Add GuiForm::Listener::changed which is called whenever a value is changed

1 files changed, 14 insertions, 2 deletions

diff --git a/src/gui_qt.cc b/src/gui_qt.cc
index 3e7c696..cad859e 100644
--- a/src/gui_qt.cc
+++ b/src/gui_qt.cc
@@ -1021,13 +1021,18 @@ protected:
                           static_cast<FileValue*>(value.get())->value_));
         break;
       }
+      auto vp = value.get();
+      edit->connect(edit, &QLineEdit::textChanged,
+                    [=](QString const& UNUSED(text)) {
+                      notify_changed(vp->id_);
+                    });
       layout->addWidget(label, row, 0);
       if (value->type_ == FILE) {
         auto button = new QPushButton("...");
         edit->setReadOnly(true);
         dialog_->connect(button, &QPushButton::clicked,
-                         [this,&value](bool UNUSED(checked)) {
-                           showFileDialog(static_cast<FileValue*>(value.get()));
+                         [=](bool UNUSED(checked)) {
+                           showFileDialog(static_cast<FileValue*>(vp));
                          });
         layout->addWidget(edit, row, 1);
         layout->addWidget(button, row, 2);
@@ -1088,6 +1093,13 @@ protected:
     return true;
   }
 
+  void notify_changed(std::string const& id) {
+    auto it = observers_.notify();
+    while (it.has_next()) {
+      it.next()->changed(this, id);
+    }
+  }
+
   virtual int add_extra_widgets(QGridLayout*, int row, int UNUSED(columns)) {
     return row;
   }