src/window_gui.h

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * OpenTTD 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, version 2.
   6  * OpenTTD 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.
   7  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   8  */
   9
  10 /** @file window_gui.h Functions, definitions and such used only by the GUI. */
  11
  12 #ifndef WINDOW_GUI_H
  13 #define WINDOW_GUI_H
  14
  15 #include "map/coord.h"
  16 #include "vehicle_type.h"
  17 #include "viewport_type.h"
  18 #include "company_type.h"
  19 #include "widget_type.h"
  20 #include "core/smallvec_type.hpp"
  21 #include "core/smallmap_type.hpp"
  22 #include "string.h"
  23 #include "gfx_func.h"
  24
  25 /**
  26  * Flags to describe the look of the frame
  27  */
  28 enum FrameFlags {
  29         FR_NONE         =  0,
  30         FR_TRANSPARENT  =  1 << 0,  ///< Makes the background transparent if set
  31         FR_BORDERONLY   =  1 << 4,  ///< Draw border only, no background
  32         FR_LOWERED      =  1 << 5,  ///< If set the frame is lowered and the background colour brighter (ie. buttons when pressed)
  33         FR_DARKENED     =  1 << 6,  ///< If set the background is darker, allows for lowered frames with normal background colour when used with FR_LOWERED (ie. dropdown boxes)
  34 };
