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 * This file incorporates work covered by the following license notice:
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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 */

#ifndef INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERHELPVIEW_HXX
#define INCLUDED_SDEXT_SOURCE_PRESENTER_PRESENTERHELPVIEW_HXX

#include "PresenterController.hxx"
#include <cppuhelper/basemutex.hxx>
#include <cppuhelper/compbase.hxx>
#include <com/sun/star/awt/XPaintListener.hpp>
#include <com/sun/star/awt/XWindowListener.hpp>
#include <com/sun/star/drawing/framework/XView.hpp>
#include <com/sun/star/drawing/framework/XResourceId.hpp>
#include <com/sun/star/frame/XController.hpp>
#include <com/sun/star/rendering/XSpriteCanvas.hpp>
#include <memory>

namespace sdext { namespace presenter {

class PresenterButton;

typedef cppu::WeakComponentImplHelper<
    css::drawing::framework::XView,
    css::awt::XWindowListener,
    css::awt::XPaintListener
    > PresenterHelpViewInterfaceBase;

/** Show help text that describes the defined keys.
*/
class PresenterHelpView
    : private ::cppu::BaseMutex,
      public PresenterHelpViewInterfaceBase
{
public:
    explicit PresenterHelpView (
        const css::uno::Reference<css::uno::XComponentContext>& rxContext,
        const css::uno::Reference<css::drawing::framework::XResourceId>& rxViewId,
        const css::uno::Reference<css::frame::XController>& rxController,
        const ::rtl::Reference<PresenterController>& rpPresenterController);
    virtual ~PresenterHelpView() override;

    virtual void SAL_CALL disposing() override;

    // lang::XEventListener

    virtual void SAL_CALL
        disposing (const css::lang::EventObject& rEventObject) override;

    // XWindowListener

    virtual void SAL_CALL windowResized (const css::awt::WindowEvent& rEvent) override;

    virtual void SAL_CALL windowMoved (const css::awt::WindowEvent& rEvent) override;

    virtual void SAL_CALL windowShown (const css::lang::EventObject& rEvent) override;

    virtual void SAL_CALL windowHidden (const css::lang::EventObject& rEvent) override;

    // XPaintListener

    virtual void SAL_CALL windowPaint (const css::awt::PaintEvent& rEvent) override;

    // XResourceId

    virtual css::uno::Reference<css::drawing::framework::XResourceId> SAL_CALL getResourceId() override;

    virtual sal_Bool SAL_CALL isAnchorOnly() override;

private:
    class TextContainer;

    css::uno::Reference<css::uno::XComponentContext> mxComponentContext;
    css::uno::Reference<css::drawing::framework::XResourceId> mxViewId;
    css::uno::Reference<css::drawing::framework::XPane> mxPane;
    css::uno::Reference<css::awt::XWindow> mxWindow;
    css::uno::Reference<css::rendering::XCanvas> mxCanvas;
    ::rtl::Reference<PresenterController> mpPresenterController;
    PresenterTheme::SharedFontDescriptor mpFont;
    std::unique_ptr<TextContainer> mpTextContainer;
    ::rtl::Reference<PresenterButton> mpCloseButton;
    sal_Int32 mnSeparatorY;
    sal_Int32 mnMaximalWidth;

    void ProvideCanvas();
    void Resize();
    void Paint (const css::awt::Rectangle& rRedrawArea);
    void ReadHelpStrings();
    void ProcessString (
        const css::uno::Reference<css::beans::XPropertySet>& rsProperties);

    /** Find a font size, so that all text can be displayed at the same
        time.
    */
    void CheckFontSize();

    /** @throws css::lang::DisposedException when the object has already been
        disposed.
    */
    void ThrowIfDisposed();
};

} } // end of namespace ::sdext::presenter

#endif

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