| /**************************************************************************** |
| ** |
| ** Copyright (C) 2020 The Qt Company Ltd. |
| ** Contact: http://www.qt.io/licensing/ |
| ** |
| ** This file is part of the QtPDF module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL3$ |
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| ** GNU Lesser General Public License Usage |
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| ** General Public License version 3 as published by the Free Software |
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| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or later as published by the Free |
| ** Software Foundation and appearing in the file LICENSE.GPL included in |
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| ** $QT_END_LICENSE$ |
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| ****************************************************************************/ |
| import QtQuick 2.14 |
| import QtQuick.Controls 2.14 |
| import QtQuick.Pdf 5.15 |
| import QtQuick.Shapes 1.14 |
| import Qt.labs.animation 1.0 |
| |
| Flickable { |
| // public API |
| // TODO 5.15: required property |
| property var document: undefined |
| property bool debug: false |
| property alias status: image.status |
| |
| property alias selectedText: selection.text |
| function selectAll() { |
| selection.selectAll() |
| } |
| function copySelectionToClipboard() { |
| 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 |
| property alias sourceSize: image.sourceSize |
| function resetScale() { |
| paper.scale = 1 |
| root.renderScale = 1 |
| } |
| function scaleToWidth(width, height) { |
| var pagePointSize = document.pagePointSize(navigationStack.currentPage) |
| root.renderScale = root.width / (paper.rot90 ? pagePointSize.height : pagePointSize.width) |
| if (debug) |
| console.log("scaling", pagePointSize, "to fit", root.width, "rotated?", paper.rot90, "scale", root.renderScale) |
| root.contentX = 0 |
| root.contentY = 0 |
| } |
| function scaleToPage(width, height) { |
| var pagePointSize = document.pagePointSize(navigationStack.currentPage) |
| root.renderScale = Math.min( |
| root.width / (paper.rot90 ? pagePointSize.height : pagePointSize.width), |
| root.height / (paper.rot90 ? pagePointSize.width : pagePointSize.height) ) |
| root.contentX = 0 |
| root.contentY = 0 |
| } |
| |
| // text search |
| property alias searchModel: searchModel |
| property alias searchString: searchModel.searchString |
| function searchBack() { --searchModel.currentResult } |
| function searchForward() { ++searchModel.currentResult } |
| |
| // implementation |
| id: root |
| PdfStyle { id: style } |
| contentWidth: paper.width |
| contentHeight: paper.height |
| ScrollBar.vertical: ScrollBar { |
| onActiveChanged: |
| if (!active ) { |
| var currentLocation = Qt.point((root.contentX + root.width / 2) / root.renderScale, |
| (root.contentY + root.height / 2) / root.renderScale) |
| navigationStack.update(navigationStack.currentPage, currentLocation, root.renderScale) |
| } |
| } |
| ScrollBar.horizontal: ScrollBar { |
| onActiveChanged: |
| if (!active ) { |
| var currentLocation = Qt.point((root.contentX + root.width / 2) / root.renderScale, |
| (root.contentY + root.height / 2) / root.renderScale) |
| navigationStack.update(navigationStack.currentPage, currentLocation, root.renderScale) |
| } |
| } |
| |
| onRenderScaleChanged: { |
| image.sourceSize.width = document.pagePointSize(navigationStack.currentPage).width * renderScale |
| image.sourceSize.height = 0 |
| paper.scale = 1 |
| var currentLocation = Qt.point((root.contentX + root.width / 2) / root.renderScale, |
| (root.contentY + root.height / 2) / root.renderScale) |
| navigationStack.update(navigationStack.currentPage, currentLocation, root.renderScale) |
| } |
| |
| PdfSearchModel { |
| id: searchModel |
| document: root.document === undefined ? null : root.document |
| // TODO maybe avoid jumping if the result is already fully visible in the viewport |
| onCurrentResultBoundingRectChanged: root.goToLocation(currentPage, |
| Qt.point(currentResultBoundingRect.x, currentResultBoundingRect.y), 0) |
| } |
| |
| PdfNavigationStack { |
| id: navigationStack |
| onJumped: { |
| root.renderScale = zoom |
| var dx = Math.max(0, location.x * root.renderScale - root.width / 2) - root.contentX |
| var dy = Math.max(0, location.y * root.renderScale - root.height / 2) - root.contentY |
| // don't jump if location is in the viewport already, i.e. if the "error" between desired and actual contentX/Y is small |
| if (Math.abs(dx) > root.width / 3) |
| root.contentX += dx |
| if (Math.abs(dy) > root.height / 3) |
| root.contentY += dy |
| if (root.debug) { |
| console.log("going to zoom", zoom, "loc", location, |