  35
  36 DECLARE_ENUM_AS_BIT_SET(FrameFlags)
  37
  38 /** Distances used in drawing widgets. */
  39 enum WidgetDrawDistances {
  40         /* WWT_IMGBTN(_2) */
  41         WD_IMGBTN_LEFT    = 1,      ///< Left offset of the image in the button.
  42         WD_IMGBTN_RIGHT   = 1,      ///< Right offset of the image in the button.
  43         WD_IMGBTN_TOP     = 1,      ///< Top offset of image in the button.
  44         WD_IMGBTN_BOTTOM  = 1,      ///< Bottom offset of image in the button.
  45
  46         /* WWT_INSET */
  47         WD_INSET_LEFT  = 2,         ///< Left offset of string.
  48         WD_INSET_RIGHT = 2,         ///< Right offset of string.
  49         WD_INSET_TOP   = 1,         ///< Top offset of string.
  50
  51         WD_SCROLLBAR_LEFT   = 2,    ///< Left offset of scrollbar.
  52         WD_SCROLLBAR_RIGHT  = 2,    ///< Right offset of scrollbar.
  53         WD_SCROLLBAR_TOP    = 2,    ///< Top offset of scrollbar.
  54         WD_SCROLLBAR_BOTTOM = 2,    ///< Bottom offset of scrollbar.
  55
  56         /* Size of the pure frame bevel without any padding. */
  57         WD_BEVEL_LEFT       = 1,    ///< Width of left bevel border.
  58         WD_BEVEL_RIGHT      = 1,    ///< Width of right bevel border.
  59         WD_BEVEL_TOP        = 1,    ///< Height of top bevel border.
  60         WD_BEVEL_BOTTOM     = 1,    ///< Height of bottom bevel border.
  61
  62         /* FrameRect widgets, all text buttons, panel, editbox */
  63         WD_FRAMERECT_LEFT   = 2,    ///< Offset at left to draw the frame rectangular area
  64         WD_FRAMERECT_RIGHT  = 2,    ///< Offset at right to draw the frame rectangular area
  65         WD_FRAMERECT_TOP    = 1,    ///< Offset at top to draw the frame rectangular area
  66         WD_FRAMERECT_BOTTOM = 1,    ///< Offset at bottom to draw the frame rectangular area
  67
  68         /* Extra space at top/bottom of text panels */
  69         WD_TEXTPANEL_TOP    = 6,    ///< Offset at top to draw above the text
  70         WD_TEXTPANEL_BOTTOM = 6,    ///< Offset at bottom to draw below the text
  71
  72         /* WWT_FRAME */
  73         WD_FRAMETEXT_LEFT   = 6,    ///< Left offset of the text of the frame.
  74         WD_FRAMETEXT_RIGHT  = 6,    ///< Right offset of the text of the frame.
  75         WD_FRAMETEXT_TOP    = 6,    ///< Top offset of the text of the frame
  76         WD_FRAMETEXT_BOTTOM = 6,    ///< Bottom offset of the text of the frame
  77
  78         /* WWT_MATRIX */
  79         WD_MATRIX_LEFT   = 2,       ///< Offset at left of a matrix cell.
  80         WD_MATRIX_RIGHT  = 2,       ///< Offset at right of a matrix cell.
  81         WD_MATRIX_TOP    = 3,       ///< Offset at top of a matrix cell.
  82         WD_MATRIX_BOTTOM = 1,       ///< Offset at bottom of a matrix cell.
  83
  84         /* WWT_SHADEBOX */
  85         WD_SHADEBOX_WIDTH  = 12,    ///< Width of a standard shade box widget.
  86         WD_SHADEBOX_LEFT   = 2,     ///< Left offset of shade sprite.
  87         WD_SHADEBOX_RIGHT  = 2,     ///< Right offset of shade sprite.
  88         WD_SHADEBOX_TOP    = 3,     ///< Top offset of shade sprite.
  89         WD_SHADEBOX_BOTTOM = 3,     ///< Bottom offset of shade sprite.
  90
  91         /* WWT_STICKYBOX */
  92         WD_STICKYBOX_WIDTH  = 12,   ///< Width of a standard sticky box widget.
  93         WD_STICKYBOX_LEFT   = 2,    ///< Left offset of sticky sprite.
  94         WD_STICKYBOX_RIGHT  = 2,    ///< Right offset of sticky sprite.
  95         WD_STICKYBOX_TOP    = 3,    ///< Top offset of sticky sprite.
  96         WD_STICKYBOX_BOTTOM = 3,    ///< Bottom offset of sticky sprite.
  97
  98         /* WWT_DEBUGBOX */
  99         WD_DEBUGBOX_WIDTH  = 12,    ///< Width of a standard debug box widget.
 100         WD_DEBUGBOX_LEFT   = 2,     ///< Left offset of debug sprite.
 101         WD_DEBUGBOX_RIGHT  = 2,     ///< Right offset of debug sprite.
 102         WD_DEBUGBOX_TOP    = 3,     ///< Top offset of debug sprite.
 103         WD_DEBUGBOX_BOTTOM = 3,     ///< Bottom offset of debug sprite.
 104
 105         /* WWT_DEFSIZEBOX */
 106         WD_DEFSIZEBOX_WIDTH  = 12,  ///< Width of a standard defsize box widget.
 107         WD_DEFSIZEBOX_LEFT   = 2,   ///< Left offset of defsize sprite.
 108         WD_DEFSIZEBOX_RIGHT  = 2,   ///< Right offset of defsize sprite.
 109         WD_DEFSIZEBOX_TOP    = 3,   ///< Top offset of defsize sprite.
 110         WD_DEFSIZEBOX_BOTTOM = 3,   ///< Bottom offset of defsize sprite.
 111
 112         /* WWT_RESIZEBOX */
 113         WD_RESIZEBOX_WIDTH  = 12,   ///< Width of a resize box widget.
 114         WD_RESIZEBOX_LEFT   = 2,    ///< Left offset of resize sprite.
 115         WD_RESIZEBOX_RIGHT  = 2,    ///< Right offset of resize sprite.
 116         WD_RESIZEBOX_TOP    = 2,    ///< Top offset of resize sprite.
 117         WD_RESIZEBOX_BOTTOM = 2,    ///< Bottom offset of resize sprite.
 118
 119         /* WWT_CLOSEBOX */
 120         WD_CLOSEBOX_WIDTH  = 11,    ///< Width of a close box widget.
 121         WD_CLOSEBOX_LEFT   = 2,     ///< Left offset of closebox string.
 122         WD_CLOSEBOX_RIGHT  = 1,     ///< Right offset of closebox string.
 123         WD_CLOSEBOX_TOP    = 2,     ///< Top offset of closebox string.
 124         WD_CLOSEBOX_BOTTOM = 2,     ///< Bottom offset of closebox string.
 125
 126         /* WWT_CAPTION */
 127         WD_CAPTION_HEIGHT     = 14, ///< Height of a title bar.
 128         WD_CAPTIONTEXT_LEFT   = 2,  ///< Offset of the caption text at the left.
 129         WD_CAPTIONTEXT_RIGHT  = 2,  ///< Offset of the caption text at the right.
 130         WD_CAPTIONTEXT_TOP    = 2,  ///< Offset of the caption text at the top.
 131         WD_CAPTIONTEXT_BOTTOM = 2,  ///< Offset of the caption text at the bottom.
 132
 133         /* Dropdown widget. */
 134         WD_DROPDOWN_HEIGHT     = 12, ///< Height of a drop down widget.
 135         WD_DROPDOWNTEXT_LEFT   = 2,  ///< Left offset of the dropdown widget string.
 136         WD_DROPDOWNTEXT_RIGHT  = 2,  ///< Right offset of the dropdown widget string.
 137         WD_DROPDOWNTEXT_TOP    = 1,  ///< Top offset of the dropdown widget string.
 138         WD_DROPDOWNTEXT_BOTTOM = 1,  ///< Bottom offset of the dropdown widget string.
 139
 140         WD_PAR_VSEP_NORMAL = 2,      ///< Normal amount of vertical space between two paragraphs of text.
 141         WD_PAR_VSEP_WIDE   = 8,      ///< Large amount of vertical space between two paragraphs of text.
 142 };
 143
 144 /* widget.cpp */
 145 void DrawFrameRect (BlitArea *dpi, int left, int top, int right, int bottom, Colours colour, FrameFlags flags);
 146 void DrawCaption (BlitArea *dpi, const Rect &r, Colours colour, Owner owner, StringID str);
 147
 148 /* window.cpp */
 149 extern Window *_z_front_window;
 150 extern Window *_z_back_window;
 151 extern Window *_focused_window;
 152
 153
 154 /** How do we the window to be placed? */
 155 enum WindowPosition {
 156         WDP_MANUAL,        ///< Manually align the window (so no automatic location finding)
 157         WDP_AUTO,          ///< Find a place automatically
 158         WDP_CENTER,        ///< Center the window
 159         WDP_ALIGN_TOOLBAR, ///< Align toward the toolbar
 160 };
 161
 162 Point GetToolbarAlignedWindowPosition(int window_width);
 163
 164 struct HotkeyList;
 165
 166 /**
 167  * High level window description
 168  */
 169 struct WindowDesc {
 170         struct Prefs {
 171                 const char *const key; ///< Key to store window defaults in the config file.
