
/*
 * CINELERRA
 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 */

#ifndef CANVAS_H
#define CANVAS_H

#include "edl.inc"
#include "guicast.h"
#include "mwindow.inc"

// Output for all X11 video

class CanvasOutput;
class CanvasFullScreen;
class CanvasXScroll;
class CanvasYScroll;
class CanvasPopup;
class CanvasFullScreenPopup;
class CanvasToggleControls;

// The EDL arguments can be set to 0 if the canvas_w and canvas_h are used
class Canvas
{
public:
	Canvas(MWindow *mwindow,
		BC_WindowBase *subwindow, 
		int x, 
		int y, 
		int w, 
		int h,
		int output_w,
		int output_h,
		int use_scrollbars,
		int use_cwindow = 0,
		int use_rwindow = 0,
		int use_vwindow = 0); // Use menu different options for different windows
	virtual ~Canvas();

	void reset();
// Get dimensions given a zoom
	void calculate_sizes(float aspect_ratio, 
		int output_w, 
		int output_h, 
		float zoom, 
		int &w, 
		int &h);
// Lock access to the canvas pointer.
// Must be called before get_canvas or locking the canvas.
	void lock_canvas(const char *location);
	void unlock_canvas();
	int is_locked();

	void create_objects(EDL *edl);
	void set_cursor(int cursor);
// Start video playback
	void start_video();
	void stop_video();

// Start single frame processing.  Causes the status indicator to update
	void start_single();
	void stop_single();

	void start_fullscreen();
	void stop_fullscreen();

// Don't call from inside the canvas
	void create_canvas(int flush);



// Processing or video playback changed.
	virtual void status_event() {};


	virtual void reset_camera() {};
	virtual void reset_projector() {};
	virtual void zoom_resize_window(float percentage) {};
	virtual void zoom_auto() {};
	virtual int cursor_leave_event() { return 0; };
	virtual int cursor_enter_event() { return 0; };
	virtual int button_release_event() { return 0; };
	virtual int button_press_event();
	virtual int cursor_motion_event() { return 0; };
	virtual void draw_overlays() { };
	virtual void toggle_controls() { } ;
	virtual int get_cwindow_controls() { return 0; };
	virtual int get_fullscreen() { return 0; }
	virtual void set_fullscreen(int value) { };

	int cursor_leave_event_base(BC_WindowBase *caller);
	int cursor_enter_event_base(BC_WindowBase *caller);
	int button_press_event_base(BC_WindowBase *caller);
	int keypress_event(BC_WindowBase *caller);



// Provide canvas dimensions since a BC_Bitmap containing obsolete dimensions
// is often the output being transferred to.
// This gets the input coordinates on the device output_frame
// and the corresponding output coordinates on the canvas.
// Must be floating point to support OpenGL.
	void get_transfers(EDL *edl, 
		float &output_x1, 
		float &output_y1, 
		float &output_x2, 
		float &output_y2,
		float &canvas_x1, 
		float &canvas_y1, 
		float &canvas_x2, 
		float &canvas_y2,
// passing -1 causes automatic size detection
		int canvas_w = -1,
		int canvas_h = -1);
	void reposition_window(EDL *edl, int x, int y, int w, int h);
	virtual void reset_translation() {};
	virtual void close_source() {};
// Updates the stores
	virtual void update_zoom(int x, int y, float zoom) {};
	void check_boundaries(EDL *edl, int &x, int &y, float &zoom);
	void update_scrollbars(int flush);
// Get scrollbar positions relative to output.
// No correction is done if output is smaller than canvas
	virtual int get_xscroll() { return 0; };
	virtual int get_yscroll() { return 0; };
	virtual float get_zoom() { return 0; };
// Redraws the image
	virtual void draw_refresh(int flush);

// Get top left offset of canvas relative to output.
// Normally negative.  Can be positive if output is smaller than canvas.
	float get_x_offset(EDL *edl, 
		int single_channel, 
		float zoom_x, 
		float conformed_w,
		float conformed_h);
	float get_y_offset(EDL *edl, 
		int single_channel, 
		float zoom_y, 
		float conformed_w,
		float conformed_h);
	void get_zooms(EDL *edl, 
		int single_channel, 
		float &zoom_x, 
		float &zoom_y,
		float &conformed_w,
		float &conformed_h);
	
	
// Convert coord from output to canvas position, including
// x and y scroll offsets
	void output_to_canvas(EDL *edl, int single_channel, float &x, float &y);
// Convert coord from canvas to output position
	void canvas_to_output(EDL *edl, int single_channel, float &x, float &y);

