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/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 2.14
import QtQuick.Controls 2.14
import QtQuick.Layouts 1.14
import QtQuick.Pdf 5.15
import QtQuick.Shapes 1.14
import QtQuick.Window 2.14
Item {
// public API
// TODO 5.15: required property
property var document: undefined
property bool debug: false
property string selectedText
function copySelectionToClipboard() {
var currentItem = tableView.itemAtPos(0, tableView.contentY + root.height / 2)
if (debug)
console.log("currentItem", currentItem, "sel", currentItem.selection.text)
if (currentItem !== null)
currentItem.selection.copyToClipboard()
}
// page navigation
property alias currentPage: navigationStack.currentPage
property alias backEnabled: navigationStack.backAvailable
property alias forwardEnabled: navigationStack.forwardAvailable
function back() { navigationStack.back() }
function forward() { navigationStack.forward() }
function goToPage(page) {
if (page === navigationStack.currentPage)
return
goToLocation(page, Qt.point(0, 0), 0)
}
function goToLocation(page, location, zoom) {
if (zoom > 0)
root.renderScale = zoom
navigationStack.push(page, location, zoom)
}
// page scaling
property real renderScale: 1
property real pageRotation: 0
function resetScale() { root.renderScale = 1 }
function scaleToWidth(width, height) {
root.renderScale = width / (tableView.rot90 ? tableView.firstPagePointSize.height : tableView.firstPagePointSize.width)
}
function scaleToPage(width, height) {
var windowAspect = width / height
var pageAspect = tableView.firstPagePointSize.width / tableView.firstPagePointSize.height
if (tableView.rot90) {
if (windowAspect > pageAspect) {
root.renderScale = height / tableView.firstPagePointSize.width
} else {
root.renderScale = width / tableView.firstPagePointSize.height
}
} else {
if (windowAspect > pageAspect) {
root.renderScale = height / tableView.firstPagePointSize.height
} else {
root.renderScale = width / tableView.firstPagePointSize.width
}
}
}
// text search
property alias searchModel: searchModel
property alias searchString: searchModel.searchString
function searchBack() { --searchModel.currentResult }
function searchForward() { ++searchModel.currentResult }
id: root
TableView {
id: tableView
anchors.fill: parent
model: root.document === undefined ? 0 : root.document.pageCount
rowSpacing: 6
property real rotationModulus: Math.abs(root.pageRotation % 180)
property bool rot90: rotationModulus > 45 && rotationModulus < 135
onRot90Changed: forceLayout()
property size firstPagePointSize: document === undefined ? Qt.size(0, 0) : document.pagePointSize(0)
contentWidth: document === undefined ? 0 : document.maxPageWidth * root.renderScale
// workaround for missing function (see https://codereview.qt-project.org/c/qt/qtdeclarative/+/248464)
function itemAtPos(x, y, includeSpacing) {
// we don't care about x (assume col 0), and assume includeSpacing is true
var ret = null
for (var i = 0; i < contentItem.children.length; ++i) {
var child = contentItem.children[i];
if (root.debug)
console.log(child, "@y", child.y)
if (child.y < y && (!ret || child.y > ret.y))
ret = child
}
if (root.debug)
console.log("given y", y, "found", ret, "@", ret.y)
return ret // the delegate with the largest y that is less than the given y
}
rowHeightProvider: function(row) { return (rot90 ? document.pagePointSize(row).width : document.pagePointSize(row).height) * root.renderScale }
delegate: Rectangle {
id: pageHolder
color: root.debug ? "beige" : "transparent"
Text {
visible: root.debug
anchors { right: parent.right; verticalCenter: parent.verticalCenter }
rotation: -90; text: pageHolder.width.toFixed(1) + "x" + pageHolder.height.toFixed(1) + "\n" +
image.width.toFixed(1) + "x" + image.height.toFixed(1)
}
implicitWidth: Math.max(root.width, (tableView.rot90 ? document.maxPageHeight : document.maxPageWidth) * root.renderScale)
implicitHeight: tableView.rot90 ? image.width : image.height
onImplicitWidthChanged: tableView.forceLayout()
objectName: "page " + index
property int delegateIndex: row // expose the context property for JS outside of the delegate
property alias selection: selection
Rectangle {
id: paper
width: image.width
height: image.height
rotation: root.pageRotation
anchors.centerIn: parent
property size pagePointSize: document.pagePointSize(index)
property real pageScale: image.paintedWidth / pagePointSize.width
Image {
id: image
source: document.source
currentFrame: index
asynchronous: true
fillMode: Image.PreserveAspectFit
width: paper.pagePointSize.width * root.renderScale