 172                 int16 pref_width;      ///< User-preferred width of the window. Zero if unset.
 173                 int16 pref_height;     ///< User-preferred height of the window. Zero if unset.
 174                 bool  pref_sticky;     ///< Preferred stickyness.
 175
 176                 Prefs (const char *key);
 177                 ~Prefs();
 178         };
 179
 180         /** Window description constructor. */
 181         CONSTEXPR WindowDesc (WindowPosition def_pos, int16 def_width_trad, int16 def_height_trad,
 182                         WindowClass window_class, WindowClass parent_class, uint32 flags,
 183                         const NWidgetPart *nwid_parts, int16 nwid_length,
 184                         Prefs *prefs = NULL, HotkeyList *hotkeys = NULL) :
 185                 default_pos(def_pos),
 186                 cls(window_class),
 187                 parent_cls(parent_class),
 188                 flags(flags),
 189                 nwid_parts(nwid_parts),
 190                 nwid_length(nwid_length),
 191                 prefs(prefs),
 192                 hotkeys(hotkeys),
 193                 default_width_trad(def_width_trad),
 194                 default_height_trad(def_height_trad)
 195         {
 196         }
 197
 198         WindowPosition default_pos;    ///< Preferred position of the window. @see WindowPosition()
 199         WindowClass cls;               ///< Class of the window, @see WindowClass.
 200         WindowClass parent_cls;        ///< Class of the parent window. @see WindowClass
 201         uint32 flags;                  ///< Flags. @see WindowDefaultFlag
 202         const NWidgetPart *nwid_parts; ///< Nested widget parts describing the window.
 203         int16 nwid_length;             ///< Length of the #nwid_parts array.
 204         Prefs *prefs;                  ///< Preferred dimensions and state.
 205         HotkeyList *hotkeys;           ///< Hotkeys for the window.
 206
 207         int16 GetDefaultWidth() const;
 208         int16 GetDefaultHeight() const;
 209
 210         static void LoadFromConfig();
 211         static void SaveToConfig();
 212
 213 private:
 214         int16 default_width_trad;      ///< Preferred initial width of the window (pixels at 1x zoom).
 215         int16 default_height_trad;     ///< Preferred initial height of the window (pixels at 1x zoom).
 216
 217         /**
 218          * Dummy private copy constructor to prevent compilers from
 219          * copying the structure, which fails due to _window_descs.
 220          */
 221         WindowDesc(const WindowDesc &other);
 222 };
 223
 224 /**
 225  * Window default widget/window handling flags
 226  */
 227 enum WindowDefaultFlag {
 228         WDF_CONSTRUCTION    =   1 << 0, ///< This window is used for construction; close it whenever changing company.
 229         WDF_MODAL           =   1 << 1, ///< The window is a modal child of some other window, meaning the parent is 'inactive'
 230         WDF_NO_FOCUS        =   1 << 2, ///< This window won't get focus/make any other window lose focus when click
 231 };
 232
 233 /**
 234  * Data structure for resizing a window
 235  */
 236 struct ResizeInfo {
 237         uint step_width;  ///< Step-size of width resize changes
 238         uint step_height; ///< Step-size of height resize changes
 239 };
 240
 241 /** State of a sort direction button. */
 242 enum SortButtonState {
 243         SBS_OFF,  ///< Do not sort (with this button).
 244         SBS_DOWN, ///< Sort ascending.
 245         SBS_UP,   ///< Sort descending.
 246 };
 247
 248 /**
 249  * Window flags.
 250  */
 251 enum WindowFlags {
 252         WF_TIMEOUT           = 1 <<  0, ///< Window timeout counter.
 253
 254         WF_DRAGGING          = 1 <<  3, ///< Window is being dragged.
 255         WF_SIZING_RIGHT      = 1 <<  4, ///< Window is being resized towards the right.
 256         WF_SIZING_LEFT       = 1 <<  5, ///< Window is being resized towards the left.
 257         WF_SIZING            = WF_SIZING_RIGHT | WF_SIZING_LEFT, ///< Window is being resized.
 258         WF_STICKY            = 1 <<  6, ///< Window is made sticky by user
 259         WF_DISABLE_VP_SCROLL = 1 <<  7, ///< Window does not do autoscroll, @see HandleAutoscroll().
 260         WF_WHITE_BORDER      = 1 <<  8, ///< Window white border counter bit mask.
 261         WF_HIGHLIGHTED       = 1 <<  9, ///< Window has a widget that has a highlight.
 262         WF_CENTERED          = 1 << 10, ///< Window is centered and shall stay centered after ReInit.
 263 };
 264 DECLARE_ENUM_AS_BIT_SET(WindowFlags)
 265
 266 static const int TIMEOUT_DURATION = 7; ///< The initial timeout value for WF_TIMEOUT.
