[PageStack] be pageStack sagety

examples/touch/content/BrokenPage.qml

+import QtQuick 2.6
+
+SomeBrokenPage {
+
+}

examples/touch/glacier-components.qml

@@ -133,6 +133,10 @@ ApplicationWindow {
             title: "Notifications"
             page: "content/NotificationsPage.qml"
         }
+        ListElement {
+            title: "Broken page"
+            page: "content/BrokenPage.qml"
+        }
     }
 
 

src/controls/controls.pro

@@ -27,8 +27,9 @@ QML_FILES += \
     qml/DatePicker.qml \
     qml/TimePicker.qml \
     qml/ScrollDecorator.qml \
-    qml/dialogs/QueryDialog.qml \
     qml/TextField.qml \
+    qml/ErrorStackPage.qml \
+    qml/dialogs/QueryDialog.qml \
     qml/dialogs/SelectionDialog.qml \
     qml/dialogs/Dialog.qml
 

src/controls/qml/ApplicationWindow.qml

@@ -66,6 +66,50 @@ NemoWindow {
         }
     }
 
+    //Safety version of pageStack.push - if we can't load component - show error page page with
+    //error message and back button
+
+    function push(url, params) {
+        if(!params){
+            params = {}
+        }
+        console.log("##", url, params, pageStack)
+        var component = Qt.createComponent(url)
+        if (component.status === Component.Ready) {
+            pageStack.push(component.createObject(pageStack, params))
+        } else {
+            console.warn("Error loading component", url, component.errorString())
+            pageStack.push(Qt.resolvedUrl("ErrorStackPage.qml"), {error: component.errorString()})
+        }
+    }
+
+    Timer {
+        id: _errorTimer
+        property string errorString
+        interval: 50
+        repeat: false
+        onTriggered: {
+            pageStack.replace(Qt.resolvedUrl("ErrorStackPage.qml"), {error: errorString})
+            errorString = ""
+        }
+    }
+
+    Connections {
+        target: pageStack
+        onBusyChanged: {
+            if (_errorTimer.errorString && !pageStack.busy) {
+                _errorTimer.start()
+            }
+        }
+
+        onCurrentItemChanged: {
+            var qmltype = pageStack.currentItem.toString()
+            if (qmltype.slice(0, 10) === "QQuickText") {
+                _errorTimer.errorString = pageStack.currentItem.text
+            }
+        }
+    }
+
     function orientationConstraintsChanged()
     {
         //if the current orientation is not allowed anymore, fallback to an allowed one

src/controls/qml/ErrorStackPage.qml

+/****************************************************************************************
+**
+** Copyright (C) 2018 Chupligin Sergey <neochapay@gmail.com>
+** All rights reserved.
+**
+** You may use this file under the terms of BSD license as follows:
+**
+** Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are met:
+**     * Redistributions of source code must retain the above copyright
+**       notice, this list of conditions and the following disclaimer.
+**     * Redistributions in binary form must reproduce the above copyright
+**       notice, this list of conditions and the following disclaimer in the
+**       documentation and/or other materials provided with the distribution.
+**     * Neither the name of the author nor the
+**       names of its contributors may be used to endorse or promote products
+**       derived from this software without specific prior written permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+** WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+** DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR
+** ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+** (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+** LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+** ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+** SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+**
+****************************************************************************************/
+
+import QtQuick 2.6
+import QtQuick.Controls.Styles.Nemo 1.0
+
+Page {
+    id: root
+
+    property alias error: errorLabel.text
+
+    headerTools: HeaderToolsLayout {
+        showBackButton: true;
+        title: qsTr("Error")
+    }
+
+    Column {
+        spacing: 40
+        width: parent.width
+        anchors.centerIn: parent
+        Label {
+            id: errorLabel
+            width: parent.width
+            text: qsTr("We got some error")
+            wrapMode: Text.WrapAtWordBoundaryOrAnywhere
+        }
+    }
+}