PDF Multipage Viewer Beispiel
Ein Qt Quick PDF-Viewer, der das Blättern durch die Seiten ermöglicht.
PDF Multipage Viewer demonstriert die Verwendung der Komponente PdfMultiPageView, um PDF-Dokumente zu rendern und darin nach Text zu suchen.
Ausführen des Beispiels
Um das Beispiel auszuführen Qt Creatorauszuführen, öffnen Sie den Modus Welcome und wählen Sie das Beispiel aus Examples. Weitere Informationen finden Sie unter Erstellen und Ausführen eines Beispiels.
Erstellen des Hauptfensters
Instanzieren Sie ein ApplicationWindow, binden Sie dessen Titel an den Titel des PDF-Dokuments und erstellen Sie eine Symbolleiste:
ApplicationWindow { id: root width: 800 height: 1024 color: "lightgrey" title: doc.title visible: true property string source // for main.cpp header: ToolBar { RowLayout { anchors.fill: parent anchors.rightMargin: 6
Die Symbolleiste enthält Schaltflächen für die meisten der üblichen Aktionen:
ToolButton { action: Action { shortcut: StandardKey.Open icon.source: "qrc:/multipage/resources/document-open.svg" onTriggered: fileDialog.open() } } ToolButton { action: Action { shortcut: StandardKey.ZoomIn enabled: view.renderScale < 10 icon.source: "qrc:/multipage/resources/zoom-in.svg" onTriggered: view.renderScale *= Math.sqrt(2) } } ToolButton { action: Action { shortcut: StandardKey.ZoomOut
Deklarieren Sie ein PdfDocument und binden Sie die Eigenschaft status und das Signal passwordRequired, um den Benutzer zu informieren, wenn ein Fehler auftritt oder ein Passwort erforderlich ist:
Dialog { id: passwordDialog title: "Password" standardButtons: Dialog.Ok | Dialog.Cancel modal: true closePolicy: Popup.CloseOnEscape anchors.centerIn: parent width: 300 contentItem: TextField { id: passwordField placeholderText: qsTr("Please provide the password") echoMode: TextInput.Password width: parent.width onAccepted: passwordDialog.accept() } onOpened: passwordField.forceActiveFocus() onAccepted: doc.password = passwordField.text } Dialog { id: errorDialog title: "Error loading " + doc.source standardButtons: Dialog.Close modal: true closePolicy: Popup.CloseOnEscape anchors.centerIn: parent width: 300 visible: doc.status === PdfDocument.Error contentItem: Label { id: errorField text: doc.error } } PdfDocument { id: doc source: Qt.resolvedUrl(root.source) onPasswordRequired: passwordDialog.open() }
Fügen Sie die Hauptkomponente PdfMultiPageView hinzu:
PdfMultiPageView { id: view anchors.fill: parent anchors.leftMargin: sidebar.position * sidebar.width document: doc searchString: searchField.text onCurrentPageChanged: currentPageSB.value = view.currentPage + 1 } DropArea { anchors.fill: parent keys: ["text/uri-list"] onEntered: (drag) => { drag.accepted = (drag.proposedAction === Qt.MoveAction || drag.proposedAction === Qt.CopyAction) && drag.hasUrls && drag.urls[0].endsWith("pdf") } onDropped: (drop) => { doc.source = drop.urls[0] drop.acceptProposedAction() } }
Ein Drawer enthält ein ListView, um die Suchergebnisse von searchModel anzuzeigen:
Drawer { id: sidebar edge: Qt.LeftEdge modal: false width: 300 y: root.header.height height: view.height dim: false clip: true TabBar { id: sidebarTabs x: -width rotation: -90 transformOrigin: Item.TopRight currentIndex: 2 // bookmarks by default TabButton { text: qsTr("Info") } TabButton { text: qsTr("Search Results") } TabButton { text: qsTr("Bookmarks") } TabButton { text: qsTr("Pages") } } GroupBox { anchors.fill: parent anchors.leftMargin: sidebarTabs.height StackLayout { anchors.fill: parent currentIndex: sidebarTabs.currentIndex component InfoField: TextInput { width: parent.width selectByMouse: true readOnly: true wrapMode: Text.WordWrap } Column { spacing: 6 width: parent.width - 6 Label { font.bold: true; text: qsTr("Title") } InfoField { text: doc.title } Label { font.bold: true; text: qsTr("Author") } InfoField { text: doc.author } Label { font.bold: true; text: qsTr("Subject") } InfoField { text: doc.subject } Label { font.bold: true; text: qsTr("Keywords") } InfoField { text: doc.keywords } Label { font.bold: true; text: qsTr("Producer") } InfoField { text: doc.producer } Label { font.bold: true; text: qsTr("Creator") } InfoField { text: doc.creator } Label { font.bold: true; text: qsTr("Creation date") } InfoField { text: doc.creationDate } Label { font.bold: true; text: qsTr("Modification date") } InfoField { text: doc.modificationDate } } ListView { id: searchResultsList implicitHeight: