qml: add WindowDialog

WindowDialog is a wrapper of QtQuick.Window which
provides a simple base for qml based dialogs. It
is intended to be an alternative to Qt.labs.platform
Dialog and Qt Quick Controls 2 Dialog.

Signed-off-by: Pierre Lamot <pierre@videolabs.io>

modules/gui/qt/Makefile.am

@@ -646,6 +646,7 @@ libqt_plugin_la_QML = \
 	gui/qt/dialogs/dialogs/qml/CustomDialog.qml \
 	gui/qt/dialogs/dialogs/qml/Dialogs.qml \
 	gui/qt/dialogs/dialogs/qml/ModalDialog.qml \
+	gui/qt/dialogs/dialogs/qml/WindowDialog.qml \
 	gui/qt/dialogs/help/qml/About.qml \
 	gui/qt/dialogs/toolbar/qml/EditorDNDDelegate.qml \
 	gui/qt/dialogs/toolbar/qml/EditorDNDView.qml\

modules/gui/qt/dialogs/dialogs/qml/WindowDialog.qml

@@ -0,0 +1,101 @@
+/*****************************************************************************
+ * Copyright (C) 2021 VLC authors and VideoLAN
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+import QtQuick 2.11
+import QtQuick.Window 2.11
+import QtQuick.Layouts 1.11
+import QtQuick.Controls 2.4
+
+import "qrc:///widgets/" as Widgets
+import "qrc:///style/"
+
+Window {
+    id: root
+
+    flags: Qt.Dialog
+
+    property bool modal: false
+    modality: modal ? Qt.ApplicationModal : Qt.NonModal
+
+    width: VLCStyle.appWidth * 0.75
+    height: VLCStyle.appHeight * 0.85
+
+    title: i18n.qtr("Dialog")
+    color: VLCStyle.colors.bg
+
+    property alias contentComponent: loader.sourceComponent
+    property alias standardButtons: buttonBox.standardButtons
+
+    signal accepted()
+    signal rejected(bool byButton)
+    signal applied()
+    signal discarded()
+    signal reset()
+
+    onAccepted: hide()
+    onRejected: if (byButton) hide()
+    onApplied: hide()
+    onDiscarded: hide()
+    onReset: hide()
+
+    onClosing: {
+        rejected(false)
+    }
+
+    function open() {
+        show()
+    }
+
+    ColumnLayout {
+        anchors.fill: parent
+        anchors.margins: VLCStyle.margin_small
+
+        Loader {
+            id: loader
+            Layout.fillHeight: true
+            Layout.fillWidth: true
+
+            clip: true
+            sourceComponent: contentComponent
+        }
+
+        DialogButtonBox {
+            id: buttonBox
+
+            bottomPadding: 0
+            topPadding: 0
+            padding: VLCStyle.margin_small
+            spacing: VLCStyle.margin_small
+
+            Layout.fillWidth: true
+            Layout.minimumHeight: VLCStyle.icon_normal
+
+            standardButtons: DialogButtonBox.Ok | DialogButtonBox.Cancel
+
+            onAccepted: root.accepted()
+            onRejected: root.rejected(true)
+            onApplied: root.applied()
+            onDiscarded: root.discarded()
+            onReset: root.reset()
+
+            // Customize DialogButtonBox so that it matches with the app theme
+            background: Item { }
+            delegate: Widgets.TextToolButton { }
+        }
+    }
+}

modules/gui/qt/vlc.qrc

@@ -339,6 +339,7 @@
         <file alias="CustomDialog.qml">dialogs/dialogs/qml/CustomDialog.qml</file>
         <file alias="Dialogs.qml">dialogs/dialogs/qml/Dialogs.qml</file>
         <file alias="ModalDialog.qml">dialogs/dialogs/qml/ModalDialog.qml</file>
+        <file alias="WindowDialog.qml">dialogs/dialogs/qml/WindowDialog.qml</file>
         <file alias="EditorDummyButton.qml">dialogs/toolbar/qml/EditorDummyButton.qml</file>
         <file alias="EditorDNDDelegate.qml">dialogs/toolbar/qml/EditorDNDDelegate.qml</file>
         <file alias="ToolbarEditorButtonList.qml">dialogs/toolbar/qml/ToolbarEditorButtonList.qml</file>

po/POTFILES.in

@@ -801,6 +801,7 @@ modules/gui/qt/util/validators.cpp
 modules/gui/qt/util/validators.hpp
 modules/gui/qt/dialogs/dialogs/qml/CustomDialog.qml
 modules/gui/qt/dialogs/dialogs/qml/Dialogs.qml
+modules/gui/qt/dialogs/dialogs/qml/WindowDialog.qml
 modules/gui/qt/dialogs/help/qml/About.qml
 modules/gui/qt/dialogs/toolbar/qml/ToolbarEditor.qml
 modules/gui/qt/maininterface/qml/BannerSources.qml