Add new widgets "hbox" and "vbox" for layouting purposes

1 files changed, 108 insertions, 0 deletions

diff --git a/src/extension/prefdialog/widget-box.cpp b/src/extension/prefdialog/widget-box.cpp
new file mode 100644
index 000000000..d7b93e3ff
--- /dev/null
+++ b/src/extension/prefdialog/widget-box.cpp
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Box widget for extensions
+ *//*
+ * Authors:
+ *   Patrick Storz <eduard.braun2@gmx.de>
+ *
+ * Copyright (C) 2019 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include "widget-box.h"
+
+#include <gtkmm/box.h>
+
+#include "xml/node.h"
+#include "extension/extension.h"
+
+namespace Inkscape {
+namespace Extension {
+
+
+WidgetBox::WidgetBox(Inkscape::XML::Node *xml, Inkscape::Extension::Extension *ext)
+    : InxWidget(xml, ext)
+{
+    // Decide orientation based on tagname (hbox vs. vbox)
+    const char *tagname = xml->name();
+    if (!strncmp(tagname, INKSCAPE_EXTENSION_NS_NC, strlen(INKSCAPE_EXTENSION_NS_NC))) {
+        tagname += strlen(INKSCAPE_EXTENSION_NS);
+    }
+    if (!strcmp(tagname, "hbox")) {
+        _orientation = HORIZONTAL;
+    } else if (!strcmp(tagname, "vbox")) {
+        _orientation = VERTICAL;
+    } else {
+        g_assert_not_reached();
+    }
+
+    // Read XML tree of box and parse child widgets
+    if (xml) {
+        Inkscape::XML::Node *child_repr = xml->firstChild();
+        while (child_repr) {
+            const char *chname = child_repr->name();
+            if (!strncmp(chname, INKSCAPE_EXTENSION_NS_NC, strlen(INKSCAPE_EXTENSION_NS_NC))) {
+                chname += strlen(INKSCAPE_EXTENSION_NS);
+            }
+            if (chname[0] == '_') { // allow leading underscore in tag names for backwards-compatibility
+                chname++;
+            }
+
+            if (InxWidget::is_valid_widget_name(chname)) {
+                InxWidget *widget = InxWidget::make(child_repr, _extension);
+                if (widget) {
+                    _children.push_back(widget);
+                }
+            } else if (child_repr->type() == XML::ELEMENT_NODE) {
+                g_warning("Invalid child element ('%s') in box widget in extension '%s'.",
+                          chname, _extension->get_id());
+            } else if (child_repr->type() != XML::COMMENT_NODE){
+                g_warning("Invalid child element found in box widget in extension '%s'.", _extension->get_id());
+            }
+
+            child_repr = child_repr->next();
+        }
+    }
+}
+
+Gtk::Widget *WidgetBox::get_widget(sigc::signal<void> *changeSignal)
+{
+    if (_hidden) {
+        return nullptr;
+    }
+
+    Gtk::Orientation orientation;
+    if (_orientation == HORIZONTAL) {
+        orientation = Gtk::ORIENTATION_HORIZONTAL;
+    } else {
+        orientation = Gtk::ORIENTATION_VERTICAL;
+    }
+
+    Gtk::Box *box = Gtk::manage(new Gtk::Box(orientation));
+    // box->set_border_width(GUI_BOX_MARGIN); // leave at zero for now, so box is purely for layouting (not grouping)
+                                              // revisit this later, possibly implementing GtkFrame or similar
+    box->set_spacing(GUI_BOX_SPACING);
+
+    // add child widgets onto page (if any)
+    for (auto child : _children) {
+        Gtk::Widget *child_widget = child->get_widget(changeSignal);
+        if (child_widget) {
+            int indent = child->get_indent();
+            child_widget->set_margin_start(indent * GUI_INDENTATION);
+            box->pack_start(*child_widget, false, false, 0);
+
+            const char *tooltip = child->get_tooltip();
+            if (tooltip) {
+                child_widget->set_tooltip_text(tooltip);
+            }
+        }
+    }
+
+    box->show();
+
+    return dynamic_cast<Gtk::Widget *>(box);
+}
+
+}  /* namespace Extension */
+}  /* namespace Inkscape */