));
gtk_icon_view_set_selection_mode (GTK_ICON_VIEW (priv->view),
GTK_SELECTION_MULTIPLE);
gtk_container_add (GTK_CONTAINER (sw), priv->view);
gtk_widget_show (priv->view);
renderer = gtk_cell_renderer_pixbuf_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (priv->view), renderer, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (priv->view), renderer,
"pixbuf", COLUMN_THUMBNAIL,
NULL);
renderer = gtk_cell_renderer_text_new ();
gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (priv->view), renderer, FALSE);
gtk_cell_layout_set_attributes (GTK_CELL_LAYOUT (priv->view), renderer,
"text", COLUMN_LABEL,
NULL);
g_object_set (renderer,
"alignment", PANGO_ALIGN_CENTER,
"wrap-mode", PANGO_WRAP_WORD_CHAR,
"xalign", 0.5,
"yalign", 0.0,
NULL);
g_signal_connect (priv->view, "selection-changed",
G_CALLBACK (pika_page_selector_selection_changed),
selector);
g_signal_connect (priv->view, "item-activated",
G_CALLBACK (pika_page_selector_item_activated),
selector);
/* Count label */
priv->count_label = gtk_label_new (_("Nothing selected"));
gtk_label_set_xalign (GTK_LABEL (priv->count_label), 0.0);
pika_label_set_attributes (GTK_LABEL (priv->count_label),
PANGO_ATTR_STYLE, PANGO_STYLE_ITALIC,
-1);
gtk_box_pack_start (GTK_BOX (vbox), priv->count_label, FALSE, FALSE, 0);
gtk_widget_show (priv->count_label);
/* Select all button & range entry */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (selector), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
hbbox = gtk_button_box_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (hbox), hbbox, FALSE, FALSE, 0);
gtk_widget_show (hbbox);
button = gtk_button_new_with_mnemonic (_("Select _All"));
gtk_box_pack_start (GTK_BOX (hbbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
g_signal_connect_swapped (button, "clicked",
G_CALLBACK (pika_page_selector_select_all),
selector);
priv->range_entry = gtk_entry_new ();
gtk_widget_set_size_request (priv->range_entry, 80, -1);
gtk_box_pack_end (GTK_BOX (hbox), priv->range_entry, TRUE, TRUE, 0);
gtk_widget_show (priv->range_entry);
g_signal_connect (priv->range_entry, "focus-out-event",
G_CALLBACK (pika_page_selector_range_focus_out),
selector);
g_signal_connect (priv->range_entry, "activate",
G_CALLBACK (pika_page_selector_range_activate),
selector);
label = gtk_label_new_with_mnemonic (_("Select _range:"));
gtk_box_pack_end (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), priv->range_entry);
/* Target combo */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gtk_box_pack_start (GTK_BOX (selector), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
label = gtk_label_new_with_mnemonic (_("Open _pages as"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
combo = pika_prop_enum_combo_box_new (G_OBJECT (selector), "target", -1, -1);
gtk_box_pack_start (GTK_BOX (hbox), combo, FALSE, FALSE, 0);
gtk_widget_show (combo);
gtk_label_set_mnemonic_widget (GTK_LABEL (label), combo);
priv->default_thumbnail =
gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
"text-x-generic", 32, 0, NULL);
}
static void
pika_page_selector_finalize (GObject *object)
{
PikaPageSelectorPrivate *priv = GET_PRIVATE (object);
g_clear_object (&priv->default_thumbnail);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_page_selector_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaPageSelectorPrivate *priv = GET_PRIVATE (object);
switch (property_id)
{
case PROP_N_PAGES:
g_value_set_int (value, priv->n_pages);
break;
case PROP_TARGET:
g_value_set_enum (value, priv->target);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_page_selector_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaPageSelector *selector = PIKA_PAGE_SELECTOR (object);
PikaPageSelectorPrivate *priv = GET_PRIVATE (object);
switch (property_id)
{
case PROP_N_PAGES:
pika_page_selector_set_n_pages (selector, g_value_get_int (value));
break;
case PROP_TARGET:
priv->target = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
/* public functions */
/**
* pika_page_selector_new:
*
* Creates a new #PikaPageSelector widget.
*
* Returns: Pointer to the new #PikaPageSelector widget.