 267 static const int WHITE_BORDER_DURATION = 3; ///< The initial timeout value for WF_WHITE_BORDER.
 268
 269 /**
 270  * Data structure for a window viewport.
 271  * A viewport is either following a vehicle (its id in then in #follow_vehicle), or it aims to display a specific
 272  * location #dest_scrollpos_x, #dest_scrollpos_y (#follow_vehicle is then #INVALID_VEHICLE).
 273  * The actual location being shown is #scrollpos_x, #scrollpos_y.
 274  * @see InitializeViewport(), UpdateViewportPosition(), UpdateViewportCoordinates().
 275  */
 276 struct ViewportData : ViewPort {
 277         VehicleID follow_vehicle; ///< VehicleID to follow if following a vehicle, #INVALID_VEHICLE otherwise.
 278         int32 scrollpos_x;        ///< Currently shown x coordinate (virtual screen coordinate of topleft corner of the viewport).
 279         int32 scrollpos_y;        ///< Currently shown y coordinate (virtual screen coordinate of topleft corner of the viewport).
 280         int32 dest_scrollpos_x;   ///< Current destination x coordinate to display (virtual screen coordinate of topleft corner of the viewport).
 281         int32 dest_scrollpos_y;   ///< Current destination y coordinate to display (virtual screen coordinate of topleft corner of the viewport).
 282 };
 283
 284 struct QueryString;
 285
 286 /**
 287  * Data structure for an opened window
 288  */
 289 struct Window {
 290 protected:
 291         virtual void FindWindowPlacementAndResize(int def_width, int def_height);
 292
 293         SmallVector<int, 4> scheduled_invalidation_data;  ///< Data of scheduled OnInvalidateData() calls.
 294
 295 public:
 296         Window (const WindowDesc *desc);
 297
 298         virtual ~Window();
 299
 300         /**
 301          * Helper allocation function to disallow something.
 302          * Don't allow arrays; arrays of Windows are pointless as you need
 303          * to destruct them all at the same time too, which is kinda hard.
 304          * @param size the amount of space not to allocate
 305          */
 306         inline void *operator new[](size_t size)
 307         {
 308                 NOT_REACHED();
 309         }
 310
 311         /**
 312          * Memory release for an array of class instances.
 313          * @param ptr  the memory to free.
 314          */
 315         inline void operator delete[](void *ptr)
 316         {
 317                 NOT_REACHED();
 318         }
 319
 320         const WindowDesc *window_desc; ///< Window description
 321         WindowFlags flags;          ///< Window flags
 322         WindowClass window_class;   ///< Window class
 323         WindowNumber window_number; ///< Window number within the window class
 324
 325         uint8 timeout_timer;      ///< Timer value of the WF_TIMEOUT for flags.
 326         uint8 white_border_timer; ///< Timer value of the WF_WHITE_BORDER for flags.
 327
 328         int left;   ///< x position of left edge of the window
 329         int top;    ///< y position of top edge of the window
 330         int width;  ///< width of the window (number of pixels to the right in x direction)
 331         int height; ///< Height of the window (number of pixels down in y direction)
 332
 333         ResizeInfo resize;  ///< Resize information
 334
 335         Owner owner;        ///< The owner of the content shown in this window. Company colour is acquired from this variable.
 336
 337         ViewportData *viewport;          ///< Pointer to viewport data, if present.
 338         const NWidgetCore *nested_focus; ///< Currently focused nested widget, or \c NULL if no nested widget has focus.
 339         SmallMap<int, QueryString*> querystrings; ///< QueryString associated to WWT_EDITBOX widgets.
 340         NWidgetBase *nested_root;        ///< Root of the nested tree.
 341         NWidgetBase **nested_array;      ///< Array of pointers into the tree. Do not access directly, use #Window::GetWidget() instead.
 342         uint nested_array_size;          ///< Size of the nested array.
 343         NWidgetStacked *shade_select;    ///< Selection widget (#NWID_SELECTION) to use for shading the window. If \c NULL, window cannot shade.
 344         Dimension unshaded_size;         ///< Last known unshaded size (only valid while shaded).
 345
 346         int scrolling_scrollbar;         ///< Widgetindex of just being dragged scrollbar. -1 if none is active.
