Warning dialogs.

data/mlm.gresource.xml

@@ -5,5 +5,6 @@
     <file preprocess="xml-stripblanks">mlm.ui</file>
     <file preprocess="xml-stripblanks">mlm.svg</file>
     <file preprocess="xml-stripblanks">shortcuts.ui</file>
+    <file preprocess="xml-stripblanks">warning.ui</file>
   </gresource>
 </gresources>

data/warning.ui

+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk+" version="3.20"/>
+  <template class="MLMWarningDialog" parent="GtkDialog">
+    <property name="visible">false</property>
+    <property name="type-hint">dialog</property>
+    <property name="icon">resource:///mx/unam/MLM/mlm.svg</property>
+    <child type="action">
+      <object class="GtkButton" id="understood_button">
+        <property name="label" translatable="yes">Understood</property>
+        <property name="visible">true</property>
+        <property name="can-default">true</property>
+      </object>
+    </child>
+    <child type="titlebar">
+      <object class="GtkHeaderBar" id="header">
+        <property name="visible">true</property>
+        <property name="title">Warning</property>
+        <child>
+          <object class="GtkBox" id="icon_box">
+            <property name="visible">True</property>
+            <property name="can-focus">False</property>
+            <property name="spacing">0</property>
+            <property name="orientation">horizontal</property>
+            <child>
+              <object class="GtkImage" id="dialog_icon">
+                <property name="visible">true</property>
+                <property name="can-focus">false</property>
+                <property name="margin-left">6</property>
+                <property name="tooltip-text" translatable="yes">Warning</property>
+                <property name="icon-name">dialog-warning-symbolic</property>
+                <property name="icon-size">1</property>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </child>
+    <child internal-child="vbox">
+      <object class="GtkBox">
+        <property name="orientation">horizontal</property>
+        <property name="spacing">2</property>
+        <child>
+          <object class="GtkLabel" id="message_label">
+            <property name="visible">true</property>
+            <property name="can-focus">false</property>
+            <property name="margin">20</property>
+          </object>
+        </child>
+        <child>
+          <object class="GtkImage" id="message_icon">
+            <property name="visible">true</property>
+            <property name="can-focus">false</property>
+            <property name="margin">20</property>
+            <property name="icon-name">dialog-warning-symbolic</property>
+            <property name="icon-size">5</property>
+          </object>
+        </child>
+      </object>
+    </child>
+    <action-widgets>
+      <action-widget response="ok" default="true">understood_button</action-widget>
+    </action-widgets>
+  </template>
+</interface>

meson.build

@@ -135,7 +135,8 @@ mlm_gui_sources = [
   'src/application/main.vala',
   'src/application/media.vala',
   'src/application/player.vala',
-  'src/application/shortcuts-window.vala'
+  'src/application/shortcuts-window.vala',
+  'src/application/warning-dialog.vala'
 ]
 
 mlm_gui_dependencies = [

src/application/application-window.vala

@@ -417,7 +417,9 @@ namespace MLM {
                 FileUtils.get_data(fn, out data);
                 return data;
             } catch (GLib.FileError fe) {
-                warning(_("There was an error loading image '%s'").printf(fn));
+                var bn = GLib.Path.get_basename(fn);
+                var m = _("There was an error loading image '%s'").printf(bn);
+                show_warning(m);
             }
             return null;
         }
@@ -447,12 +449,19 @@ namespace MLM {
                                             (int)(pixbuf.height*scale),
                                             Gdk.InterpType.BILINEAR);
             } catch (GLib.Error e) {
-                warning(_("Could not set pixbuf from data."));
+                show_warning(_("Could not set pixbuf from data."));
                 set_default_image(image);
                 return;
             }
             save_button.sensitive = true;
             image.set_from_pixbuf(thumb);
         }
+
+        /* Shows a warning dialog. */
+        private void show_warning(string message) {
+            var dialog = new WarningDialog(this, message);
+            dialog.run();
+            dialog.destroy();
+        }
     }
 }

src/application/application.vala

@@ -277,7 +277,7 @@ namespace MLM {
         /* The shortcuts action. */
         private void shortcuts() {
             if (shortcuts_window == null)
-                shortcuts_window = new ShortcutsWindow();
+                shortcuts_window = new ShortcutsWindow(window);
             shortcuts_window.show_all();
         }
 

src/application/shortcuts-window.vala

@@ -23,5 +23,13 @@ namespace MLM {
      * Class for shortcuts windows.
      */
     [GtkTemplate (ui = "/mx/unam/MLM/shortcuts.ui")]
-    public class ShortcutsWindow : Gtk.ShortcutsWindow {}
+    public class ShortcutsWindow : Gtk.ShortcutsWindow {
+
+        /**
+         * Initializes a shortcuts window.
+         */
+        public ShortcutsWindow(Gtk.Window window) {
+            transient_for = window;
+        }
+    }
 }

src/application/warning-dialog.vala

+/*
+ * This file is part of mlm.
+ *
+ * Copyright © 2016-2018 Canek Peláez Valdés
+ *
+ * This program is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later
+ * version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace MLM {
+
+    /**
+     * Class for warning dialogs.
+     */
+    [GtkTemplate (ui = "/mx/unam/MLM/warning.ui")]
+    public class WarningDialog : Gtk.Dialog {
+
+        [GtkChild]
+        private Gtk.Label message_label;
+
+        /**
+         * Initializes a shortcuts window.
+         */
+        public WarningDialog(Gtk.Window window, string message) {
+            GLib.Object(use_header_bar: 1);
+            transient_for = window;
+            message_label.label = message;
+        }
+    }
+}