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/* $Id$ */

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#ifndef WINDOW_H

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#define WINDOW_H

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#include "string.h"

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typedef union WindowEvent WindowEvent;

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typedef void WindowProc(Window *w, WindowEvent *e);

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/* How the resize system works:

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    First, you need to add a WWT_RESIZEBOX to the widgets, and you need

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     to add the flag WDF_RESIZABLE to the window. Now the window is ready

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     to resize itself.

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    As you may have noticed, all widgets have a RESIZE_XXX in their line.

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     This lines controls how the widgets behave on resize. RESIZE_NONE means

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     it doesn't do anything. Any other option let's one of the borders

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     move with the changed width/height. So if a widget has

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     RESIZE_RIGHT, and the window is made 5 pixels wider by the user,

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     the right of the window will also be made 5 pixels wider.

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    Now, what if you want to clamp a widget to the bottom? Give it the flag

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     RESIZE_TB. This is RESIZE_TOP + RESIZE_BOTTOM. Now if the window gets

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     5 pixels bigger, both the top and bottom gets 5 bigger, so the whole

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     widgets moves downwards without resizing, and appears to be clamped

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     to the bottom. Nice aint it?

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   You should know one more thing about this system. Most windows can't

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    handle an increase of 1 pixel. So there is a step function, which

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    let the windowsize only be changed by X pixels. You configure this

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    after making the window, like this:

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      w->resize.step_height = 10;

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    Now the window will only change in height in steps of 10.

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   You can also give a minimum width and height. The default value is

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    the default height/width of the window itself. You can change this

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    AFTER window-creation, with:

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     w->resize.width or w->resize.height.

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   That was all.. good luck, and enjoy :) -- TrueLight */

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enum {

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	RESIZE_NONE   = 0,

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	RESIZE_LEFT   = 1,

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	RESIZE_RIGHT  = 2,

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	RESIZE_TOP    = 4,

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	RESIZE_BOTTOM = 8,

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	RESIZE_LR     = RESIZE_LEFT  | RESIZE_RIGHT,

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	RESIZE_RB     = RESIZE_RIGHT | RESIZE_BOTTOM,

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	RESIZE_TB     = RESIZE_TOP   | RESIZE_BOTTOM,

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	RESIZE_LRB    = RESIZE_LEFT  | RESIZE_RIGHT  | RESIZE_BOTTOM,

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	RESIZE_LRTB   = RESIZE_LEFT  | RESIZE_RIGHT  | RESIZE_TOP | RESIZE_BOTTOM,

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	RESIZE_RTB    = RESIZE_RIGHT | RESIZE_TOP    | RESIZE_BOTTOM,

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};

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typedef struct Widget {

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	byte type;

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	byte resize_flag;

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	byte color;

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	uint16 left, right, top, bottom;

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	uint16 unkA;

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	StringID tooltips;

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} Widget;

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typedef enum FrameFlags {

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	FR_TRANSPARENT  = 0x01,  ///< Makes the background transparent if set

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	FR_BORDERONLY   = 0x10,  ///< Draw border only, no background

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	FR_LOWERED      = 0x20,  ///< If set the frame is lowered and the background color brighter (ie. buttons when pressed)

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	FR_DARKENED     = 0x40,  ///< If set the background is darker, allows for lowered frames with normal background color when used with FR_LOWERED (ie. dropdown boxes)

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} FrameFlags;

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void DrawFrameRect(int left, int top, int right, int bottom, int color, FrameFlags flags);

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/* XXX - outside "byte event" so you can set event directly without going into

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 * the union elements at first. Because of this every first element of the union

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 * MUST BE 'byte event'. Whoever did this must get shot! Scheduled for immediate

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 * rewrite after 0.4.0 */

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union WindowEvent {

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	byte event;

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	struct {

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		byte event;

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		Point pt;

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		int widget;

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	} click;

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	struct {

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		byte event;

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		Point pt;

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		TileIndex tile;

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		TileIndex starttile;

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		int userdata;

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	} place;

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	struct {

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		byte event;

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		Point pt;

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		int widget;

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	} dragdrop;

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	struct {

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		byte event;

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		Point size;

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		Point diff;

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	} sizing;

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	struct {

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		byte event;

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		char *str;

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	} edittext;

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	struct {

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		byte event;

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		Point pt;

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	} popupmenu;

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	struct {

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		byte event;

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		int button;

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		int index;

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	} dropdown;

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	struct {

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		byte event;

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		Point pt;

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		int widget;

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	} mouseover;

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	struct {

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		byte event;

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		bool cont;   // continue the search? (default true)

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		byte ascii;  // 8-bit ASCII-value of the key

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		uint16 keycode;// untranslated key (including shift-state)

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	} keypress;

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	struct {

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		byte event;

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		uint msg;    // message to be sent

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		uint wparam; // additional message-specific information

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		uint lparam; // additional message-specific information

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	} message;

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	struct {

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		byte event;

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		Point delta; // delta position against position of last call