 347
 348         Window *parent;                  ///< Parent window.
 349         Window *z_front;                 ///< The window in front of us in z-order.
 350         Window *z_back;                  ///< The window behind us in z-order.
 351
 352         template <class NWID>
 353         inline const NWID *GetWidget(uint widnum) const;
 354         template <class NWID>
 355         inline NWID *GetWidget(uint widnum);
 356
 357         const Scrollbar *GetScrollbar(uint widnum) const;
 358         Scrollbar *GetScrollbar(uint widnum);
 359
 360         const QueryString *GetQueryString(uint widnum) const;
 361         QueryString *GetQueryString(uint widnum);
 362
 363         virtual const char *GetFocusedText() const;
 364         virtual const char *GetCaret() const;
 365         virtual const char *GetMarkedText(size_t *length) const;
 366         virtual Point GetCaretPosition() const;
 367         virtual Rect GetTextBoundingRect(const char *from, const char *to) const;
 368         virtual const char *GetTextCharacterAtPosition(const Point &pt) const;
 369
 370         void InitNested(WindowNumber number = 0);
 371         void CreateNestedTree(void);
 372
 373         void Delete (void);
 374
 375         /**
 376          * Set the timeout flag of the window and initiate the timer.
 377          */
 378         inline void SetTimeout()
 379         {
 380                 this->flags |= WF_TIMEOUT;
 381                 this->timeout_timer = TIMEOUT_DURATION;
 382         }
 383
 384         /**
 385          * Set the timeout flag of the window and initiate the timer.
 386          */
 387         inline void SetWhiteBorder()
 388         {
 389                 this->flags |= WF_WHITE_BORDER;
 390                 this->white_border_timer = WHITE_BORDER_DURATION;
 391         }
 392
 393         void DisableAllWidgetHighlight();
 394         void SetWidgetHighlight(byte widget_index, TextColour highlighted_colour);
 395         bool IsWidgetHighlighted(byte widget_index) const;
 396
 397         /**
 398          * Sets the enabled/disabled status of a widget.
 399          * By default, widgets are enabled.
 400          * On certain conditions, they have to be disabled.
 401          * @param widget_index index of this widget in the window
 402          * @param disab_stat status to use ie: disabled = true, enabled = false
 403          */
 404         inline void SetWidgetDisabledState(byte widget_index, bool disab_stat)
 405         {
 406                 assert(widget_index < this->nested_array_size);
 407                 if (this->nested_array[widget_index] != NULL) this->GetWidget<NWidgetCore>(widget_index)->SetDisabled(disab_stat);
 408         }
 409
 410         /**
 411          * Sets a widget to disabled.
 412          * @param widget_index index of this widget in the window
 413          */
 414         inline void DisableWidget(byte widget_index)
 415         {
 416                 SetWidgetDisabledState(widget_index, true);
 417         }
 418
 419         /**
 420          * Sets a widget to Enabled.
 421          * @param widget_index index of this widget in the window
 422          */
 423         inline void EnableWidget(byte widget_index)
 424         {
 425                 SetWidgetDisabledState(widget_index, false);
 426         }
 427
 428         /**
 429          * Gets the enabled/disabled status of a widget.
 430          * @param widget_index index of this widget in the window
 431          * @return status of the widget ie: disabled = true, enabled = false
 432          */
 433         inline bool IsWidgetDisabled(byte widget_index) const
 434         {
 435                 assert(widget_index < this->nested_array_size);
 436                 return this->GetWidget<NWidgetCore>(widget_index)->IsDisabled();
 437         }
 438
 439         /**
 440          * Check if given widget is focused within this window
 441          * @param widget_index : index of the widget in the window to check
 442          * @return true if given widget is the focused window in this window
 443          */
 444         inline bool IsWidgetFocused(byte widget_index) const
 445         {
 446                 return this->nested_focus != NULL && this->nested_focus->index == widget_index;
 447         }
 448
 449         /**
 450          * Check if given widget has user input focus. This means that both the window
 451          * has focus and that the given widget has focus within the window.
 452          * @param widget_index : index of the widget in the window to check
 453          * @return true if given widget is the focused window in this window and this window has focus
 454          */
 455         inline bool IsWidgetGloballyFocused(byte widget_index) const
 456         {
 457                 return _focused_window == this && IsWidgetFocused(widget_index);
 458         }
 459
 460         /**
 461          * Sets the lowered/raised status of a widget.
 462          * @param widget_index index of this widget in the window
 463          * @param lowered_stat status to use ie: lowered = true, raised = false
 464          */
 465         inline void SetWidgetLoweredState(byte widget_index, bool lowered_stat)
 466         {
 467                 assert(widget_index < this->nested_array_size);
 468                 this->GetWidget<NWidgetCore>(widget_index)->SetLowered(lowered_stat);
 469         }
 470
 471         /**
 472          * Invert the lowered/raised  status of a widget.
 473          * @param widget_index index of this widget in the window
 474          */
 475         inline void ToggleWidgetLoweredState(byte widget_index)
 476         {
 477                 assert(widget_index < this->nested_array_size);
 478                 bool lowered_state = this->GetWidget<NWidgetCore>(widget_index)->IsLowered();
 479                 this->GetWidget<NWidgetCore>(widget_index)->SetLowered(!lowered_state);
 480         }
 481
 482         /**
 483          * Marks a widget as lowered.
