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<h1 class="title">image-gallery.qml Example File</h1>
<span class="subtitle">image-gallery/image-gallery.qml</span>
<!-- $$$image-gallery/image-gallery.qml-description -->
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<pre class="qml">
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the 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 Qt Company Ltd 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
** OWNER 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
import Enginio 1.0
import QtQuick.Dialogs 1.0
import QtQuick.Controls 1.0
import QtQuick.Layouts 1.0
/*
* Enginio image gallery example.
*
* Main window contains list of enginioModel on the backend and button for uploading
* new enginioModel. Image list contains image thumbnail (generated by Enginio
* backend) and some image metadata. Clicking list items downloads image file
* and displays it in dialog window. Clicking the red x deletes enginioModel from
* backend.
*
* In the backend enginioModel are represented as objects of type "objects.image". These
* objects contain a property "file" which is a reference to the actual binary file.
*/
Item {
id: main
width: 460
height: 640
BackendHelper{
id: backendHelper
}
property var imagesUrl: new Object
Rectangle {
id: root
anchors.fill: parent
opacity: 1 - backendHelper.opacity
color: "#f4f4f4"
// Enginio client specifies the backend to be used
EnginioClient {
id: client
backendId: backendHelper.backendId
onError: console.log("Enginio error: " + reply.errorCode + ": " + reply.errorString)
}
EnginioModel {
id: enginioModel
client: client
query: { // query for all objects of type "objects.image" and include not null references to files
"objectType": "objects.image",
"include": {"file": {}},
"query" : { "file": { "$ne": null } }
}
}
// Delegate for displaying individual rows of the model
Component {
id: imageListDelegate
BorderImage {
height: 120
width: parent.width
border.top: 4
border.bottom: 4
source: hitbox.pressed ? "qrc:images/delegate_pressed.png" : "qrc:images/delegate.png"
Image {
id: shadow
anchors.top: parent.bottom
width: parent.width
visible: !hitbox.pressed
source: "qrc:images/shadow.png"
}
Image {
id: image
x: 10
width: 100
height: 100
anchors.verticalCenter: parent.verticalCenter
opacity: image.status == Image.Ready ? 1 : 0
Behavior on opacity { NumberAnimation { duration: 100 } }
Component.onCompleted: {
if (id in imagesUrl) {
image.source = imagesUrl[id]
} else {
var data = { "id": file.id,
"variant": "thumbnail"}
var reply = client.downloadUrl(data)
reply.finished.connect(function() {
imagesUrl[id] = reply.data.expiringUrl
if (image && reply.data.expiringUrl) // It may be deleted as it is delegate
image.source = reply.data.expiringUrl
})
}
}
}
Rectangle {
color: "transparent"
anchors.fill: image
border.color: "#aaa"
Rectangle {
id: progressBar
property real value: image.progress
anchors.bottom: parent.bottom
width: image.width * value
height: 4
color: "#49f"
opacity: image.status != Image.Ready ? 1 : 0
Behavior on opacity {NumberAnimation {duration: 100}}
}
}
Column {
anchors.left: image.right
anchors.right: deleteIcon.left
anchors.margins: 12
y: 10
Text {
height: 33
width: parent.width
verticalAlignment: Text.AlignVCenter
font.pixelSize: height * 0.5
text: name ? name : ""
elide: Text.ElideRight
}
Text {
height: 33
width: parent.width
verticalAlignment: Text.AlignVCenter
font.pixelSize: height * 0.5
text: sizeStringFromFile(file)
elide:Text.ElideRight
color: "#555"
}
Text {
height: 33
width: parent.width
verticalAlignment: Text.AlignVCenter
font.pixelSize: height * 0.5
text: timeStringFromFile(file)
elide:Text.ElideRight
color: "#555"
}
}
// Clicking list item opens full size image in separate dialog
MouseArea {
id: hitbox
anchors.fill: parent
onClicked: {
imageDialog.fileId = file.id;
imageDialog.visible = true
root.state = "view"
}
}
// Delete button
Image {
id: deleteIcon
anchors.right: parent.right
anchors.verticalCenter: parent.verticalCenter
anchors.rightMargin: 18
source: removeMouseArea.pressed ?"qrc:icons/delete_icon_pressed.png" : "qrc:icons/delete_icon.png"
MouseArea {
id: removeMouseArea
anchors.fill: parent
anchors.margins: -10
onClicked: enginioModel.remove(index)
}
}
}
}
// A simple layout:
// a listview and a line edit with button to add to the list
Rectangle {
id: header
anchors.top: parent.top
width: parent.width
height: 70
color: "white"
Row {
id: logo
anchors.centerIn: parent
anchors.horizontalCenterOffset: -4
spacing: 6
Image {
source: "qrc:images/enginio.png"
width:160 ; height: 60
fillMode:Image.PreserveAspectFit
}
Text {
text: "Gallery"
anchors.verticalCenter: parent.verticalCenter
anchors.verticalCenterOffset: -3
font.bold: true
font.pixelSize: 46
color: "#555"
}
}
Rectangle {
width: parent.width ; height: 1
anchors.bottom: parent.bottom
color: "#bbb"
}
}
Row {
id: listLayout
Behavior on x {NumberAnimation{ duration: 400 ; easing.type: "InOutCubic"}}
anchors.top: header.bottom
anchors.bottom: footer.top
ListView {
id: imageListView
model: enginioModel // get the data from EnginioModel
delegate: imageListDelegate
clip: true
width: root.width
height: parent.height
// Animations
add: Transition { NumberAnimation { properties: "y"; from: root.height; duration: 250 } }
removeDisplaced: Transition { NumberAnimation { properties: "y"; duration: 150 } }
remove: Transition { NumberAnimation { property: "opacity"; to: 0; duration: 150 } }
}
// Dialog for showing full size image
Rectangle {
id: imageDialog
width: root.width
height: parent.height
property string fileId
color: "#333"
onFileIdChanged: {
image.source = ""
// Download the full image, not the thumbnail
var data = { "id": fileId }
var reply = client.downloadUrl(data)
reply.finished.connect(function() {
image.source = reply.data.expiringUrl
})
}
Label {
id: label
text: "Loading ..."