*
* Since: 2.4
**/
GtkWidget *
pika_page_selector_new (void)
{
return g_object_new (PIKA_TYPE_PAGE_SELECTOR, NULL);
}
/**
* pika_page_selector_set_n_pages:
* @selector: Pointer to a #PikaPageSelector.
* @n_pages: The number of pages.
*
* Sets the number of pages in the document to open.
*
* Since: 2.4
**/
void
pika_page_selector_set_n_pages (PikaPageSelector *selector,
gint n_pages)
{
PikaPageSelectorPrivate *priv;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
g_return_if_fail (n_pages >= 0);
priv = GET_PRIVATE (selector);
if (n_pages != priv->n_pages)
{
GtkTreeIter iter;
gint i;
if (n_pages < priv->n_pages)
{
for (i = n_pages; i < priv->n_pages; i++)
{
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, n_pages);
gtk_list_store_remove (priv->store, &iter);
}
}
else
{
for (i = priv->n_pages; i < n_pages; i++)
{
gchar *text;
text = g_strdup_printf (_("Page %d"), i + 1);
gtk_list_store_append (priv->store, &iter);
gtk_list_store_set (priv->store, &iter,
COLUMN_PAGE_NO, i,
COLUMN_THUMBNAIL, priv->default_thumbnail,
COLUMN_LABEL, text,
COLUMN_LABEL_SET, FALSE,
-1);
g_free (text);
}
}
priv->n_pages = n_pages;
g_object_notify (G_OBJECT (selector), "n-pages");
}
}
/**
* pika_page_selector_get_n_pages:
* @selector: Pointer to a #PikaPageSelector.
*
* Returns: the number of pages in the document to open.
*
* Since: 2.4
**/
gint
pika_page_selector_get_n_pages (PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), 0);
priv = GET_PRIVATE (selector);
return priv->n_pages;
}
/**
* pika_page_selector_set_target:
* @selector: Pointer to a #PikaPageSelector.
* @target: How to open the selected pages.
*
* Since: 2.4
**/
void
pika_page_selector_set_target (PikaPageSelector *selector,
PikaPageSelectorTarget target)
{
PikaPageSelectorPrivate *priv;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
g_return_if_fail (target <= PIKA_PAGE_SELECTOR_TARGET_IMAGES);
priv = GET_PRIVATE (selector);
if (target != priv->target)
{
priv->target = target;
g_object_notify (G_OBJECT (selector), "target");
}
}
/**
* pika_page_selector_get_target:
* @selector: Pointer to a #PikaPageSelector.
*
* Returns: How the selected pages should be opened.
*
* Since: 2.4
**/
PikaPageSelectorTarget
pika_page_selector_get_target (PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector),
PIKA_PAGE_SELECTOR_TARGET_LAYERS);
priv = GET_PRIVATE (selector);
return priv->target;
}
/**
* pika_page_selector_set_page_thumbnail:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to set the thumbnail for.
* @thumbnail: The thumbnail pixbuf.
*
* Sets the thumbnail for given @page_no. A default "page" icon will
* be used if no page thumbnail is set.
*
* Since: 2.4
**/
void
pika_page_selector_set_page_thumbnail (PikaPageSelector *selector,
gint page_no,
GdkPixbuf *thumbnail)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
g_return_if_fail (thumbnail == NULL || GDK_IS_PIXBUF (thumbnail));
priv = GET_PRIVATE (selector);
g_return_if_fail (page_no >= 0 && page_no < priv->n_pages);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
if (! thumbnail)
{
thumbnail = g_object_ref (priv->default_thumbnail);
}
else
{
thumbnail = pika_page_selector_add_frame (GTK_WIDGET (selector),
thumbnail);
}
gtk_list_store_set (priv->store, &iter,
COLUMN_THUMBNAIL, thumbnail,
-1);
g_clear_object (&thumbnail);
}
/**
* pika_page_selector_get_page_thumbnail:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to get the thumbnail for.
*
* Returns: (nullable) (transfer none): The page's thumbnail, or %NULL if none
* is set. The returned pixbuf is owned by #PikaPageSelector and must
* not be unref'ed when no longer needed.
