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-rw-r--r--src/widgets/spw-utilities.cpp216
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diff --git a/src/widgets/spw-utilities.cpp b/src/widgets/spw-utilities.cpp
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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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