Add new widget "spacer" which adds an empty space between widgets

The attribute "size" allows to define the spacing in px.

The special value "expand" can be used to make the spacer consume
all available space in the parent.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/extension/prefdialog/widget.cpp b/src/extension/prefdialog/widget.cpp
index eb9d23e07..da4b6545d 100644
--- a/src/extension/prefdialog/widget.cpp
+++ b/src/extension/prefdialog/widget.cpp
@@ -15,6 +15,7 @@
 #include "widget-box.h"
 #include "widget-label.h"
 #include "widget-separator.h"
+#include "widget-spacer.h"
 
 #include <algorithm>
 
@@ -51,6 +52,8 @@ InxWidget *InxWidget::make(Inkscape::XML::Node *in_repr, Inkscape::Extension::Ex
         widget = new WidgetLabel(in_repr, in_ext);
     } else if (!strcmp(name, "separator")) {
         widget = new WidgetSeparator(in_repr, in_ext);
+    } else if (!strcmp(name, "spacer")) {
+        widget = new WidgetSpacer(in_repr, in_ext);
     } else if (!strcmp(name, "param")) {
         widget = InxParameter::make(in_repr, in_ext);
     } else {
@@ -64,7 +67,7 @@ InxWidget *InxWidget::make(Inkscape::XML::Node *in_repr, Inkscape::Extension::Ex
 bool InxWidget::is_valid_widget_name(const char *name)
 {
     // keep in sync with names supported in InxWidget::make() above
-    static const std::vector<std::string> valid_names = {"hbox", "vbox", "label", "separator", "param"};
+    static const std::vector<std::string> valid_names = {"hbox", "vbox", "label", "separator", "spacer", "param"};
 
     if (std::find(valid_names.begin(), valid_names.end(), name) != valid_names.end()) {
         return true;