*
* Since: 2.4
**/
GdkPixbuf *
pika_page_selector_get_page_thumbnail (PikaPageSelector *selector,
gint page_no)
{
PikaPageSelectorPrivate *priv;
GdkPixbuf *thumbnail;
GtkTreeIter iter;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), NULL);
priv = GET_PRIVATE (selector);
g_return_val_if_fail (page_no >= 0 && page_no < priv->n_pages, NULL);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
gtk_tree_model_get (GTK_TREE_MODEL (priv->store), &iter,
COLUMN_THUMBNAIL, &thumbnail,
-1);
if (thumbnail)
g_object_unref (thumbnail);
if (thumbnail == priv->default_thumbnail)
return NULL;
return thumbnail;
}
/**
* pika_page_selector_set_page_label:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to set the label for.
* @label: The label.
*
* Sets the label of the specified page.
*
* Since: 2.4
**/
void
pika_page_selector_set_page_label (PikaPageSelector *selector,
gint page_no,
const gchar *label)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
gchar *tmp;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
g_return_if_fail (page_no >= 0 && page_no < priv->n_pages);
if (! label)
tmp = g_strdup_printf (_("Page %d"), page_no + 1);
else
tmp = (gchar *) label;
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
gtk_list_store_set (priv->store, &iter,
COLUMN_LABEL, tmp,
COLUMN_LABEL_SET, label != NULL,
-1);
if (! label)
g_free (tmp);
}
/**
* pika_page_selector_get_page_label:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to get the thumbnail for.
*
* Returns: (nullable) (transfer full): The page's label, or %NULL if none is
* set. This is a newly allocated string that should be g_free()'d
* when no longer needed.
*
* Since: 2.4
**/
gchar *
pika_page_selector_get_page_label (PikaPageSelector *selector,
gint page_no)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
gchar *label;
gboolean label_set;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), NULL);
priv = GET_PRIVATE (selector);
g_return_val_if_fail (page_no >= 0 && page_no < priv->n_pages, NULL);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
gtk_tree_model_get (GTK_TREE_MODEL (priv->store), &iter,
COLUMN_LABEL, &label,
COLUMN_LABEL_SET, &label_set,
-1);
if (! label_set)
{
g_free (label);
label = NULL;
}
return label;
}
/**
* pika_page_selector_select_all:
* @selector: Pointer to a #PikaPageSelector.
*
* Selects all pages.
*
* Since: 2.4
**/
void
pika_page_selector_select_all (PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
gtk_icon_view_select_all (GTK_ICON_VIEW (priv->view));
}
/**
* pika_page_selector_unselect_all:
* @selector: Pointer to a #PikaPageSelector.
*
* Unselects all pages.
*
* Since: 2.4
**/
void
pika_page_selector_unselect_all (PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
gtk_icon_view_unselect_all (GTK_ICON_VIEW (priv->view));
}
/**
* pika_page_selector_select_page:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to select.
*
* Adds a page to the selection.
*
* Since: 2.4
**/
void
pika_page_selector_select_page (PikaPageSelector *selector,
gint page_no)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
GtkTreePath *path;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
g_return_if_fail (page_no >= 0 && page_no < priv->n_pages);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->store), &iter);
gtk_icon_view_select_path (GTK_ICON_VIEW (priv->view), path);
gtk_tree_path_free (path);
}
/**
* pika_page_selector_unselect_page:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to unselect.
*
* Removes a page from the selection.
*
* Since: 2.4
**/
void
pika_page_selector_unselect_page (PikaPageSelector *selector,
gint page_no)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
GtkTreePath *path;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
g_return_if_fail (page_no >= 0 && page_no < priv->n_pages);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->store), &iter);
gtk_icon_view_unselect_path (GTK_ICON_VIEW (priv->view), path);
gtk_tree_path_free (path);
}
/**
* pika_page_selector_page_is_selected:
* @selector: Pointer to a #PikaPageSelector.
* @page_no: The number of the page to check.
*
* Returns: %TRUE if the page is selected, %FALSE otherwise.
*
* Since: 2.4
**/
gboolean
pika_page_selector_page_is_selected (PikaPageSelector *selector,
gint page_no)
{
PikaPageSelectorPrivate *priv;
GtkTreeIter iter;
GtkTreePath *path;
gboolean selected;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), FALSE);
priv = GET_PRIVATE (selector);
g_return_val_if_fail (page_no >= 0 && page_no < priv->n_pages, FALSE);
gtk_tree_model_iter_nth_child (GTK_TREE_MODEL (priv->store),
&iter, NULL, page_no);
path = gtk_tree_model_get_path (GTK_TREE_MODEL (priv->store), &iter);
selected = gtk_icon_view_path_is_selected (GTK_ICON_VIEW (priv->view),
path);
gtk_tree_path_free (path);
return selected;
}
/**
* pika_page_selector_get_selected_pages:
* @selector: Pointer to a #PikaPageSelector.