font.pixelSize: 28
color: "white"
anchors.centerIn: parent
visible: image.status != Image.Ready
}
Rectangle {
property real value: image.progress
anchors.bottom: parent.bottom
width: parent.width * value
height: 4
color: "#49f"
Behavior on opacity {NumberAnimation {duration: 200}}
opacity: image.status !== Image.Ready ? 1 : 0
}
Image {
id: image
anchors.fill: parent
anchors.margins: 10
smooth: true
cache: false
fillMode: Image.PreserveAspectFit
Behavior on opacity { NumberAnimation { duration: 100 } }
opacity: image.status === Image.Ready ? 1 : 0
}
MouseArea {
anchors.fill: parent
onClicked: root.state = ""
}
}
}
BorderImage {
id: footer
width: parent.width
anchors.bottom: parent.bottom
source: addMouseArea.pressed ? "qrc:images/delegate_pressed.png" : "qrc:images/delegate.png"
border.left: 5; border.top: 5
border.right: 5; border.bottom: 5
Rectangle {
y: -1 ; height: 1
width: parent.width
color: "#bbb"
}
Rectangle {
y: 0 ; height: 1
width: parent.width
color: addMouseArea.pressed ? "transparent" : "white"
}
Text {
text: "Click to upload..."
font.bold: true
font.pixelSize: 28
color: "#444"
anchors.centerIn: parent
}
Item {
id: addButton
width: 40 ; height: 40
anchors.margins: 20
anchors.right: parent.right
anchors.verticalCenter: parent.verticalCenter
Image {
id: removeIcon
source: addMouseArea.pressed ? "qrc:icons/add_icon_pressed.png" : "qrc:icons/add_icon.png"
anchors.centerIn: parent
}
}
MouseArea {
id: addMouseArea
anchors.fill: parent
onClicked: fileDialog.visible = true;
}
Rectangle {
id: progressBar
property real value:0
anchors.bottom: parent.bottom
width: parent.width * value
height: 4
color: "#49f"
Behavior on opacity {NumberAnimation {duration: 100}}
}
}
// File dialog for selecting image file from local file system
FileDialog {
id: fileDialog
title: "Select image file to upload"
nameFilters: [ "Image files (*.png *.jpg *.jpeg)", "All files (*)" ]
onSelectionAccepted: {
var pathParts = fileUrl.toString().split("/");
var fileName = pathParts[pathParts.length - 1];
var fileObject = {
objectType: "objects.image",
name: fileName,
localPath: fileUrl.toString()
}
var reply = client.create(fileObject);
reply.finished.connect(function() {
var uploadData = {
file: { fileName: fileName },
targetFileProperty: {
objectType: "objects.image",
id: reply.data.id,
propertyName: "file"
},
};
imagesUrl[reply.data.id] = reply.data.localPath
var uploadReply = client.uploadFile(uploadData, fileUrl)
progressBar.opacity = 1
uploadReply.progress.connect(function(progress, total) {
progressBar.value = progress/total
})
uploadReply.finished.connect(function() {
var tmp = enginioModel.query; enginioModel.query = null; enginioModel.query = tmp;
progressBar.opacity = 0
})
})
}
}
states: [
State {
name: "view"
PropertyChanges {
target: listLayout
x: -root.width
}
}
]
}
function sizeStringFromFile(fileData) {
var str = [];
if (fileData && fileData.fileSize) {
str.push("Size: ");
str.push(fileData.fileSize);
str.push(" bytes");
}
return str.join("");
}
function doubleDigitNumber(number) {
if (number < 10)
return "0" + number;
return number;
}
function timeStringFromFile(fileData) {
var str = [];
if (fileData && fileData.createdAt) {
var date = new Date(fileData.createdAt);
if (date) {
str.push("Uploaded: ");
str.push(date.toDateString());
str.push(" ");
str.push(doubleDigitNumber(date.getHours()));
str.push(":");
str.push(doubleDigitNumber(date.getMinutes()));
}
}
return str.join("");
}
}
</pre>
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<!-- @@@image-gallery/image-gallery.qml -->
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distrib
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7
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4ff6143ff2a088c33c83add3bab6e293
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146
