Ejemplo de visor multipágina PDF
Un visor de PDF de Qt Quick que permite desplazarse por las páginas.
PDF Multipage Viewer demuestra cómo utilizar el componente PdfMultiPageView para representar documentos PDF y buscar texto en ellos.
Ejecución del ejemplo
Para ejecutar el ejemplo desde Qt Creatorabra el modo Welcome y seleccione el ejemplo de Examples. Para más información, consulte Qt Creator: Tutorial: Construir y ejecutar.
Creación de la ventana principal
Instancie un ApplicationWindow, vincule su título al título del documento PDF y cree una barra de herramientas:
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
La barra de herramientas tiene botones para la mayoría de las acciones comunes:
ToolButton { action: Action { shortcut: StandardKey.Open icon.source: "qrc:/qt/qml/MultiPageModule/resources/document-open.svg" onTriggered: fileDialog.open() } } ToolButton { action: Action { shortcut: StandardKey.ZoomIn enabled: view.renderScale < 10 icon.source: "qrc:/qt/qml/MultiPageModule/resources/zoom-in.svg" onTriggered: view.renderScale *= Math.sqrt(2) } } ToolButton { action: Action { shortcut: StandardKey.ZoomOut
Declare un PdfDocument y vincule la propiedad status y la señal passwordRequired para informar al usuario cuando se produzca un error o se necesite una contraseña:
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() }
Añade el componente principal, PdfMultiPageView:
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() } }
Un Drawer contiene un ListView para mostrar los resultados de la búsqueda del searchModel:
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 { Layout.preferredWidth: parent.width selectByMouse: true readOnly: true wrapMode: Text.WordWrap } ColumnLayout { spacing: 6 Layout.preferredWidth: 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 } Item { id: filler; Layout.fillHeight: true } Label { Layout.alignment: Qt.AlignBottom font.bold: true textFormat: Text.StyledText text: qsTr("<a href='https://doc.qt.io/qt-6/qtpdf-multipage-example.html'>PdfMultiPageView example</a><br/>\n" + "Qt version %1").arg(Application.version) onLinkActivated: (link) => Qt.openUrlExternally(link) } } 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 Layout.preferredWidth: 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 { id: del 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: del.index asynchronous: true fillMode: Image.PreserveAspectFit property bool landscape: del.pointSize.width > del.pointSize.height width: landscape ? thumbnailsView.cellWidth - 6 : height * del.pointSize.width / del.pointSize.height height: landscape ? width * del.pointSize.height / del.pointSize.width : thumbnailsView.cellHeight - 14 sourceSize.width: width sourceSize.height: height } } Text { id: pageNumber anchors.bottom: parent.bottom anchors.horizontalCenter: parent.horizontalCenter text: del.label } TapHandler { onTapped: view.goToPage(del.index) } } } } } }
Por último, añada una segunda barra de herramientas como pie de página, para alojar el campo de búsqueda, los botones de búsqueda arriba/abajo y alguna información de estado:
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:/qt/qml/MultiPageModule/resources/sidebar-collapse-left.svg" : "qrc:/qt/qml/MultiPageModule/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:/qt/qml/MultiPageModule/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:/qt/qml/MultiPageModule/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:/qt/qml/MultiPageModule/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 } } } }
Archivos y Atribuciones
Ver también PDF Single Page Viewer Example.
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