* @n_selected_pages: (out): Returns the number of selected pages.
*
* Returns: (array length=n_selected_pages): A sorted array of page numbers of
* selected pages. Use g_free() if you don't need the array any longer
*
* Since: 2.4
**/
gint *
pika_page_selector_get_selected_pages (PikaPageSelector *selector,
gint *n_selected_pages)
{
PikaPageSelectorPrivate *priv;
GList *selected;
GList *list;
gint *array;
gint i;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), NULL);
g_return_val_if_fail (n_selected_pages != NULL, NULL);
priv = GET_PRIVATE (selector);
selected = gtk_icon_view_get_selected_items (GTK_ICON_VIEW (priv->view));
*n_selected_pages = g_list_length (selected);
array = g_new0 (gint, *n_selected_pages);
for (list = selected, i = 0; list; list = g_list_next (list), i++)
{
gint *indices = gtk_tree_path_get_indices (list->data);
array[i] = indices[0];
}
qsort (array, *n_selected_pages, sizeof (gint),
pika_page_selector_int_compare);
g_list_free_full (selected, (GDestroyNotify) gtk_tree_path_free);
return array;
}
/**
* pika_page_selector_select_range:
* @selector: Pointer to a #PikaPageSelector.
* @range: A string representing the set of selected pages.
*
* Selects the pages described by @range. The range string is a
* user-editable list of pages and ranges, e.g. "1,3,5-7,9-12,14".
* Note that the page numbering in the range string starts with 1,
* not 0.
*
* Invalid pages and ranges will be silently ignored, duplicate and
* overlapping pages and ranges will be merged.
*
* Since: 2.4
**/
void
pika_page_selector_select_range (PikaPageSelector *selector,
const gchar *range)
{
PikaPageSelectorPrivate *priv;
gchar **ranges;
g_return_if_fail (PIKA_IS_PAGE_SELECTOR (selector));
priv = GET_PRIVATE (selector);
if (! range)
range = "";
g_signal_handlers_block_by_func (priv->view,
pika_page_selector_selection_changed,
selector);
pika_page_selector_unselect_all (selector);
ranges = g_strsplit (range, ",", -1);
if (ranges)
{
gint i;
for (i = 0; ranges[i] != NULL; i++)
{
gchar *range = g_strstrip (ranges[i]);
gchar *dash;
dash = strchr (range, '-');
if (dash)
{
gchar *from;
gchar *to;
gint page_from = -1;
gint page_to = -1;
*dash = '\0';
from = g_strstrip (range);
to = g_strstrip (dash + 1);
if (sscanf (from, "%i", &page_from) != 1 && strlen (from) == 0)
page_from = 1;
if (sscanf (to, "%i", &page_to) != 1 && strlen (to) == 0)
page_to = priv->n_pages;
if (page_from > 0 &&
page_to > 0 &&
page_from <= page_to &&
page_from <= priv->n_pages)
{
gint page_no;
page_from = MAX (page_from, 1) - 1;
page_to = MIN (page_to, priv->n_pages) - 1;
for (page_no = page_from; page_no <= page_to; page_no++)
pika_page_selector_select_page (selector, page_no);
}
}
else
{
gint page_no;
if (sscanf (range, "%i", &page_no) == 1 &&
page_no >= 1 &&
page_no <= priv->n_pages)
{
pika_page_selector_select_page (selector, page_no - 1);
}
}
}
g_strfreev (ranges);
}
g_signal_handlers_unblock_by_func (priv->view,
pika_page_selector_selection_changed,
selector);
pika_page_selector_selection_changed (GTK_ICON_VIEW (priv->view), selector);
}
/**
* pika_page_selector_get_selected_range:
* @selector: Pointer to a #PikaPageSelector.
*
* Returns: A newly allocated string representing the set of selected
* pages. See pika_page_selector_select_range() for the
* format of the string.