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	} scroll;

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	struct {

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		byte event;

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		int wheel;   // how much was 'wheel'd'

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	} wheel;

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};

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enum WindowKeyCodes {

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	WKC_SHIFT = 0x8000,

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	WKC_CTRL  = 0x4000,

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	WKC_ALT   = 0x2000,

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	WKC_META  = 0x1000,

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	// Special ones

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	WKC_NONE        =  0,

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	WKC_ESC         =  1,

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	WKC_BACKSPACE   =  2,

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	WKC_INSERT      =  3,

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	WKC_DELETE      =  4,

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	WKC_PAGEUP      =  5,

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	WKC_PAGEDOWN    =  6,

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	WKC_END         =  7,

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	WKC_HOME        =  8,

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	// Arrow keys

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	WKC_LEFT        =  9,

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	WKC_UP          = 10,

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	WKC_RIGHT       = 11,

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	WKC_DOWN        = 12,

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	// Return & tab

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	WKC_RETURN      = 13,

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	WKC_TAB         = 14,

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	// Numerical keyboard

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	WKC_NUM_0       = 16,

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	WKC_NUM_1       = 17,

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	WKC_NUM_2       = 18,

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	WKC_NUM_3       = 19,

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	WKC_NUM_4       = 20,

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	WKC_NUM_5       = 21,

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	WKC_NUM_6       = 22,

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	WKC_NUM_7       = 23,

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	WKC_NUM_8       = 24,

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	WKC_NUM_9       = 25,

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	WKC_NUM_DIV     = 26,

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	WKC_NUM_MUL     = 27,

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	WKC_NUM_MINUS   = 28,

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	WKC_NUM_PLUS    = 29,

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	WKC_NUM_ENTER   = 30,

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	WKC_NUM_DECIMAL = 31,

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	// Space

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	WKC_SPACE       = 32,

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	// Function keys

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	WKC_F1          = 33,

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	WKC_F2          = 34,

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	WKC_F3          = 35,

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	WKC_F4          = 36,

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	WKC_F5          = 37,

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	WKC_F6          = 38,

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	WKC_F7          = 39,

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	WKC_F8          = 40,

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	WKC_F9          = 41,

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	WKC_F10         = 42,

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	WKC_F11         = 43,

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	WKC_F12         = 44,

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	// backquote is the key left of "1"

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	// we only store this key here, no matter what character is really mapped to it

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	// on a particular keyboard. (US keyboard: ` and ~ ; German keyboard: ^ and °)

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	WKC_BACKQUOTE   = 45,

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	WKC_PAUSE       = 46,

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	// 0-9 are mapped to 48-57

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	// A-Z are mapped to 65-90

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	// a-z are mapped to 97-122

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};

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typedef struct WindowDesc {

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	int16 left, top, width, height;

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	WindowClass cls;

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	WindowClass parent_cls;

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	uint32 flags;

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	const Widget *widgets;

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	WindowProc *proc;

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} WindowDesc;

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enum {

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	WDF_STD_TOOLTIPS    =  1, /* use standard routine when displaying tooltips */

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	WDF_DEF_WIDGET      =  2, /* default widget control for some widgets in the on click event */

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	WDF_STD_BTN         =  4, /* default handling for close and drag widgets (widget no 0 and 1) */

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	WDF_UNCLICK_BUTTONS = 16, /* Unclick buttons when the window event times out */

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	WDF_STICKY_BUTTON   = 32, /* Set window to sticky mode; they are not closed unless closed with 'X' (widget 2) */

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	WDF_RESIZABLE       = 64, /* A window can be resized */

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};

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/* can be used as x or y coordinates to cause a specific placement */

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enum {

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	WDP_AUTO   = -1,

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	WDP_CENTER = -2,

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};

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typedef struct Textbuf {

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	char *buf;                  /* buffer in which text is saved */

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	uint16 maxlength, maxwidth; /* the maximum size of the buffer. Maxwidth specifies screensize in pixels */

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	uint16 length, width;       /* the current size of the string. Width specifies screensize in pixels */

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	bool caret;                 /* is the caret ("_") visible or not */

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	uint16 caretpos;            /* the current position of the caret in the buffer */

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	uint16 caretxoffs;          /* the current position of the caret in pixels */

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} Textbuf;

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#define WP(ptr,str) (*(str*)(ptr)->custom)

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/* You cannot 100% reliably calculate the biggest custom struct as

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 * the number of pointers in it and alignment will have a huge impact.

