mirror of
https://github.com/JakubMelka/PDF4QT.git
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199 lines
8.1 KiB
C++
199 lines
8.1 KiB
C++
// MIT License
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//
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// Copyright (c) 2018-2025 Jakub Melka and Contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#ifndef PDFWIDGETFORMMANAGER_H
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#define PDFWIDGETFORMMANAGER_H
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#include "pdfwidgetsglobal.h"
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#include "pdfform.h"
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#include "pdfdocumentdrawinterface.h"
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namespace pdf
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{
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class PDFDrawWidgetProxy;
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class PDFWidgetAnnotationManager;
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class PDFWidgetFormManager;
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/// Base class for editors of form fields. It enables editation
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/// of form fields, such as entering text, clicking on check box etc.
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class PDF4QTLIBWIDGETSSHARED_EXPORT PDFFormFieldWidgetEditor
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{
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public:
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explicit PDFFormFieldWidgetEditor(PDFWidgetFormManager* formManager, PDFFormWidget formWidget);
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virtual ~PDFFormFieldWidgetEditor() = default;
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virtual void shortcutOverrideEvent(QWidget* widget, QKeyEvent* event);
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virtual void keyPressEvent(QWidget* widget, QKeyEvent* event);
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virtual void keyReleaseEvent(QWidget* widget, QKeyEvent* event);
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virtual void mousePressEvent(QWidget* widget, QMouseEvent* event, const QPointF& mousePagePosition);
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virtual void mouseDoubleClickEvent(QWidget* widget, QMouseEvent* event, const QPointF& mousePagePosition);
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virtual void mouseReleaseEvent(QWidget* widget, QMouseEvent* event, const QPointF& mousePagePosition);
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virtual void mouseMoveEvent(QWidget* widget, QMouseEvent* event, const QPointF& mousePagePosition);
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virtual void wheelEvent(QWidget* widget, QWheelEvent* event, const QPointF& mousePagePosition);
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virtual void reloadValue() { }
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virtual bool isEditorDrawEnabled() const { return false; }
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virtual QRectF getActiveEditorRectangle() const { return QRectF(); }
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const PDFFormWidget* getFormWidget() const { return &m_formWidget; }
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PDFFormField* getFormField() const { return m_formWidget.getParent(); }
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PDFObjectReference getWidgetAnnotation() const { return m_formWidget.getWidget(); }
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void setFocus(bool hasFocus);
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/// Draw form field widget using given parameters. It is used, when
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/// we want to draw editor contents on the painter using parameters.
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/// Parameter \p edit decides, if editor is drawn, or static contents
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/// based on field value is drawn.
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/// \param parameters Parameters
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/// \param edit Draw editor or static contents
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virtual void draw(AnnotationDrawParameters& parameters, bool edit) const;
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protected:
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/// This function is called every time, the focus state changes
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/// \param focused If editor was focused, or not
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virtual void setFocusImpl(bool focused) { Q_UNUSED(focused); }
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void performKeypadNavigation(QWidget* widget, QKeyEvent* event);
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PDFWidgetFormManager* m_formManager;
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PDFFormWidget m_formWidget;
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bool m_hasFocus;
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};
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class PDF4QTLIBWIDGETSSHARED_EXPORT PDFWidgetFormManager : public PDFFormManager, public IDrawWidgetInputInterface
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{
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Q_OBJECT
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private:
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using BaseClass = PDFFormManager;
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public:
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explicit PDFWidgetFormManager(PDFDrawWidgetProxy* proxy, QObject* parent);
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virtual ~PDFWidgetFormManager() override;
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// interface IDrawWidgetInputInterface
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virtual void shortcutOverrideEvent(QWidget* widget, QKeyEvent* event) override;
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virtual void keyPressEvent(QWidget* widget, QKeyEvent* event) override;
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virtual void keyReleaseEvent(QWidget* widget, QKeyEvent* event) override;
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virtual void mousePressEvent(QWidget* widget, QMouseEvent* event) override;
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virtual void mouseDoubleClickEvent(QWidget* widget, QMouseEvent* event) override;
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virtual void mouseReleaseEvent(QWidget* widget, QMouseEvent* event) override;
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virtual void mouseMoveEvent(QWidget* widget, QMouseEvent* event) override;
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virtual void wheelEvent(QWidget* widget, QWheelEvent* event) override;
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virtual int getInputPriority() const override;
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virtual QString getTooltip() const override;
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virtual const std::optional<QCursor>& getCursor() const override;
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/// Tries to set focus on next/previous form field in the focus chain.