// Get dimensions of frame being sent to canvas
	virtual int get_output_w(EDL *edl);
	virtual int get_output_h(EDL *edl);
// Get if scrollbars exist
	int scrollbars_exist();
// Get cursor locations relative to canvas and not offset by scrollbars
	int get_cursor_x();
	int get_cursor_y();
	int get_buttonpress();
// Gets whatever video surface is enabled
	BC_WindowBase* get_canvas();

// The owner of the canvas
	BC_WindowBase *subwindow;
// Video surface if a subwindow
	CanvasOutput *canvas_subwindow;
// Video surface if fullscreen
	CanvasFullScreen *canvas_fullscreen;
	CanvasXScroll *xscroll;
	CanvasYScroll *yscroll;
	CanvasPopup *canvas_menu;
	CanvasFullScreenPopup *fullscreen_menu;
	int x, y, w, h;
	int use_scrollbars;
	int use_cwindow;
	int use_rwindow;
	int use_vwindow;
// Used in record monitor
	int output_w, output_h;
// Last frame played is stored here in driver format for 
// refreshes.
	VFrame *refresh_frame;
// Results from last get_scrollbars
	int w_needed;
	int h_needed;
	int w_visible;
	int h_visible;
// For cases where video is not enabled on the canvas but processing is 
// occurring for a single frame, this causes the status to update.
	int is_processing;
// Cursor is inside video surface
	int cursor_inside;
	int view_x;
	int view_y;
	int view_w;
	int view_h;
	int root_w;
	int root_h;

	MWindow *mwindow;

private:
	void get_scrollbars(EDL *edl, 
		int &canvas_x, 
		int &canvas_y, 
		int &canvas_w, 
		int &canvas_h);
	Mutex *canvas_lock;
};


class CanvasOutput : public BC_SubWindow
{
public:
	CanvasOutput(Canvas *canvas,
        int x,
        int y,
        int w,
        int h);
	~CanvasOutput();

	int cursor_leave_event();
	int cursor_enter_event();
	int button_press_event();
	int button_release_event();
	int cursor_motion_event();
	int keypress_event();

	Canvas *canvas;
};




class CanvasFullScreen : public BC_FullScreen
{
public:
	CanvasFullScreen(Canvas *canvas,
        int w,
        int h);
	~CanvasFullScreen();

	Canvas *canvas;
};




class CanvasXScroll : public BC_ScrollBar
{
public:
	CanvasXScroll(EDL *edl, 
		Canvas *canvas, 
		int x, 
		int y, 
		int length, 
		int position, 
		int handle_length, 
		int pixels);
	~CanvasXScroll();

	int handle_event();
	Canvas *canvas;
	EDL *edl;
};

class CanvasYScroll : public BC_ScrollBar
{
public:
	CanvasYScroll(EDL *edl, 
		Canvas *canvas, 
		int x, 
		int y, 
		int length, 
		int position, 
		int handle_length, 
		int pixels);
	~CanvasYScroll();

	int handle_event();

	Canvas *canvas;
	EDL *edl;
};

class CanvasFullScreenPopup : public BC_PopupMenu
{
public:
	CanvasFullScreenPopup(Canvas *canvas);

	void create_objects();

	Canvas *canvas;
};

class CanvasSubWindowItem : public BC_MenuItem
{
public:
	CanvasSubWindowItem(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};

class CanvasPopup : public BC_PopupMenu
{
public:
	CanvasPopup(Canvas *canvas);
	~CanvasPopup();

	void create_objects();

	Canvas *canvas;
	CanvasToggleControls *toggle_controls;
};

class CanvasPopupSize : public BC_MenuItem
{
public:
	CanvasPopupSize(Canvas *canvas, char *text, float percentage);
	~CanvasPopupSize();
	int handle_event();
	Canvas *canvas;
	float percentage;
};

class CanvasPopupAuto : public BC_MenuItem
{
public:
	CanvasPopupAuto(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};

class CanvasPopupResetCamera : public BC_MenuItem
{
public:
	CanvasPopupResetCamera(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};

class CanvasPopupResetProjector : public BC_MenuItem
{
public:
	CanvasPopupResetProjector(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};

class CanvasToggleControls : public BC_MenuItem
{
public:
	CanvasToggleControls(Canvas *canvas);
	int handle_event();
	static char* calculate_text(int cwindow_controls);
	Canvas *canvas;
};

class CanvasFullScreenItem : public BC_MenuItem
{
public:
	CanvasFullScreenItem(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};

class CanvasPopupResetTranslation : public BC_MenuItem
{
public:
	CanvasPopupResetTranslation(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};


class CanvasPopupRemoveSource : public BC_MenuItem
{
public:
	CanvasPopupRemoveSource(Canvas *canvas);
	int handle_event();
	Canvas *canvas;
};





#endif
