mainwindow: connect button to actions

Connect:

- add plugin dialog
- open file dialog
- about dialog

src/gps.ui

@@ -2,6 +2,122 @@
 <!-- Generated with glade 3.38.2 -->
 <interface>
   <requires lib="gtk+" version="3.24"/>
+  <object class="GtkAboutDialog" id="dialog-about">
+    <property name="can-focus">False</property>
+    <property name="type-hint">dialog</property>
+    <property name="program-name">GstPipelineStudio</property>
+    <property name="authors">Stéphane Cerveau</property>
+    <property name="logo-icon-name">image-missing</property>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can-focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can-focus">False</property>
+            <property name="layout-style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkDialog" id="dialog-add-plugin">
+    <property name="can-focus">False</property>
+    <property name="default-width">320</property>
+    <property name="default-height">260</property>
+    <property name="type-hint">dialog</property>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can-focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can-focus">False</property>
+            <property name="layout-style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkScrolledWindow">
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="shadow-type">in</property>
+            <child>
+              <object class="GtkTreeView">
+                <property name="visible">True</property>
+                <property name="can-focus">True</property>
+                <child internal-child="selection">
+                  <object class="GtkTreeSelection"/>
+                </child>
+              </object>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+  <object class="GtkFileChooserDialog" id="dialog-open-file">
+    <property name="can-focus">False</property>
+    <property name="type-hint">dialog</property>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="can-focus">False</property>
+        <property name="orientation">vertical</property>
+        <property name="spacing">2</property>
+        <child internal-child="action_area">
+          <object class="GtkButtonBox">
+            <property name="can-focus">False</property>
+            <property name="layout-style">end</property>
+            <child>
+              <placeholder/>
+            </child>
+            <child>
+              <placeholder/>
+            </child>
+          </object>
+          <packing>
+            <property name="expand">False</property>
+            <property name="fill">False</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <placeholder/>
+        </child>
+      </object>
+    </child>
+  </object>
   <object class="GtkApplicationWindow" id="mainwindow">
     <property name="can-focus">False</property>
     <property name="border-width">6</property>
@@ -219,7 +335,7 @@
                 <property name="can-focus">False</property>
                 <property name="layout-style">start</property>
                 <child>
-                  <object class="GtkButton" id="button-add">
+                  <object class="GtkButton" id="button-add-plugin">
                     <property name="label">gtk-add</property>
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
@@ -234,7 +350,7 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkButton" id="button-open">
+                  <object class="GtkButton" id="button-open-file">
                     <property name="label">gtk-open</property>
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
@@ -269,13 +385,13 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkButton">
+                  <object class="GtkButton" id="button-pause">
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
                     <property name="receives-default">True</property>
                     <property name="always-show-image">True</property>
                     <child>
-                      <object class="GtkImage" id="button-pause">
+                      <object class="GtkImage">
                         <property name="visible">True</property>
                         <property name="can-focus">False</property>
                         <property name="stock">gtk-media-pause</property>
@@ -289,13 +405,13 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkButton">
+                  <object class="GtkButton" id="button-stop">
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
                     <property name="receives-default">True</property>
                     <property name="always-show-image">True</property>
                     <child>
-                      <object class="GtkImage" id="button-stop">
+                      <object class="GtkImage">
                         <property name="visible">True</property>
                         <property name="can-focus">False</property>
                         <property name="stock">gtk-media-stop</property>
@@ -309,12 +425,12 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkButton">
+                  <object class="GtkButton" id="button-clear">
                     <property name="visible">True</property>
                     <property name="can-focus">True</property>
                     <property name="receives-default">True</property>
                     <child>
-                      <object class="GtkImage" id="button-clear">
+                      <object class="GtkImage">
                         <property name="visible">True</property>
                         <property name="can-focus">False</property>
                         <property name="stock">gtk-clear</property>
@@ -358,6 +474,7 @@
             <property name="visible">True</property>
             <property name="can-focus">False</property>
             <property name="vexpand">True</property>
+            <property name="homogeneous">True</property>
             <child>
               <object class="GtkScrolledWindow">
                 <property name="visible">True</property>

src/mainwindow.rs

@@ -2,8 +2,8 @@ use gtk::cairo::Context;
 use gtk::glib;
 use gtk::prelude::*;
 use gtk::{
-    AboutDialog, AccelFlags, AccelGroup, ApplicationWindow, Builder, DrawingArea, EventBox,
-    MenuItem, Viewport, WindowPosition,
+    AboutDialog, AccelFlags, AccelGroup, ApplicationWindow, Builder, Button, Dialog, DrawingArea,
+    EventBox, FileChooserDialog, MenuItem, ResponseType, Viewport, WindowPosition,
 };
 use std::cell::RefCell;
 use std::rc::Rc;
@@ -59,6 +59,46 @@ pub fn build_ui(application: &gtk::Application) {
 
     let quit: MenuItem = builder.object("menu-quit").expect("Couldn't get window");
     let about: MenuItem = builder.object("menu-about").expect("Couldn't get window");
+    let about_dialog: AboutDialog = builder.object("dialog-about").expect("Couldn't get window");
+    about.connect_activate(move |_| {
+        about_dialog.show();
+    });
+    // Create a dialog to select GStreamer elements.
+    let add_button: Button = builder
+        .object("button-add-plugin")
+        .expect("Couldn't get app_button");
+    let add_dialog: Dialog = builder
+        .object("dialog-add-plugin")
+        .expect("Couldn't get window");
+    add_button.connect_clicked(glib::clone!(@weak window => move |_| {
+        // entry.set_text("Clicked!");
+        add_dialog.connect_response(|dialog, _| dialog.close());
+        add_dialog.show_all();
+    }));
+    // Create a dialog to open a file
+    let open_button: Button = builder
+        .object("button-open-file")
+        .expect("Couldn't get app_button");
+    let open_dialog: FileChooserDialog = builder
+        .object("dialog-open-file")
+        .expect("Couldn't get window");
+    open_button.connect_clicked(glib::clone!(@weak window => move |_| {
+        // entry.set_text("Clicked!");
+        open_dialog.connect_response(|dialog, _| dialog.close());
+        open_dialog.add_buttons(&[
+            ("Open", ResponseType::Ok),
+            ("Cancel", ResponseType::Cancel)
+        ]);
+        open_dialog.set_select_multiple(true);
+        open_dialog.connect_response(|open_dialog, response| {
+            if response == ResponseType::Ok {
+                let files = open_dialog.filenames();
+                println!("Files: {:?}", files);
+            }
+            open_dialog.close();
+        });
+        open_dialog.show_all();
+    }));
 
     let accel_group = AccelGroup::new();
     window.add_accel_group(&accel_group);
@@ -72,15 +112,4 @@ pub fn build_ui(application: &gtk::Application) {
     // different values on different platforms.
     let (key, modifier) = gtk::accelerator_parse("<Primary>Q");
     quit.add_accelerator("activate", &accel_group, key, modifier, AccelFlags::VISIBLE);
-
-    about.connect_activate(move |_| {
-        let p = AboutDialog::new();
-        p.set_authors(&["gtk-rs developers"]);
-        p.set_website_label(Some("gtk-rs"));
-        p.set_website(Some("http://gtk-rs.org"));
-        p.set_authors(&["gtk-rs developers"]);
-        p.set_title("About!");
-        p.set_transient_for(Some(&window));
-        p.show_all();
-    });
 }