223 lines
8.5 KiB
C++
223 lines
8.5 KiB
C++
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////////////////////////////////////////////////////////////
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//
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// SFML - Simple and Fast Multimedia Library
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// Copyright (C) 2007-2018 Laurent Gomila (laurent@sfml-dev.org)
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//
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// This software is provided 'as-is', without any express or implied warranty.
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// In no event will the authors be held liable for any damages arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it freely,
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// subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented;
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// you must not claim that you wrote the original software.
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// If you use this software in a product, an acknowledgment
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// in the product documentation would be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such,
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// and must not be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source distribution.
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//
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////////////////////////////////////////////////////////////
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#ifndef SFML_CURSOR_HPP
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#define SFML_CURSOR_HPP
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////////////////////////////////////////////////////////////
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// Headers
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////////////////////////////////////////////////////////////
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#include <SFML/Window/Export.hpp>
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#include <SFML/System/NonCopyable.hpp>
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#include <SFML/System/Vector2.hpp>
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namespace sf
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{
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namespace priv
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{
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class CursorImpl;
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}
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////////////////////////////////////////////////////////////
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/// \brief Cursor defines the appearance of a system cursor
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///
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////////////////////////////////////////////////////////////
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class SFML_WINDOW_API Cursor : NonCopyable
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{
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public:
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////////////////////////////////////////////////////////////
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/// \brief Enumeration of the native system cursor types
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///
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/// Refer to the following table to determine which cursor
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/// is available on which platform.
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///
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/// Type | Linux | Mac OS X | Windows |
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/// ------------------------------------|:-----:|:--------:|:--------:|
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/// sf::Cursor::Arrow | yes | yes | yes |
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/// sf::Cursor::ArrowWait | no | no | yes |
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/// sf::Cursor::Wait | yes | no | yes |
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/// sf::Cursor::Text | yes | yes | yes |
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/// sf::Cursor::Hand | yes | yes | yes |
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/// sf::Cursor::SizeHorizontal | yes | yes | yes |
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/// sf::Cursor::SizeVertical | yes | yes | yes |
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/// sf::Cursor::SizeTopLeftBottomRight | no | yes* | yes |
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/// sf::Cursor::SizeBottomLeftTopRight | no | yes* | yes |
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/// sf::Cursor::SizeAll | yes | no | yes |
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/// sf::Cursor::Cross | yes | yes | yes |
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/// sf::Cursor::Help | yes | yes* | yes |
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/// sf::Cursor::NotAllowed | yes | yes | yes |
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///
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/// * These cursor types are undocumented so may not
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/// be available on all versions, but have been tested on 10.13
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///
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////////////////////////////////////////////////////////////
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enum Type
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{
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Arrow, ///< Arrow cursor (default)
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ArrowWait, ///< Busy arrow cursor
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Wait, ///< Busy cursor
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Text, ///< I-beam, cursor when hovering over a field allowing text entry
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Hand, ///< Pointing hand cursor
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SizeHorizontal, ///< Horizontal double arrow cursor
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SizeVertical, ///< Vertical double arrow cursor
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SizeTopLeftBottomRight, ///< Double arrow cursor going from top-left to bottom-right
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SizeBottomLeftTopRight, ///< Double arrow cursor going from bottom-left to top-right
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SizeAll, ///< Combination of SizeHorizontal and SizeVertical
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Cross, ///< Crosshair cursor
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Help, ///< Help cursor
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NotAllowed ///< Action not allowed cursor
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};
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public:
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////////////////////////////////////////////////////////////
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/// \brief Default constructor
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///
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/// This constructor doesn't actually create the cursor;
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/// initially the new instance is invalid and must not be
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/// used until either loadFromPixels() or loadFromSystem()
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/// is called and successfully created a cursor.
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///
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////////////////////////////////////////////////////////////
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Cursor();
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////////////////////////////////////////////////////////////
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/// \brief Destructor
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///
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/// This destructor releases the system resources
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/// associated with this cursor, if any.
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///
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////////////////////////////////////////////////////////////
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~Cursor();
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////////////////////////////////////////////////////////////
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/// \brief Create a cursor with the provided image
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///
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/// \a pixels must be an array of \a width by \a height pixels
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/// in 32-bit RGBA format. If not, this will cause undefined behavior.
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///
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/// If \a pixels is null or either \a width or \a height are 0,
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/// the current cursor is left unchanged and the function will
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/// return false.
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///
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/// In addition to specifying the pixel data, you can also
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/// specify the location of the hotspot of the cursor. The
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/// hotspot is the pixel coordinate within the cursor image
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/// which will be located exactly where the mouse pointer
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/// position is. Any mouse actions that are performed will
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/// return the window/screen location of the hotspot.
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///
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/// \warning On Unix, the pixels are mapped into a monochrome
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/// bitmap: pixels with an alpha channel to 0 are
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/// transparent, black if the RGB channel are close
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/// to zero, and white otherwise.
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///
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/// \param pixels Array of pixels of the image
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/// \param size Width and height of the image
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/// \param hotspot (x,y) location of the hotspot
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/// \return true if the cursor was successfully loaded;
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/// false otherwise
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///
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////////////////////////////////////////////////////////////
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bool loadFromPixels(const Uint8* pixels, Vector2u size, Vector2u hotspot);
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////////////////////////////////////////////////////////////
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/// \brief Create a native system cursor
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///
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/// Refer to the list of cursor available on each system
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/// (see sf::Cursor::Type) to know whether a given cursor is
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/// expected to load successfully or is not supported by
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/// the operating system.
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///
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/// \param type Native system cursor type
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/// \return true if and only if the corresponding cursor is
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/// natively supported by the operating system;
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/// false otherwise
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///
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////////////////////////////////////////////////////////////
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bool loadFromSystem(Type type);
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private:
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friend class Window;
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////////////////////////////////////////////////////////////
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/// \brief Get access to the underlying implementation
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///
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/// This is primarily designed for sf::Window::setMouseCursor,
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/// hence the friendship.
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///
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/// \return a reference to the OS-specific implementation
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///
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////////////////////////////////////////////////////////////
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const priv::CursorImpl& getImpl() const;
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private:
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////////////////////////////////////////////////////////////
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// Member data
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////////////////////////////////////////////////////////////
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priv::CursorImpl* m_impl; ///< Platform-specific implementation of the cursor
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};
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} // namespace sf
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#endif // SFML_CURSOR_HPP
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////////////////////////////////////////////////////////////
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/// \class sf::Cursor
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/// \ingroup window
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///
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/// \warning Features related to Cursor are not supported on
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/// iOS and Android.
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///
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/// This class abstracts the operating system resources
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/// associated with either a native system cursor or a custom
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/// cursor.
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///
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/// After loading the cursor the graphical appearance
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/// with either loadFromPixels() or loadFromSystem(), the
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/// cursor can be changed with sf::Window::setMouseCursor().
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///
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/// The behaviour is undefined if the cursor is destroyed while
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/// in use by the window.
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///
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/// Usage example:
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/// \code
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/// sf::Window window;
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///
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/// // ... create window as usual ...
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///
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/// sf::Cursor cursor;
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/// if (cursor.loadFromSystem(sf::Cursor::Hand))
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/// window.setMouseCursor(cursor);
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/// \endcode
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///
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/// \see sf::Window::setMouseCursor
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///
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////////////////////////////////////////////////////////////
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