ScreenCast/Dialog: add icon, explanation text

data/gresource.xml

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <gresources>
   <gresource prefix="/io/elementary/xdg-desktop-portal-pantheon">
+    <file alias="48x48/apps/accessories-screencast-tool.svg" compressed="true" preprocess="xml-stripblanks">icons/screencast.svg</file>
+    <file alias="48x48@2/apps/accessories-screencast-tool.svg" compressed="true" preprocess="xml-stripblanks">icons/screencast.svg</file>
+
     <file alias="scalable/actions/grab-area-symbolic.svg" compressed="true" preprocess="xml-stripblanks">icons/grab-area-symbolic.svg</file>
     <file alias="scalable/actions/grab-screen-symbolic.svg" compressed="true" preprocess="xml-stripblanks">icons/grab-screen-symbolic.svg</file>
     <file alias="scalable/actions/grab-window-symbolic.svg" compressed="true" preprocess="xml-stripblanks">icons/grab-window-symbolic.svg</file>

src/ScreenCast/Dialog.vala

@@ -5,7 +5,7 @@
  * Authored by: Leonhard Kargl <leo.kargl@proton.me>
  */
 
-public class ScreenCast.Dialog : Granite.Dialog {
+public class ScreenCast.Dialog : Granite.MessageDialog {
     public SourceType source_types { get; construct; }
     public bool allow_multiple { get; construct; }
 
@@ -27,6 +27,7 @@ public class ScreenCast.Dialog : Granite.Dialog {
         monitor_rows = new List<SelectionRow> ();
 
         list_box = new Gtk.ListBox () {
+            hexpand = true,
             vexpand = true
         };
         list_box.add_css_class (Granite.STYLE_CLASS_RICH_LIST);
@@ -64,8 +65,9 @@ public class ScreenCast.Dialog : Granite.Dialog {
             child = scrolled_window
         };
 
-        get_content_area ().append (frame);
+        custom_bin.append (frame);
 
+        resizable = true;
         default_height = 400;
         default_width = 300;
 

src/ScreenCast/Portal.vala

@@ -115,7 +115,7 @@ public class ScreenCast.Portal : Object {
             start.callback ();
         });
 
-        session.start (parent_window);
+        session.start (app_id, parent_window);
 
         yield;
 

src/ScreenCast/Session.vala

@@ -85,8 +85,19 @@ public class ScreenCast.Session : Object {
         this.cursor_mode = cursor_mode;
     }
 
-    internal void start (string parent_window) {
-        var dialog = new Dialog (source_types, allow_multiple);
+    internal void start (string app_id, string parent_window) {
+        var dialog = new Dialog (source_types, allow_multiple) {
+            image_icon = new ThemedIcon ("accessories-screencast-tool"),
+            primary_text = _("An application wants to access the screen"),
+            secondary_text = _("Select which parts of the screen to share:")
+        };
+
+        if (app_id != "") {
+            var app_info = new DesktopAppInfo (app_id + ".desktop");
+            if (app_info != null) {
+                dialog.primary_text = _("“%s” wants to access the screen").printf (app_info.get_display_name ());
+            }
+        }
 
         try {
             var parent = ExternalWindow.from_handle (parent_window);