parent.height model: view.searchModel currentIndex: view.searchModel.currentResult ScrollBar.vertical: ScrollBar { } delegate: ItemDelegate { id: resultDelegate required property int index required property int page required property string contextBefore required property string contextAfter width: parent ? parent.width : 0 RowLayout { anchors.fill: parent spacing: 0 Label { text: "Page " + (resultDelegate.page + 1) + ": " } Label { text: resultDelegate.contextBefore elide: Text.ElideLeft horizontalAlignment: Text.AlignRight Layout.fillWidth: true Layout.preferredWidth: parent.width / 2 } Label { font.bold: true text: view.searchString width: implicitWidth } Label { text: resultDelegate.contextAfter elide: Text.ElideRight Layout.fillWidth: true Layout.preferredWidth: parent.width / 2 } } highlighted: ListView.isCurrentItem onClicked: view.searchModel.currentResult = resultDelegate.index } } TreeView { id: bookmarksTree implicitHeight: parent.height implicitWidth: parent.width columnWidthProvider: function() { return width } delegate: TreeViewDelegate { required property int page required property point location required property real zoom onClicked: view.goToLocation(page, location, zoom) } model: PdfBookmarkModel { document: doc } ScrollBar.vertical: ScrollBar { } } GridView { id: thumbnailsView implicitWidth: parent.width implicitHeight: parent.height model: doc.pageModel cellWidth: width / 2 cellHeight: cellWidth + 10 delegate: Item { required property int index required property string label required property size pointSize width: thumbnailsView.cellWidth height: thumbnailsView.cellHeight Rectangle { id: paper width: image.width height: image.height x: (parent.width - width) / 2 y: (parent.height - height - pageNumber.height) / 2 PdfPageImage { id: image document: doc currentFrame: index asynchronous: true fillMode: Image.PreserveAspectFit property bool landscape: pointSize.width > pointSize.height width: landscape ? thumbnailsView.cellWidth - 6 : height * pointSize.width / pointSize.height height: landscape ? width * pointSize.height / pointSize.width : thumbnailsView.cellHeight - 14 sourceSize.width: width sourceSize.height: height } } Text { id: pageNumber anchors.bottom: parent.bottom anchors.horizontalCenter: parent.horizontalCenter text: label } TapHandler { onTapped: view.goToPage(index) } } } } } }
Fügen Sie schließlich eine zweite Symbolleiste als Fußzeile hinzu, die das Suchfeld, die Schaltflächen für die Suche nach oben/unten und einige Statusinformationen enthält:
footer: ToolBar { height: footerRow.implicitHeight + 6 RowLayout { id: footerRow anchors.fill: parent ToolButton { action: Action { id: sidebarOpenAction checkable: true checked: sidebar.opened icon.source: checked ? "qrc:/multipage/resources/sidebar-collapse-left.svg" : "qrc:/multipage/resources/sidebar-expand-left.svg" onTriggered: sidebar.open() } ToolTip.visible: enabled && hovered ToolTip.delay: 2000 ToolTip.text: "open sidebar" } ToolButton { action: Action { icon.source: "qrc:/multipage/resources/go-up-search.svg" shortcut: StandardKey.FindPrevious enabled: view.searchModel.count > 0 onTriggered: view.searchBack() } ToolTip.visible: enabled && hovered ToolTip.delay: 2000 ToolTip.text: "find previous" } TextField { id: searchField placeholderText: "search" Layout.minimumWidth: 150 Layout.fillWidth: true Layout.bottomMargin: 3 onAccepted: { sidebar.open() sidebarTabs.setCurrentIndex(1) } Image { visible: searchField.text !== "" source: "qrc:/multipage/resources/edit-clear.svg" sourceSize.height: searchField.height - 6 anchors { right: parent.right verticalCenter: parent.verticalCenter margins: 3 } TapHandler { onTapped: searchField.clear() } } } ToolButton { action: Action { icon.source: "qrc:/multipage/resources/go-down-search.svg" shortcut: StandardKey.FindNext enabled: view.searchModel.count > 0 onTriggered: view.searchForward() } ToolTip.visible: enabled && hovered ToolTip.delay: 2000 ToolTip.text: "find next" } Label { id: statusLabel property size implicitPointSize: doc.pagePointSize(view.currentPage) text: "page " + (currentPageSB.value) + " of " + doc.pageCount + " scale " + view.renderScale.toFixed(2) + " original " + implicitPointSize.width.toFixed(1) + "x" + implicitPointSize.height.toFixed(1) + " pt" visible: doc.pageCount > 0 } } } }
Dateien und Attributionen
Siehe auch PDF Single Page Viewer Beispiel.
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