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/// Function returns true, if focus has been successfully set.
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/// \param next Focus next (true) or previous (false) widget
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bool focusNextPrevFormField(bool next);
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/// Sets focus to the editor. Is is allowed to pass nullptr to this
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/// function, it means that no editor is focused.
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/// \param editor Editor to be focused
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void setFocusToEditor(PDFFormFieldWidgetEditor* editor);
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/// Returns true, if widget is focused.
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/// \param widget Widget annotation reference
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virtual bool isFocused(PDFObjectReference widget) const override;
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/// Returns editor for form field
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PDFFormFieldWidgetEditor* getEditor(const PDFFormField* formField) const;
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struct MouseEventInfo
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{
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/// Form field under mouse event, nullptr, if
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/// no form field is under mouse button.
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PDFFormField* formField = nullptr;
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/// Form field widget editor, which is associated
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/// with given form field.
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PDFFormFieldWidgetEditor* editor = nullptr;
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/// Mouse position in form field coordinate space
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QPointF mousePosition;
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/// Matrix, which maps from device space to widget space
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QTransform deviceToWidget;
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/// Returns true, if mouse event info is valid, i.e.
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/// mouse event occurs above some form field.
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bool isValid() const { return editor != nullptr; }
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};
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virtual bool isEditorDrawEnabled(const PDFObjectReference& reference) const override;
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virtual bool isEditorDrawEnabled(const PDFFormField* formField) const override;
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virtual void drawFormField(const PDFFormField* formField, AnnotationDrawParameters& parameters, bool edit) const override;
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PDFWidgetAnnotationManager* getAnnotationManager() const;
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void setAnnotationManager(PDFWidgetAnnotationManager* annotationManager);
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PDFDrawWidgetProxy* getProxy() const { return m_proxy; }
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protected:
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virtual void updateFieldValues() override;
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virtual void onDocumentReset() override;
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private:
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void updateFormWidgetEditors();
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/// Releases all form widget editors
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void clearEditors();
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MouseEventInfo getMouseEventInfo(QWidget* widget, QPoint point);
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struct MouseGrabInfo
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{
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MouseEventInfo info;
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int mouseGrabNesting = 0;
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bool isMouseGrabbed() const { return mouseGrabNesting > 0; }
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};
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bool isMouseGrabbed() const { return m_mouseGrabInfo.isMouseGrabbed(); }
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/// Grabs mouse input, if mouse is already grabbed, or if event
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/// is accepted. When mouse is grabbed, then mouse input events
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/// are sent to active editor and are automatically accepted.
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/// \param info Mouse event info
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/// \param event Mouse event
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void grabMouse(const MouseEventInfo& info, QMouseEvent* event);
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/// Release mouse input
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/// \param info Mouse event info
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/// \param event Mouse event
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void ungrabMouse(const MouseEventInfo& info, QMouseEvent* event);
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PDFWidgetAnnotationManager* m_annotationManager;
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PDFDrawWidgetProxy* m_proxy;
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MouseGrabInfo m_mouseGrabInfo;
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std::optional<QCursor> m_mouseCursor;
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std::vector<PDFFormFieldWidgetEditor*> m_widgetEditors;
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PDFFormFieldWidgetEditor* m_focusedEditor;
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};
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} // namespace pdf
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#endif // PDFWIDGETFORMMANAGER_H
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