 484          * @param widget_index index of this widget in the window
 485          */
 486         inline void LowerWidget(byte widget_index)
 487         {
 488                 SetWidgetLoweredState(widget_index, true);
 489         }
 490
 491         /**
 492          * Marks a widget as raised.
 493          * @param widget_index index of this widget in the window
 494          */
 495         inline void RaiseWidget(byte widget_index)
 496         {
 497                 SetWidgetLoweredState(widget_index, false);
 498         }
 499
 500         /**
 501          * Gets the lowered state of a widget.
 502          * @param widget_index index of this widget in the window
 503          * @return status of the widget ie: lowered = true, raised= false
 504          */
 505         inline bool IsWidgetLowered(byte widget_index) const
 506         {
 507                 assert(widget_index < this->nested_array_size);
 508                 return this->GetWidget<NWidgetCore>(widget_index)->IsLowered();
 509         }
 510
 511         void UnfocusFocusedWidget();
 512         bool SetFocusedWidget(int widget_index);
 513
 514         EventState HandleEditBoxKey(int wid, WChar key, uint16 keycode);
 515         virtual void InsertTextString(int wid, const char *str, bool marked, const char *caret, const char *insert_location, const char *replacement_end);
 516
 517         void HandleButtonClick(byte widget);
 518         int GetRowFromWidget(int clickpos, int widget, int padding, int line_height = -1) const;
 519
 520         void RaiseButtons(bool autoraise = false);
 521         void CDECL SetWidgetsDisabledState(bool disab_stat, int widgets, ...);
 522         void CDECL SetWidgetsLoweredState(bool lowered_stat, int widgets, ...);
 523         void SetWidgetDirty(byte widget_index) const;
 524
 525         void DrawWidgets (BlitArea *dpi) const;
 526         void DrawViewport (BlitArea *dpi) const;
 527         void DrawSortButtonState (BlitArea *dpi, int widget, SortButtonState state) const;
 528         static int SortButtonWidth();
 529
 530         void DeleteChildWindows(WindowClass wc = WC_INVALID) const;
 531
 532         void SetDirty() const;
 533         void ReInit(int rx = 0, int ry = 0);
 534
 535         /** Is window shaded currently? */
 536         inline bool IsShaded() const
 537         {
 538                 return this->shade_select != NULL && this->shade_select->shown_plane == SZSP_HORIZONTAL;
 539         }
 540
 541         void SetShaded(bool make_shaded);
 542
 543         void InvalidateData(int data = 0, bool gui_scope = true);
 544         void ProcessScheduledInvalidations();
 545         void ProcessHighlightedInvalidations();
 546
 547         /*** Event handling ***/
 548
 549         /**
 550          * Notification that the nested widget tree gets initialized. The event can be used to perform general computations.
 551          * @note #nested_root and/or #nested_array (normally accessed via #GetWidget()) may not exist during this call.
 552          */
 553         virtual void OnInit() { }
 554
 555         /** Notification that the window is about to be deleted. */
 556         virtual void OnDelete (void) { }
 557
 558         /**
 559          * Compute the initial position of the window.
 560          * @param sm_width      Smallest width of the window.
 561          * @param sm_height     Smallest height of the window.
 562          * @param window_number The window number of the new window.
 563          * @return Initial position of the top-left corner of the window.
 564          */
 565         virtual Point OnInitialPosition(int16 sm_width, int16 sm_height, int window_number);
 566
 567         /**
 568          * The window must be repainted.
 569          * @note This method should not change any state, it should only use drawing functions.
 570          */
 571         virtual void OnPaint (BlitArea *dpi)
 572         {
 573                 this->DrawWidgets (dpi);
 574         }
 575
 576         /**
 577          * Draw the contents of a nested widget.
 578          * @param dpi    Area to draw on.
 579          * @param r      Rectangle occupied by the widget.
 580          * @param widget Number of the widget to draw.
 581          * @note This method may not change any state, it may only use drawing functions.
 582          */
 583         virtual void DrawWidget (BlitArea *dpi, const Rect &r, int widget) const
 584         {
 585         }
 586
 587         /**
 588          * Update size and resize step of a widget in the window.
 589          * After retrieval of the minimal size and the resize-steps of a widget, this function is called to allow further refinement,
 590          * typically by computing the real maximal size of the content. Afterwards, \a size is taken to be the minimal size of the widget
 591          * and \a resize is taken to contain the resize steps. For the convenience of the callee, \a padding contains the amount of
 592          * padding between the content and the edge of the widget. This should be added to the returned size.
 593          * @param widget  Widget number.
 594          * @param size    Size of the widget.
 595          * @param padding Recommended amount of space between the widget content and the widget edge.
 596          * @param fill    Fill step of the widget.
 597          * @param resize  Resize step of the widget.
 598          */
 599         virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize) {}
 600
 601         /**
 602          * Initialize string parameters for a widget.
 603          * Calls to this function are made during initialization to measure the size (that is as part of #InitNested()), during drawing,
 604          * and while re-initializing the window. Only for widgets that render text initializing is requested.
 605          * @param widget  Widget number.
