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Diffstat (limited to 'src/pdf/quick/qml/PdfMultiPageView.qml')
| -rw-r--r-- | src/pdf/quick/qml/PdfMultiPageView.qml | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/src/pdf/quick/qml/PdfMultiPageView.qml b/src/pdf/quick/qml/PdfMultiPageView.qml new file mode 100644 index 000000000..e8eccaf3b --- /dev/null +++ b/src/pdf/quick/qml/PdfMultiPageView.qml @@ -0,0 +1,342 @@ +/**************************************************************************** +** +** 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) + } +} |