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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 "zoom_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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struct ViewportSign {

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	int32 left;

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	int32 top;

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	byte width_1, width_2;

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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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/** Drag and drop selection process, or, what to do with an area of land when

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 * you've selected it. */

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enum ViewportDragDropSelectionProcess {

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	DDSP_DEMOLISH_AREA,

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	DDSP_RAISE_AND_LEVEL_AREA,

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	DDSP_LOWER_AND_LEVEL_AREA,

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	DDSP_LEVEL_AREA,

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	DDSP_CREATE_DESERT,

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	DDSP_CREATE_ROCKS,

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	DDSP_CREATE_WATER,

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	DDSP_CREATE_RIVER,

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	DDSP_PLANT_TREES,

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	DDSP_BUILD_BRIDGE,

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	/* Rail specific actions */

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	DDSP_PLACE_RAIL_NE,

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	DDSP_PLACE_RAIL_NW,

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	DDSP_PLACE_AUTORAIL,

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	DDSP_BUILD_SIGNALS,

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	DDSP_BUILD_STATION,

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	DDSP_REMOVE_STATION,

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	DDSP_CONVERT_RAIL,

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	/* Road specific actions */

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	DDSP_PLACE_ROAD_X_DIR,

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	DDSP_PLACE_ROAD_Y_DIR,

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	DDSP_PLACE_AUTOROAD,

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};

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#endif /* VIEWPORT_TYPE_H */