 606          */
 607         virtual void SetStringParameters(int widget) const {}
 608
 609         /**
 610          * Called when window gains focus
 611          */
 612         virtual void OnFocus() {}
 613
 614         virtual void OnFocusLost();
 615
 616         /**
 617          * A key has been pressed.
 618          * @param key     the Unicode value of the key.
 619          * @param keycode the untranslated key code including shift state.
 620          * @return Whether the key press has been handled and no other
 621          *         window should receive the event.
 622          */
 623         virtual bool OnKeyPress (WChar key, uint16 keycode)
 624         {
 625                 return false;
 626         }
 627
 628         virtual bool OnHotkey (int hotkey);
 629
 630         /**
 631          * The state of the control key has changed
 632          * @return Whether the change has been handled and no other
 633          *         window should receive the event.
 634          */
 635         virtual bool OnCTRLStateChange (void)
 636         {
 637                 return false;
 638         }
 639
 640
 641         /**
 642          * A click with the left mouse button has been made on the window.
 643          * @param pt     the point inside the window that has been clicked.
 644          * @param widget the clicked widget.
 645          * @param click_count Number of fast consecutive clicks at same position
 646          */
 647         virtual void OnClick(Point pt, int widget, int click_count) {}
 648
 649         /**
 650          * A click with the right mouse button has been made on the window.
 651          * @param pt     the point inside the window that has been clicked.
 652          * @param widget the clicked widget.
 653          * @return true if the click was actually handled, i.e. do not show a
 654          *         tooltip if tooltip-on-right-click is enabled.
 655          */
 656         virtual bool OnRightClick(Point pt, int widget) { return false; }
 657
 658         /**
 659          * The mouse is hovering over a widget in the window, perform an action for it, like opening a custom tooltip.
 660          * @param pt     The point where the mouse is hovering.
 661          * @param widget The widget where the mouse is hovering.
 662          */
 663         virtual void OnHover(Point pt, int widget) {}
 664
 665         /**
 666          * An 'object' is being dragged at the provided position, highlight the target if possible.
 667          * @param pt     The point inside the window that the mouse hovers over.
 668          * @param widget The widget the mouse hovers over.
 669          */
 670         virtual void OnMouseDrag(Point pt, int widget) {}
 671
 672         /**
 673          * A dragged 'object' has been released.
 674          * @param pt     the point inside the window where the release took place.
 675          * @param widget the widget where the release took place.
 676          */
 677         virtual void OnDragDrop(Point pt, int widget) {}
 678
 679         /**
 680          * Handle the request for (viewport) scrolling.
 681          * @param delta the amount the viewport must be scrolled.
 682          */
 683         virtual void OnScroll(Point delta) {}
 684
 685         /**
 686          * The mouse is currently moving over the window or has just moved outside
 687          * of the window. In the latter case pt is (-1, -1).
 688          * @param pt     the point inside the window that the mouse hovers over.
 689          * @param widget the widget the mouse hovers over.
 690          */
 691         virtual void OnMouseOver(Point pt, int widget) {}
 692
 693         /**
 694          * The mouse wheel has been turned.
 695          * @param wheel the amount of movement of the mouse wheel.
 696          */
 697         virtual void OnMouseWheel(int wheel) {}
 698
 699
 700         /**
 701          * Called for every mouse loop run, which is at least once per (game) tick.
 702          */
 703         virtual void OnMouseLoop() {}
 704
 705         /**
 706          * Called once per (game) tick.
 707          */
 708         virtual void OnTick() {}
 709
 710         /**
 711          * Called once every 100 (game) ticks.
 712          */
 713         virtual void OnHundredthTick() {}
 714
 715         /**
 716          * Called when this window's timeout has been reached.
 717          */
 718         virtual void OnTimeout() {}
 719
 720
 721         /**
 722          * Called after the window got resized.
 723          * For nested windows with a viewport, call NWidgetViewport::UpdateViewportCoordinates.
 724          */
 725         virtual void OnResize() {}
 726
 727         /**
 728          * A dropdown option associated to this window has been selected.
 729          * @param widget the widget (button) that the dropdown is associated with.
 730          * @param index  the element in the dropdown that is selected.
 731          */
 732         virtual void OnDropdownSelect(int widget, int index) {}
 733
 734         virtual void OnDropdownClose(Point pt, int widget, int index, bool instant_close);
 735
 736         /**
 737          * The text in an editbox has been edited.
 738          * @param widget The widget of the editbox.
 739          */
 740         virtual void OnEditboxChanged(int widget) {}
 741
 742         /**
 743          * The query window opened from this window has closed.
 744          * @param str the new value of the string, NULL if the window
 745          *            was cancelled or an empty string when the default
 746          *            button was pressed, i.e. StrEmpty(str).
 747          */
 748         virtual void OnQueryTextFinished(char *str) {}
 749
 750         /**
 751          * Some data on this window has become invalid.
 752          * @param data information about the changed data.
 753          * @param gui_scope Whether the call is done from GUI scope. You may not do everything when not in GUI scope. See #InvalidateWindowData() for details.
