add simple internal notification popup,

refactor MessageDialog

electrum/gui/qml/components/MessageDialog.qml

@@ -0,0 +1,61 @@
+import QtQuick 2.6
+import QtQuick.Layouts 1.0
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Material 2.0
+
+Dialog {
+    id: dialog
+    title: qsTr("Message")
+
+    property bool yesno: false
+    property alias text: message.text
+
+    signal yesClicked
+    signal noClicked
+
+    parent: Overlay.overlay
+    modal: true
+    x: (parent.width - width) / 2
+    y: (parent.height - height) / 2
+    Overlay.modal: Rectangle {
+        color: "#aa000000"
+    }
+
+    ColumnLayout {
+        TextArea {
+            id: message
+            Layout.preferredWidth: Overlay.overlay.width *2/3
+            readOnly: true
+            wrapMode: TextInput.WordWrap
+            //textFormat: TextEdit.RichText // existing translations not richtext yet
+            background: Rectangle {
+                color: 'transparent'
+            }
+        }
+
+        RowLayout {
+            Layout.alignment: Qt.AlignHCenter
+            Button {
+                text: qsTr('Ok')
+                visible: !yesno
+                onClicked: dialog.close()
+            }
+            Button {
+                text: qsTr('Yes')
+                visible: yesno
+                onClicked: {
+                    yesClicked()
+                    dialog.close()
+                }
+            }
+            Button {
+                text: qsTr('No')
+                visible: yesno
+                onClicked: {
+                    noClicked()
+                    dialog.close()
+                }
+            }
+        }
+    }
+}

electrum/gui/qml/components/NotificationPopup.qml

@@ -0,0 +1,57 @@
+import QtQuick 2.6
+import QtQuick.Layouts 1.0
+import QtQuick.Controls 2.3
+import QtQuick.Controls.Material 2.0
+
+Rectangle {
+    id: root
+
+    property alias text: textItem.text
+
+    property bool hide: true
+
+    color: Qt.lighter(Material.background, 1.5)
+    radius: constants.paddingXLarge
+
+    width: root.parent.width * 2/3
+    height: layout.height
+    x: (root.parent.width - width) / 2
+    y: -height
+
+    states: [
+        State {
+            name: 'expanded'; when: !hide
+            PropertyChanges { target: root; y: 100 }
+        }
+    ]
+
+    transitions: [
+        Transition {
+            from: ''; to: 'expanded'; reversible: true
+            NumberAnimation { properties: 'y'; duration: 300; easing.type: Easing.InOutQuad }
+        }
+    ]
+
+    RowLayout {
+        id: layout
+        width: parent.width
+        Text {
+            id: textItem
+            Layout.alignment: Qt.AlignHCenter
+            font.pixelSize: constants.fontSizeLarge
+            color: Material.foreground
+        }
+    }
+
+    Timer {
+        id: closetimer
+        interval: 5000
+        repeat: false
+        onTriggered: hide = true
+    }
+
+    Component.onCompleted: {
+        hide = false
+        closetimer.start()
+    }
+}

electrum/gui/qml/components/main.qml

@@ -169,62 +169,13 @@ ApplicationWindow
     property alias messageDialog: _messageDialog
     Component {
         id: _messageDialog
-        Dialog {
-            id: dialog
-            title: qsTr("Message")
-
-            property bool yesno: false
-            property alias text: message.text
-
-            signal yesClicked
-            signal noClicked
-
-            parent: Overlay.overlay
-            modal: true
-            x: (parent.width - width) / 2
-            y: (parent.height - height) / 2
-            Overlay.modal: Rectangle {
-                color: "#aa000000"
-            }
-
-            ColumnLayout {
-                TextArea {
-                    id: message
-                    Layout.preferredWidth: Overlay.overlay.width *2/3
-                    readOnly: true
-                    wrapMode: TextInput.WordWrap
-                    //textFormat: TextEdit.RichText // existing translations not richtext yet
-                    background: Rectangle {
-                        color: 'transparent'
-                    }
-                }
+        MessageDialog {}
+    }
 
-                RowLayout {
-                    Layout.alignment: Qt.AlignHCenter
-                    Button {
-                        text: qsTr('Ok')
-                        visible: !yesno
-                        onClicked: dialog.close()
-                    }
-                    Button {
-                        text: qsTr('Yes')
-                        visible: yesno
-                        onClicked: {
-                            yesClicked()
-                            dialog.close()
-                        }
-                    }
-                    Button {
-                        text: qsTr('No')
-                        visible: yesno
-                        onClicked: {
-                            noClicked()
-                            dialog.close()
-                        }
-                    }
-                }
-            }
-        }
+    property alias notificationPopup: _notificationPopup
+    Component {
+        id: _notificationPopup
+        NotificationPopup {}
     }
 
     Component.onCompleted: {