Manage bookmarks

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Sample viewer app

Access and create bookmarks on a map.

screenshot

Use case

Bookmarks are used for easily storing and accessing saved locations on the map. Bookmarks are of interest in educational apps (e.g. touring historical sites) or more specifically, for a land management company wishing to visually monitor flood levels over time at a particular location. These locations can be saved as bookmarks and revisited easily each time their basemap data has been updated (e.g. working with up to date satellite imagery to monitor water levels).

How to use the sample

The map in the sample comes pre-populated with a set of bookmarks. To access a bookmark and move to that location, click on a bookmark's name from the list. To add a bookmark, pan and/or zoom to a new location and click on the '+' in the bottom corner. Enter a unique name for the bookmark and click ok, and the bookmark will be added to the list

How it works

  1. Create a new Map object and create a BookmarkList with Map::bookmarks().
  2. To create a new bookmark and add it to the bookmark list:

    • Create a new Bookmark object passing in text (the name of the bookmark) and a Viewpoint as parameters.
    • Add the new bookmark to the book mark list with BookmarkListModel::append(bookmark).

Relevant API

  • Bookmark
  • BookmarkListModel
  • Viewpoint

Tags

bookmark, extent, location, zoom

Sample Code

ManageBookmarks.qmlManageBookmarks.cppManageBookmarks.h
                                                                                                                                                                        
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// [WriteFile Name=ManageBookmarks, Category=Maps]
// [Legal]
// Copyright 2016 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick 2.6
import QtQuick.Controls 2.2
import QtQuick.Layouts 1.3
import Esri.Samples 1.0

ManageBookmarksSample {
    id: manageBookmarksSample
    width: 800
    height: 600

    // add a mapView component
    MapView {
        id: mapView
        anchors.fill: parent
        objectName: "mapView"

        // Create the add button so new bookmarks can be added
        Rectangle {
            id: addButton
            property bool pressed: false
            anchors {
                right: parent.right
                bottom: mapView.attributionTop
                rightMargin: 20
                bottomMargin: 20
            }
            width: childrenRect.width
            height: childrenRect.height
            color: pressed ? "#959595" : "#D6D6D6"
            radius: 100
            border {
                color: "#585858"
                width: 1
            }

            Image {
                rotation: 45
                source: "qrc:/Samples/Maps/ManageBookmarks/add.png"
                width: 32
                height: 32
            }

            MouseArea {
                anchors.fill: parent
                onPressed: addButton.pressed = true
                onReleased: addButton.pressed = false
                onClicked: {
                    // Show the add window when it is clicked
                    addWindow.visible = true;
                }
            }
        }
    }

    //! [Use BookmarkListModel in View]
    ComboBox {
        id: bookmarkComboBox
        anchors {
            left: parent.left
            top: parent.top
            margins: 15
        }
        property int bestWidth: implicitWidth
        width: bestWidth + indicator.width + leftPadding + rightPadding
        // Set the model to the BookmarkListModel
        model: manageBookmarksSample.bookmarks

        onModelChanged: {
            const model = bookmarkComboBox.model;
            if (model)
            {
                let w = bestWidth;
                for (let i = 0; i < model.rowCount(); ++i) {
                    metrics.text = manageBookmarksSample.bookmarkNameForIndex(i);
                    w = Math.max(w, metrics.width);
                }
                bestWidth = w;
            }
        }

        onCurrentTextChanged: {
            // Call C++ invokable function to to go to the bookmark
            manageBookmarksSample.goToBookmark(bookmarkComboBox.currentIndex);
        }

        TextMetrics {
            id: metrics
            font: bookmarkComboBox.font
        }
    }
    //! [Use BookmarkListModel in View]


    // Create a window so names for new bookmarks can be specified
    Rectangle {
        id: addWindow
        visible: false
        enabled: visible
        color: "lightgrey"
        opacity: .9
        radius: 5
        anchors.centerIn: parent
        width: childrenRect.width
        height: childrenRect.height
        border {
            color: "#4D4D4D"
            width: 1
        }

        MouseArea {
            anchors.fill: parent
            onClicked: mouse.accepted = true;
        }

        GridLayout {
            columns: 2
            Text {
                text: qsTr("Provide the bookmark name")
                Layout.columnSpan: 2
                Layout.margins: 5
            }

            TextField {
                id: textField
                placeholderText: qsTr("ex: Grand Canyon")
                selectByMouse: true
                Layout.columnSpan: 2
                Layout.margins: 5
                Layout.fillWidth: true
            }

            Button {
                text: qsTr("Cancel")
                onClicked: addWindow.visible = false;
                Layout.margins: 5
            }

            Button {
                text: qsTr("Done")
                Layout.margins: 5
                Layout.alignment: Qt.AlignRight
                onClicked: {
                    // Call the C++ invokable function and pass in the name specified
                    manageBookmarksSample.addBookmark(textField.text);
                    bookmarkComboBox.currentIndex = bookmarkComboBox.count - 1;
                    textField.text = "";
                    addWindow.visible = false;
                }
            }
        }
    }
}

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