height: paper.pagePointSize.height * root.renderScale
property real renderScale: root.renderScale
property real oldRenderScale: 1
onRenderScaleChanged: {
image.sourceSize.width = paper.pagePointSize.width * renderScale
image.sourceSize.height = 0
paper.scale = 1
}
}
Shape {
anchors.fill: parent
opacity: 0.25
visible: image.status === Image.Ready
ShapePath {
strokeWidth: 1
strokeColor: "cyan"
fillColor: "steelblue"
scale: Qt.size(paper.pageScale, paper.pageScale)
PathMultiline {
paths: searchModel.boundingPolygonsOnPage(index)
}
}
ShapePath {
fillColor: "orange"
scale: Qt.size(paper.pageScale, paper.pageScale)
PathMultiline {
id: selectionBoundaries
paths: selection.geometry
}
}
}
Shape {
anchors.fill: parent
opacity: 0.5
visible: image.status === Image.Ready && searchModel.currentPage === index
ShapePath {
strokeWidth: 1
strokeColor: "blue"
fillColor: "cyan"
scale: Qt.size(paper.pageScale, paper.pageScale)
PathMultiline {
paths: searchModel.currentResultBoundingPolygons
}
}
}
PinchHandler {
id: pinch
minimumScale: 0.1
maximumScale: root.renderScale < 4 ? 2 : 1
minimumRotation: 0
maximumRotation: 0
enabled: image.sourceSize.width < 5000
onActiveChanged:
if (active) {
paper.z = 10
} else {
paper.z = 0
var newSourceWidth = image.sourceSize.width * paper.scale
var ratio = newSourceWidth / image.sourceSize.width
if (ratio > 1.1 || ratio < 0.9) {
paper.scale = 1
root.renderScale *= ratio
}
}
grabPermissions: PointerHandler.CanTakeOverFromAnything
}
DragHandler {
id: textSelectionDrag
acceptedDevices: PointerDevice.Mouse | PointerDevice.Stylus
target: null
}
TapHandler {
id: tapHandler
acceptedDevices: PointerDevice.Mouse | PointerDevice.Stylus
}
Repeater {
model: PdfLinkModel {
id: linkModel
document: root.document
page: image.currentFrame
}
delegate: Rectangle {
color: "transparent"
border.color: "lightgrey"
x: rect.x * paper.pageScale
y: rect.y * paper.pageScale
width: rect.width * paper.pageScale
height: rect.height * paper.pageScale
MouseArea { // TODO switch to TapHandler / HoverHandler in 5.15
id: linkMA
anchors.fill: parent
cursorShape: Qt.PointingHandCursor
hoverEnabled: true
onClicked: {
if (page >= 0)
root.goToLocation(page, location, zoom)
else
Qt.openUrlExternally(url)
}
}
ToolTip {
visible: linkMA.containsMouse
delay: 1000
text: page >= 0 ?
("page " + (page + 1) +
" location " + location.x.toFixed(1) + ", " + location.y.toFixed(1) +
" zoom " + zoom) : url
}
}
}
}
PdfSelection {
id: selection
document: root.document
page: image.currentFrame
fromPoint: Qt.point(textSelectionDrag.centroid.pressPosition.x / paper.pageScale,
textSelectionDrag.centroid.pressPosition.y / paper.pageScale)
toPoint: Qt.point(textSelectionDrag.centroid.position.x / paper.pageScale,
textSelectionDrag.centroid.position.y / paper.pageScale)
hold: !textSelectionDrag.active && !tapHandler.pressed
onTextChanged: root.selectedText = text
}
}
ScrollBar.vertical: ScrollBar {
property bool moved: false
onPositionChanged: moved = true
onActiveChanged: {
var currentItem = tableView.itemAtPos(0, tableView.contentY + root.height / 2)
var currentPage = currentItem.delegateIndex
var currentLocation = Qt.point((tableView.contentX - currentItem.x + root.width / 2) / root.renderScale,
(tableView.contentY - currentItem.y + root.height / 2) / root.renderScale)
if (active) {
moved = false
navigationStack.push(currentPage, currentLocation, root.renderScale)
} else if (moved) {
navigationStack.update(currentPage, currentLocation, root.renderScale)
}
}
}
ScrollBar.horizontal: ScrollBar { }
}
onRenderScaleChanged: {
tableView.forceLayout()
var currentItem = tableView.itemAtPos(tableView.contentX + root.width / 2, tableView.contentY + root.height / 2)
if (currentItem !== undefined)
navigationStack.update(currentItem.delegateIndex, Qt.point(currentItem.x / renderScale, currentItem.y / renderScale), renderScale)
}
PdfNavigationStack {
id: navigationStack
onJumped: {
root.renderScale = zoom
tableView.contentX = Math.max(0, location.x - root.width / 2) * root.renderScale
tableView.contentY = tableView.originY + root.document.heightSumBeforePage(page, tableView.rowSpacing / root.renderScale) * root.renderScale
if (root.debug) {
console.log("going to page", page,
"@y", root.document.heightSumBeforePage(page, tableView.rowSpacing / root.renderScale) * root.renderScale,
"ended up @", tableView.contentY, "originY is", tableView.originY)
}
}
}
PdfSearchModel {
id: searchModel
document: root.document === undefined ? null : root.document
onCurrentPageChanged: root.goToPage(currentPage)
}
}
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