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 * 96 is the largest window-size for 64-bit machines currently */

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#define WINDOW_CUSTOM_SIZE 96

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typedef struct Scrollbar {

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	uint16 count, cap, pos;

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} Scrollbar;

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typedef struct ResizeInfo {

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	uint width; /* Minimum width and height */

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	uint height;

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	uint step_width; /* In how big steps the width and height go */

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	uint step_height;

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} ResizeInfo;

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typedef struct WindowMessage {

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		int msg;

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		int wparam;

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		int lparam;

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} WindowMessage;

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struct Window {

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	uint16 flags4;

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	WindowClass window_class;

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	WindowNumber window_number;

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	int left, top;

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	int width, height;

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	Scrollbar hscroll, vscroll, vscroll2;

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	ResizeInfo resize;

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	byte caption_color;

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	uint32 click_state, disabled_state, hidden_state;

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	WindowProc *wndproc;

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	ViewPort *viewport;

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	const Widget *original_widget;

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	Widget *widget;

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	uint32 desc_flags;

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	WindowMessage message;

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	byte custom[WINDOW_CUSTOM_SIZE];

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};

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typedef struct querystr_d {

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	StringID caption;

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	WindowClass wnd_class;

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	WindowNumber wnd_num;

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	Textbuf text;

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	const char *orig;

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	CharSetFilter afilter;

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} querystr_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(querystr_d));

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typedef struct query_d {

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	StringID caption;

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	StringID message;

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	WindowClass wnd_class;

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	WindowNumber wnd_num;

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	void (*ok_cancel_callback)(bool ok_clicked);

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	bool calledback;

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} query_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(query_d));

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typedef struct {

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	byte item_count;      /* follow_vehicle */

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	byte sel_index;       /* scrollpos_x */

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	byte main_button;     /* scrollpos_y */

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	byte action_id;

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	StringID string_id;   /* unk30 */

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	uint16 checked_items; /* unk32 */

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	byte disabled_items;

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} menu_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(menu_d));

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typedef struct {

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	int16 data_1, data_2, data_3;

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	int16 data_4, data_5;

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	bool close;

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	byte byte_1;

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} def_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(def_d));

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typedef struct {

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	void *data;

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} void_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(void_d));

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typedef struct {

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	uint16 base;

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	uint16 count;

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} tree_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(tree_d));

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typedef struct {

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	StringID string_id;

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} tooltips_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(tooltips_d));

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typedef struct {

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	byte railtype;

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	byte sel_index;

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	EngineID sel_engine;

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	EngineID rename_engine;

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} buildtrain_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(buildtrain_d));

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typedef struct {

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	byte vehicletype;

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	byte sel_index[2];

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	EngineID sel_engine[2];

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	uint16 count[2];

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	bool wagon_btnstate; // true means engine is selected

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} replaceveh_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(replaceveh_d));

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typedef struct {

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	VehicleID sel;

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} traindepot_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(traindepot_d));

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typedef struct {

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	int sel;

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} order_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(order_d));

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typedef struct {

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	byte tab;

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} traindetails_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(traindetails_d));

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typedef struct {

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	int32 scroll_x;

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	int32 scroll_y;

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	int32 subscroll;

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} smallmap_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(smallmap_d));

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typedef struct {

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	uint32 face;

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	byte gender;

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} facesel_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(facesel_d));

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typedef struct {

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	int sel;

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	CargoID cargo;

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} refit_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(refit_d));

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typedef struct {

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	VehicleID follow_vehicle;

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	int32 scrollpos_x;

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	int32 scrollpos_y;

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} vp_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(vp_d) + 3 * sizeof(byte)); // + 3 * byte is a hack from Miham

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// vp2_d is the same as vp_d, except for the data_# values..

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typedef struct {

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	uint16 follow_vehicle;

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	int32 scrollpos_x;

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	int32 scrollpos_y;

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	byte data_1;

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	byte data_2;

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	byte data_3;

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} vp2_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(vp2_d));

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typedef struct {

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	uint16 follow_vehicle;

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	int32 scrollpos_x;

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	int32 scrollpos_y;

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	NewsItem *ni;

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} news_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(news_d));

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typedef struct {

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	uint32 background_img;

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	int8 rank;

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} highscore_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(highscore_d));

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typedef struct {

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	int height;

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	uint16 counter;

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} scroller_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(scroller_d));

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	VL_DESC    = 0x01,  // sort descending or ascending

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	VL_RESORT  = 0x02,  // instruct the code to resort the list in the next loop

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	VL_REBUILD = 0x04   // create sort-listing to use for qsort and friends

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typedef struct list_d {

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} list_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(list_d));

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typedef struct message_d {

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	int msg;

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	int wparam;

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	int lparam;

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} message_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(message_d));

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typedef struct dropdown_d {

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	uint32 disabled_state;

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	uint32 hidden_state;

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	WindowClass parent_wnd_class;

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	WindowNumber parent_wnd_num;

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	byte parent_button;

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	byte num_items;

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	byte selected_index;

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	const StringID *items;

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	byte click_delay;

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	bool drag_mode;

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} dropdown_d;

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assert_compile(WINDOW_CUSTOM_SIZE >= sizeof(dropdown_d));

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enum WindowEvents {

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	WE_CLICK               =  0,

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	WE_PAINT               =  1,

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	WE_MOUSELOOP           =  2,

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	WE_TICK                =  3,

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	WE_4                   =  4,