backend.hpp
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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
#ifndef OPENCV_HIGHGUI_BACKEND_HPP
#define OPENCV_HIGHGUI_BACKEND_HPP
#include <memory>
#include <map>
namespace cv { namespace highgui_backend {
class CV_EXPORTS UIWindowBase
{
public:
typedef std::shared_ptr<UIWindowBase> Ptr;
typedef std::weak_ptr<UIWindowBase> WeakPtr;
virtual ~UIWindowBase();
virtual const std::string& getID() const = 0; // internal name, used for logging
virtual bool isActive() const = 0;
virtual void destroy() = 0;
}; // UIWindowBase
class UITrackbar;
class CV_EXPORTS UIWindow : public UIWindowBase
{
public:
virtual ~UIWindow();
virtual void imshow(InputArray image) = 0;
virtual double getProperty(int prop) const = 0;
virtual bool setProperty(int prop, double value) = 0;
virtual void resize(int width, int height) = 0;
virtual void move(int x, int y) = 0;
virtual Rect getImageRect() const = 0;
virtual void setTitle(const std::string& title) = 0;
virtual void setMouseCallback(MouseCallback onMouse, void* userdata /*= 0*/) = 0;
//TODO: handle both keys and mouse events (both with mouse coordinates)
//virtual void setInputCallback(InputCallback onInputEvent, void* userdata /*= 0*/) = 0;
virtual std::shared_ptr<UITrackbar> createTrackbar(
const std::string& name,
int count,
TrackbarCallback onChange /*= 0*/,
void* userdata /*= 0*/
) = 0;
virtual std::shared_ptr<UITrackbar> findTrackbar(const std::string& name) = 0;
#if 0 // QT only
virtual void displayOverlay(const std::string& text, int delayms = 0) = 0;
virtual void displayStatusBar(const std::string& text, int delayms /*= 0*/) = 0;
virtual int createButton(
const std::string& bar_name, ButtonCallback on_change,
void* userdata = 0, int type /*= QT_PUSH_BUTTON*/,
bool initial_button_state /*= false*/
) = 0;
// addText, QtFont stuff
#endif
#if 0 // OpenGL
virtual void imshow(const ogl::Texture2D& tex) = 0;
virtual void setOpenGlDrawCallback(OpenGlDrawCallback onOpenGlDraw, void* userdata = 0) = 0;
virtual void setOpenGlContext() = 0;
virtual void updateWindow() = 0;
#endif
}; // UIWindow
class CV_EXPORTS UITrackbar : public UIWindowBase
{
public:
virtual ~UITrackbar();
virtual int getPos() const = 0;
virtual void setPos(int pos) = 0;
virtual cv::Range getRange() const = 0;
virtual void setRange(const cv::Range& range) = 0;
}; // UITrackbar
class CV_EXPORTS UIBackend
{
public:
virtual ~UIBackend();
virtual void destroyAllWindows() = 0;
// namedWindow
virtual std::shared_ptr<UIWindow> createWindow(
const std::string& winname,
int flags
) = 0;
virtual int waitKeyEx(int delay /*= 0*/) = 0;
virtual int pollKey() = 0;
};
std::shared_ptr<UIBackend>& getCurrentUIBackend();
void setUIBackend(const std::shared_ptr<UIBackend>& api);
bool setUIBackend(const std::string& backendName);
#ifndef BUILD_PLUGIN
#ifdef HAVE_WIN32UI
std::shared_ptr<UIBackend> createUIBackendWin32UI();
#endif
#ifdef HAVE_GTK
std::shared_ptr<UIBackend> createUIBackendGTK();
#endif
#if 0 // TODO: defined HAVE_QT
std::shared_ptr<UIBackend> createUIBackendQT();
#endif
#endif // BUILD_PLUGIN
} // namespace highgui_backend
} // namespace cv
#endif // OPENCV_HIGHGUI_BACKEND_HPP