| "on page", page, "ended up @", root.contentX + ", " + root.contentY) |
| } |
| } |
| onCurrentPageChanged: searchModel.currentPage = currentPage |
| } |
| |
| Rectangle { |
| id: paper |
| width: rot90 ? image.height : image.width |
| height: rot90 ? image.width : image.height |
| property real rotationModulus: Math.abs(root.pageRotation % 180) |
| property bool rot90: rotationModulus > 45 && rotationModulus < 135 |
| |
| Image { |
| id: image |
| currentFrame: navigationStack.currentPage |
| source: document.status === PdfDocument.Ready ? document.source : "" |
| asynchronous: true |
| fillMode: Image.PreserveAspectFit |
| rotation: root.pageRotation |
| anchors.centerIn: parent |
| property real pageScale: image.paintedWidth / document.pagePointSize(navigationStack.currentPage).width |
| |
| Shape { |
| anchors.fill: parent |
| visible: image.status === Image.Ready |
| ShapePath { |
| strokeWidth: -1 |
| fillColor: style.pageSearchResultsColor |
| scale: Qt.size(image.pageScale, image.pageScale) |
| PathMultiline { |
| paths: searchModel.currentPageBoundingPolygons |
| } |
| } |
| ShapePath { |
| strokeWidth: style.currentSearchResultStrokeWidth |
| strokeColor: style.currentSearchResultStrokeColor |
| fillColor: "transparent" |
| scale: Qt.size(image.pageScale, image.pageScale) |
| PathMultiline { |
| paths: searchModel.currentResultBoundingPolygons |
| } |
| } |
| ShapePath { |
| fillColor: style.selectionColor |
| scale: Qt.size(image.pageScale, image.pageScale) |
| PathMultiline { |
| paths: selection.geometry |
| } |
| } |
| } |
| |
| Repeater { |
| model: PdfLinkModel { |
| id: linkModel |
| document: root.document |
| page: navigationStack.currentPage |
| } |
| delegate: Shape { |
| x: rect.x * image.pageScale |
| y: rect.y * image.pageScale |
| width: rect.width * image.pageScale |
| height: rect.height * image.pageScale |
| ShapePath { |
| strokeWidth: style.linkUnderscoreStrokeWidth |
| strokeColor: style.linkUnderscoreColor |
| strokeStyle: style.linkUnderscoreStrokeStyle |
| dashPattern: style.linkUnderscoreDashPattern |
| startX: 0; startY: height |
| PathLine { x: width; y: height } |
| } |
| MouseArea { // TODO switch to TapHandler / HoverHandler in 5.15 |
| anchors.fill: parent |
| cursorShape: Qt.PointingHandCursor |
| onClicked: { |
| if (page >= 0) |
| navigationStack.push(page, Qt.point(0, 0), root.renderScale) |
| else |
| Qt.openUrlExternally(url) |
| } |
| } |
| } |
| } |
| DragHandler { |
| id: textSelectionDrag |
| acceptedDevices: PointerDevice.Mouse | PointerDevice.Stylus |
| target: null |
| } |
| TapHandler { |
| id: mouseClickHandler |
| acceptedDevices: PointerDevice.Mouse | PointerDevice.Stylus |
| } |
| TapHandler { |
| id: touchTapHandler |
| acceptedDevices: PointerDevice.TouchScreen |
| onTapped: { |
| selection.clear() |
| selection.focus = true |
| } |
| } |
| } |
| |
| PdfSelection { |
| id: selection |
| anchors.fill: parent |
| document: root.document |
| page: navigationStack.currentPage |
| renderScale: image.pageScale |
| fromPoint: textSelectionDrag.centroid.pressPosition |
| toPoint: textSelectionDrag.centroid.position |
| hold: !textSelectionDrag.active && !mouseClickHandler.pressed |
| focus: true |
| } |
| |
| PinchHandler { |
| id: pinch |
| minimumScale: 0.1 |
| maximumScale: root.renderScale < 4 ? 2 : 1 |
| minimumRotation: 0 |
| maximumRotation: 0 |
| enabled: image.sourceSize.width < 5000 |
| onActiveChanged: |
| if (!active) { |
| var centroidInPoints = Qt.point(pinch.centroid.position.x / root.renderScale, |
| pinch.centroid.position.y / root.renderScale) |
| var centroidInFlickable = root.mapFromItem(paper, pinch.centroid.position.x, pinch.centroid.position.y) |
| var newSourceWidth = image.sourceSize.width * paper.scale |
| var ratio = newSourceWidth / image.sourceSize.width |
| if (root.debug) |
| console.log("pinch ended with centroid", pinch.centroid.position, centroidInPoints, "wrt flickable", centroidInFlickable, |
| "page at", paper.x.toFixed(2), paper.y.toFixed(2), |
| "contentX/Y were", root.contentX.toFixed(2), root.contentY.toFixed(2)) |
| if (ratio > 1.1 || ratio < 0.9) { |
| var centroidOnPage = Qt.point(centroidInPoints.x * root.renderScale * ratio, centroidInPoints.y * root.renderScale * ratio) |
| paper.scale = 1 |
| paper.x = 0 |
| paper.y = 0 |
| root.contentX = centroidOnPage.x - centroidInFlickable.x |
| root.contentY = centroidOnPage.y - centroidInFlickable.y |
| root.renderScale *= ratio // onRenderScaleChanged calls navigationStack.update() so we don't need to here |
| if (root.debug) |
| console.log("contentX/Y adjusted to", root.contentX.toFixed(2), root.contentY.toFixed(2)) |
| } else { |
| paper.x = 0 |
| paper.y = 0 |
| } |
| } |
| grabPermissions: PointerHandler.CanTakeOverFromAnything |
| } |
| } |
| } |
