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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Inkscape Widget Utilities
*
* Authors:
* Bryce W. Harrington <brycehar@bryceharrington.org>
* bulia byak <buliabyak@users.sf.net>
*
* Copyright (C) 2003 Bryce W. Harrington
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <cstring>
#include <string>
#include <gtkmm/box.h>
#include <gtkmm/label.h>
#include <gtkmm/grid.h>
#include "selection.h"
#include "spw-utilities.h"
/**
* Creates a label widget with the given text, at the given col, row
* position in the table.
*/
Gtk::Label * spw_label(Gtk::Grid *table, const gchar *label_text, int col, int row, Gtk::Widget* target)
{
Gtk::Label *label_widget = new Gtk::Label();
g_assert(label_widget != nullptr);
if (target != nullptr) {
label_widget->set_text_with_mnemonic(label_text);
label_widget->set_mnemonic_widget(*target);
} else {
label_widget->set_text(label_text);
}
label_widget->show();
label_widget->set_halign(Gtk::ALIGN_START);
label_widget->set_valign(Gtk::ALIGN_CENTER);
label_widget->set_margin_start(4);
label_widget->set_margin_end(4);
table->attach(*label_widget, col, row, 1, 1);
return label_widget;
}
/**
* Creates a horizontal layout manager with 4-pixel spacing between children
* and space for 'width' columns.
*/
Gtk::Box * spw_hbox(Gtk::Grid * table, int width, int col, int row)
{
/* Create a new hbox with a 4-pixel spacing between children */
Gtk::Box *hb = Gtk::manage(new Gtk::Box(Gtk::ORIENTATION_HORIZONTAL, 4));
g_assert(hb != nullptr);
hb->show();
hb->set_hexpand();
hb->set_halign(Gtk::ALIGN_FILL);
hb->set_valign(Gtk::ALIGN_CENTER);
table->attach(*hb, col, row, width, 1);
return hb;
}
/**
* Finds the descendant of w which has the data with the given key and returns the data, or NULL if there's none.
*/
gpointer sp_search_by_data_recursive(GtkWidget *w, gpointer key)
{
gpointer r = nullptr;
if (w && G_IS_OBJECT(w)) {
r = g_object_get_data(G_OBJECT(w), (gchar *) key);
}
if (r) return r;
if (GTK_IS_CONTAINER(w)) {
std::vector<Gtk::Widget*> children = Glib::wrap(GTK_CONTAINER(w))->get_children();
for (auto i:children) {
r = sp_search_by_data_recursive(GTK_WIDGET(i->gobj()), key);
if (r) return r;
}
}
return nullptr;
}
/**
* Returns a named descendent of parent, which has the given name, or nullptr if there's none.
*
* \param[in] parent The widget to search
* \param[in] name The name of the desired child widget
*
* \return The specified child widget, or nullptr if it cannot be found
*/
Gtk::Widget *
sp_search_by_name_recursive(Gtk::Widget *parent, const Glib::ustring& name)
{
auto parent_bin = dynamic_cast<Gtk::Bin *>(parent);
auto parent_container = dynamic_cast<Gtk::Container *>(parent);
if (parent && parent->get_name() == name) {
return parent;
}
else if (parent_bin) {
auto child = parent_bin->get_child();
return sp_search_by_name_recursive(child, name);
}
else if (parent_container) {
auto children = parent_container->get_children();
for (auto child : children) {
auto tmp = sp_search_by_name_recursive(child, name);
if (tmp) {
return tmp;
}
}
}
return nullptr;
}
/**
* Returns the descendant of w which has the given key and value pair, or NULL if there's none.
*/
GtkWidget *sp_search_by_value_recursive(GtkWidget *w, gchar *key, gchar *value)
{
gchar *r = nullptr;
if (w && G_IS_OBJECT(w)) {
r = (gchar *) g_object_get_data(G_OBJECT(w), key);
}
if (r && !strcmp (r, value)) return w;
if (GTK_IS_CONTAINER(w)) {
std::vector<Gtk::Widget*> children = Glib::wrap(GTK_CONTAINER(w))->get_children();
for (auto i:children) {
GtkWidget *child = sp_search_by_value_recursive(GTK_WIDGET(i->gobj()), key, value);
if (child) return child;
}
}
return nullptr;
}
/**
* This function traverses a tree of widgets descending into bins and containers.
* It stops and returns a pointer to the first child widget for which 'eval' evaluates to true.
* If 'eval' never returns true then this function visits all widgets and returns nullptr.
*
* \param[in] widget The widget to start traversal from - top of the tree
* \param[in] eval The callback invoked for each visited widget
*
* \return The widget for which 'eval' returned true, or nullptr otherwise.
* Note: it could be a starting widget too.
*/
Gtk::Widget* sp_traverse_widget_tree(Gtk::Widget* widget, const std::function<bool (Gtk::Widget*)>& eval) {
if (!widget) return nullptr;
if (eval(widget)) return widget;
if (auto bin = dynamic_cast<Gtk::Bin*>(widget)) {
return sp_traverse_widget_tree(bin->get_child(), eval);
}
else if (auto container = dynamic_cast<Gtk::Container*>(widget)) {
auto children = container->get_children();
for (auto child : children) {
if (auto found = sp_traverse_widget_tree(child, eval)) {
return found;
}
}
}
return nullptr;
}
/**
* This function traverses a tree of widgets searching for first focusable widget.
*
* \param[in] widget The widget to start traversal from - top of the tree
*
* \return The first focusable widget or nullptr if none are focusable.
*/
Gtk::Widget* sp_find_focusable_widget(Gtk::Widget* widget) {
return sp_traverse_widget_tree(widget, [](Gtk::Widget* w) { return w->get_can_focus(); });
}
Glib::ustring sp_get_action_target(Gtk::Widget* widget) {
Glib::ustring target;
if (widget && GTK_IS_ACTIONABLE(widget->gobj())) {
auto variant = gtk_actionable_get_action_target_value(GTK_ACTIONABLE(widget->gobj()));
auto type = variant ? g_variant_get_type_string(variant) : nullptr;
if (type && strcmp(type, "s") == 0) {
target = g_variant_get_string(variant, nullptr);
}
}
return target;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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