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/* $Id$ */

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/** @file viewport_type.h Types related to viewports. */

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#ifndef VIEWPORT_TYPE_H

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#define VIEWPORT_TYPE_H

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#include "core/geometry_type.hpp"

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#include "zoom_type.h"

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#include "window_type.h"

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#include "tile_type.h"

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/**

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 * Data structure for viewport, display of a part of the world

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 */

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struct ViewPort {

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	int left;    ///< Screen coordinate left egde of the viewport

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	int top;     ///< Screen coordinate top edge of the viewport

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	int width;   ///< Screen width of the viewport

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	int height;  ///< Screen height of the viewport

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	int virtual_left;    ///< Virtual left coordinate

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	int virtual_top;     ///< Virtual top coordinate

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	int virtual_width;   ///< width << zoom

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	int virtual_height;  ///< height << zoom

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	ZoomLevel zoom;

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};

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enum {

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	ZOOM_IN   = 0,

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	ZOOM_OUT  = 1,

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	ZOOM_NONE = 2, // hack, used to update the button status

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};

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/**

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 * Some values for constructing bounding boxes (BB). The Z positions under bridges are:

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 * z=0..5  Everything that can be built under low bridges.

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 * z=6     reserved, currently unused.

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 * z=7     Z separator between bridge/tunnel and the things under/above it.

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 */

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enum {

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	BB_HEIGHT_UNDER_BRIDGE = 6, ///< Everything that can be built under low bridges, must not exceed this Z height.

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	BB_Z_SEPARATOR  = 7,        ///< Separates the bridge/tunnel from the things under/above it.

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};

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/** Viewport place method (type of highlighted area and placed objects) */

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enum ViewportPlaceMethod {

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	VPM_X_OR_Y          = 0, ///< drag in X or Y direction

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	VPM_FIX_X           = 1, ///< drag only in X axis

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	VPM_FIX_Y           = 2, ///< drag only in Y axis

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	VPM_RAILDIRS        = 3, ///< all rail directions

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	VPM_X_AND_Y         = 4, ///< area of land in X and Y directions

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	VPM_X_AND_Y_LIMITED = 5, ///< area of land of limited size

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	VPM_SIGNALDIRS      = 6, ///< similiar to VMP_RAILDIRS, but with different cursor

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};

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/** Viewport highlight mode (for highlighting tiles below cursor) */

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enum ViewportHighlightMode {

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	VHM_NONE    = 0, ///< default

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	VHM_RECT    = 1, ///< rectangle (stations, depots, ...)

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	VHM_POINT   = 2, ///< point (lower land, raise land, level land, ...)

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	VHM_SPECIAL = 3, ///< special mode used for highlighting while dragging (and for tunnels/docks)

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	VHM_DRAG    = 4, ///< dragging items in the depot windows

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	VHM_RAIL    = 5, ///< rail pieces

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};

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/** Highlighting draw styles */

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enum HighLightStyle {

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	HT_NONE   = 0x00,

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	HT_RECT   = 0x80,

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	HT_POINT  = 0x40,

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	HT_LINE   = 0x20,    ///< used for autorail highlighting (longer streches)

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	                     ///< (uses lower bits to indicate direction)

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	HT_RAIL   = 0x10,    ///< autorail (one piece)

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	                     ///< (uses lower bits to indicate direction)

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	HT_DRAG_MASK = 0xF0, ///< masks the drag-type

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	/* lower bits (used with HT_LINE and HT_RAIL):

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	 * (see ASCII art in autorail.h for a visual interpretation) */

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	HT_DIR_X  = 0,    ///< X direction

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	HT_DIR_Y  = 1,    ///< Y direction

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	HT_DIR_HU = 2,    ///< horizontal upper

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	HT_DIR_HL = 3,    ///< horizontal lower

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	HT_DIR_VL = 4,    ///< vertical left

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	HT_DIR_VR = 5,    ///< vertical right

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	HT_DIR_MASK = 0x7 ///< masks the drag-direction

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};

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DECLARE_ENUM_AS_BIT_SET(HighLightStyle);

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struct TileHighlightData {

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	Point size;

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	Point outersize;

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	Point pos;

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	Point offs;

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	Point new_pos;

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	Point new_size;

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	Point new_outersize;

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	Point selend, selstart;

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	byte dirty;

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	byte sizelimit;

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	byte drawstyle;      // lower bits 0-3 are reserved for detailed highlight information information

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	byte new_drawstyle;  // only used in UpdateTileSelection() to as a buffer to compare if there was a change between old and new

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	byte next_drawstyle; // queued, but not yet drawn style

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	ViewportHighlightMode place_mode;

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	bool make_square_red;

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	WindowClass window_class;

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	WindowNumber window_number;

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	ViewportPlaceMethod select_method;

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	byte select_proc;

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	TileIndex redsq;

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};

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#endif /* VIEWPORT_TYPE_H */