*
* Since: 2.4
**/
gchar *
pika_page_selector_get_selected_range (PikaPageSelector *selector)
{
gint *pages;
gint n_pages;
GString *string;
g_return_val_if_fail (PIKA_IS_PAGE_SELECTOR (selector), NULL);
string = g_string_new ("");
pages = pika_page_selector_get_selected_pages (selector, &n_pages);
if (pages)
{
gint range_start, range_end;
gint last_printed;
gint i;
range_start = pages[0];
range_end = pages[0];
last_printed = -1;
for (i = 1; i < n_pages; i++)
{
if (pages[i] > range_end + 1)
{
pika_page_selector_print_range (string,
range_start, range_end);
last_printed = range_end;
range_start = pages[i];
}
range_end = pages[i];
}
if (range_end != last_printed)
pika_page_selector_print_range (string, range_start, range_end);
g_free (pages);
}
return g_string_free (string, FALSE);
}
/* private functions */
static void
pika_page_selector_selection_changed (GtkIconView *icon_view,
PikaPageSelector *selector)
{
PikaPageSelectorPrivate *priv = GET_PRIVATE (selector);
GList *selected;
gint n_selected;
gchar *range;
selected = gtk_icon_view_get_selected_items (GTK_ICON_VIEW (priv->view));
n_selected = g_list_length (selected);
g_list_free_full (selected, (GDestroyNotify) gtk_tree_path_free);
if (n_selected == 0)
{
gtk_label_set_text (GTK_LABEL (priv->count_label),
_("Nothing selected"));
}
else if (n_selected == 1)
{
gtk_label_set_text (GTK_LABEL (priv->count_label),
_("One page selected"));
}
else
{
gchar *text;
if (n_selected == priv->n_pages)
text = g_strdup_printf (ngettext ("%d page selected",
"All %d pages selected", n_selected),
n_selected);
else
text = g_strdup_printf (ngettext ("%d page selected",
"%d pages selected",
n_selected),
n_selected);
gtk_label_set_text (GTK_LABEL (priv->count_label), text);
g_free (text);
}
range = pika_page_selector_get_selected_range (selector);
gtk_entry_set_text (GTK_ENTRY (priv->range_entry), range);
g_free (range);
gtk_editable_set_position (GTK_EDITABLE (priv->range_entry), -1);
g_signal_emit (selector, selector_signals[SELECTION_CHANGED], 0);
}
static void
pika_page_selector_item_activated (GtkIconView *icon_view,
GtkTreePath *path,
PikaPageSelector *selector)
{
g_signal_emit (selector, selector_signals[ACTIVATE], 0);
}
static gboolean
pika_page_selector_range_focus_out (GtkEntry *entry,
GdkEventFocus *fevent,
PikaPageSelector *selector)
{
pika_page_selector_range_activate (entry, selector);
return FALSE;
}
static void
pika_page_selector_range_activate (GtkEntry *entry,
PikaPageSelector *selector)
{
pika_page_selector_select_range (selector, gtk_entry_get_text (entry));
}
static gint
pika_page_selector_int_compare (gconstpointer a,
gconstpointer b)
{
return *(gint*)a - *(gint*)b;
}
static void
pika_page_selector_print_range (GString *string,
gint start,
gint end)
{
if (string->len != 0)
g_string_append_c (string, ',');
if (start == end)
g_string_append_printf (string, "%d", start + 1);
else
g_string_append_printf (string, "%d-%d", start + 1, end + 1);
}
static void
draw_frame_row (GdkPixbuf *frame_image,
gint target_width,
gint source_width,
gint source_v_position,
gint dest_v_position,
GdkPixbuf *result_pixbuf,
gint left_offset,
gint height)
{
gint remaining_width = target_width;
gint h_offset = 0;
while (remaining_width > 0)
{
gint slab_width = (remaining_width > source_width ?
source_width : remaining_width);
gdk_pixbuf_copy_area (frame_image,
left_offset, source_v_position,
slab_width, height,
result_pixbuf,
left_offset + h_offset, dest_v_position);
remaining_width -= slab_width;
h_offset += slab_width;
}
}
/* utility to draw the middle section of the frame in a loop */
static void
draw_frame_column (GdkPixbuf *frame_image,
gint target_height,
gint source_height,
gint source_h_position,
gint dest_h_position,
GdkPixbuf *result_pixbuf,
gint top_offset, int width)
{
gint remaining_height = target_height;
gint v_offset = 0;
while (remaining_height > 0)
{
gint slab_height = (remaining_height > source_height ?
source_height : remaining_height);
gdk_pixbuf_copy_area (frame_image,
source_h_position, top_offset,
width, slab_height,
result_pixbuf,
dest_h_position, top_offset + v_offset);
remaining_height -= slab_height;
v_offset += slab_height;
}
}
static GdkPixbuf *
stretch_frame_image (GdkPixbuf *frame_image,
gint left_offset,
gint top_offset,
gint right_offset,
gint bottom_offset,
gint dest_width,
gint dest_height)
{
GdkPixbuf *pixbuf;
gint frame_width, frame_height;
gint target_width, target_frame_width;
gint target_height, target_frame_height;
frame_width = gdk_pixbuf_get_width (frame_image);
frame_height = gdk_pixbuf_get_height (frame_image );
pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8,
dest_width, dest_height);
gdk_pixbuf_fill (pixbuf, 0);
target_width = dest_width - left_offset - right_offset;
target_height = dest_height - top_offset - bottom_offset;
target_frame_width = frame_width - left_offset - right_offset;
target_frame_height = frame_height - top_offset - bottom_offset;
left_offset += MIN (target_width / 4, target_frame_width / 4);
right_offset += MIN (target_width / 4, target_frame_width / 4);
top_offset += MIN (target_height / 4, target_frame_height / 4);
bottom_offset += MIN (target_height / 4, target_frame_height / 4);
target_width = dest_width - left_offset - right_offset;
target_height = dest_height - top_offset - bottom_offset;
target_frame_width = frame_width - left_offset - right_offset;
target_frame_height = frame_height - top_offset - bottom_offset;
/* draw the left top corner and top row */
gdk_pixbuf_copy_area (frame_image,
0, 0, left_offset, top_offset,
pixbuf, 0, 0);
draw_frame_row (frame_image, target_width, target_frame_width,
0, 0,
pixbuf,
left_offset, top_offset);
/* draw the right top corner and left column */
gdk_pixbuf_copy_area (frame_image,
frame_width - right_offset, 0,
right_offset, top_offset,
pixbuf,
dest_width - right_offset, 0);
draw_frame_column (frame_image, target_height, target_frame_height, 0, 0,
pixbuf, top_offset, left_offset);
/* draw the bottom right corner and bottom row */
gdk_pixbuf_copy_area (frame_image,
frame_width - right_offset, frame_height - bottom_offset,
right_offset, bottom_offset,
pixbuf,
dest_width - right_offset, dest_height - bottom_offset);
draw_frame_row (frame_image, target_width, target_frame_width,
frame_height - bottom_offset, dest_height - bottom_offset,
pixbuf, left_offset, bottom_offset);
/* draw the bottom left corner and the right column */
gdk_pixbuf_copy_area (frame_image,
0, frame_height - bottom_offset,
left_offset, bottom_offset,
pixbuf,
0, dest_height - bottom_offset);
draw_frame_column (frame_image, target_height, target_frame_height,
frame_width - right_offset, dest_width - right_offset,
pixbuf, top_offset, right_offset);
return pixbuf;
}
#define FRAME_LEFT 2
#define FRAME_TOP 2
#define FRAME_RIGHT 4
#define FRAME_BOTTOM 4
static GdkPixbuf *
pika_page_selector_add_frame (GtkWidget *widget,
GdkPixbuf *pixbuf)
{
GdkPixbuf *frame;
gint width, height;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
frame = g_object_get_data (G_OBJECT (widget), "frame");
if (! frame)
{
GError *error = NULL;
frame = gtk_icon_theme_load_icon (gtk_icon_theme_get_default (),
PIKA_ICON_FRAME, 64, 0, &error);
if (error)
{
g_printerr ("%s: %s\n", G_STRFUNC, error->message);
g_error_free (error);
}
g_return_val_if_fail (frame, NULL);
g_object_set_data_full (G_OBJECT (widget), "frame", frame,
(GDestroyNotify) g_object_unref);
}
frame = stretch_frame_image (frame,
FRAME_LEFT,
FRAME_TOP,
FRAME_RIGHT,
FRAME_BOTTOM,
width + FRAME_LEFT + FRAME_RIGHT,
height + FRAME_TOP + FRAME_BOTTOM);
gdk_pixbuf_copy_area (pixbuf, 0, 0, width, height,
frame, FRAME_LEFT, FRAME_TOP);
return frame;
}