 754          */
 755         virtual void OnInvalidateData(int data = 0, bool gui_scope = true) {}
 756
 757         /**
 758          * The user clicked some place on the map when a tile highlight mode
 759          * has been set.
 760          * @param pt   the exact point on the map that has been clicked.
 761          * @param tile the tile on the map that has been clicked.
 762          */
 763         virtual void OnPlaceObject(Point pt, TileIndex tile) {}
 764
 765         /**
 766          * The user clicked on a vehicle.
 767          * @param v clicked vehicle. It is guaranteed to be v->IsPrimaryVehicle() == true
 768          * @return True if the click is handled, false if it is ignored.
 769          */
 770         virtual bool OnVehicleSelect(const struct Vehicle *v) { return false; }
 771
 772         /**
 773          * The user cancelled a tile highlight mode that has been set.
 774          */
 775         virtual void OnPlaceObjectAbort() {}
 776
 777
 778         /**
 779          * The user is dragging over the map when the tile highlight mode
 780          * has been set.
 781          * @param userdata      data set by the function that started the selection
 782          * @param pt            the exact point on the map where the mouse is.
 783          * @return Whether the tile selection should be updated.
 784          */
 785         virtual bool OnPlaceDrag (int userdata, Point pt) { return true; }
 786
 787         /**
 788          * The user has dragged over the map when the tile highlight mode
 789          * has been set.
 790          * @param userdata      data set by the function that started the selection
 791          * @param pt            the exact point on the map where the mouse was released.
 792          * @param start_tile    the begin tile of the drag.
 793          * @param end_tile      the end tile of the drag.
 794          */
 795         virtual void OnPlaceMouseUp (int userdata, Point pt, TileIndex start_tile, TileIndex end_tile) {}
 796
 797         /**
 798          * The user moves over the map when a tile highlight mode has been set
 799          * when the special mouse mode has been set to 'PRESIZE' mode. An
 800          * example of this is the tile highlight for dock building.
 801          * @param tile  the tile on the map where the mouse is (in), start of selection (out)
 802          * @param tile2 the tile on the map where the mouse is (in), end of selection (out)
 803          */
 804         virtual void OnPlacePresize (TileIndex *tile, TileIndex *tile2) {}
 805
 806         /*** End of the event handling ***/
 807
 808         /**
 809          * Is the data related to this window NewGRF inspectable?
 810          * @return true iff it is inspectable.
 811          */
 812         virtual bool IsNewGRFInspectable() const { return false; }
 813
 814         /**
 815          * Show the NewGRF inspection window. When this function is called it is
 816          * up to the window to call and pass the right parameters to the
 817          * ShowInspectWindow function.
 818          * @pre this->IsNewGRFInspectable()
 819          */
 820         virtual void ShowNewGRFInspectWindow() const { NOT_REACHED(); }
 821 };
 822
 823 /**
 824  * Get the nested widget with number \a widnum from the nested widget tree.
 825  * @tparam NWID Type of the nested widget.
 826  * @param widnum Widget number of the widget to retrieve.
 827  * @return The requested widget if it is instantiated, \c NULL otherwise.
 828  */
 829 template <class NWID>
 830 inline NWID *Window::GetWidget(uint widnum)
 831 {
 832         if (widnum >= this->nested_array_size || this->nested_array[widnum] == NULL) return NULL;
 833         NWID *nwid = dynamic_cast<NWID *>(this->nested_array[widnum]);
 834         assert(nwid != NULL);
 835         return nwid;
 836 }
 837
 838 /** Specialized case of #Window::GetWidget for the nested widget base class. */
 839 template <>
 840 inline const NWidgetBase *Window::GetWidget<NWidgetBase>(uint widnum) const
 841 {
 842         if (widnum >= this->nested_array_size) return NULL;
 843         return this->nested_array[widnum];
 844 }
 845
 846 /**
 847  * Get the nested widget with number \a widnum from the nested widget tree.
 848  * @tparam NWID Type of the nested widget.
 849  * @param widnum Widget number of the widget to retrieve.
 850  * @return The requested widget if it is instantiated, \c NULL otherwise.
 851  */
 852 template <class NWID>
 853 inline const NWID *Window::GetWidget(uint widnum) const
 854 {
 855         return const_cast<Window *>(this)->GetWidget<NWID>(widnum);
 856 }
 857
 858
 859 /**
 860  * Base class for windows opened from a toolbar.
 861  */
 862 class PickerWindowBase : public Window {
 863
 864 public:
 865         PickerWindowBase (const WindowDesc *desc, Window *parent)
 866                 : Window(desc)
 867         {
 868                 this->parent = parent;
 869         }
 870
 871         void OnDelete (void) OVERRIDE;
 872 };
 873
 874 Window *BringWindowToFrontById(WindowClass cls, WindowNumber number);
 875 Window *FindWindowFromPt(int x, int y);
 876
 877 /**
 878  * Open a new window.
 879  * @tparam Wcls %Window class to use if the window does not exist.
 880  * @param desc The pointer to the WindowDesc to be created
 881  * @param window_number the window number of the new window
 882  * @param return_existing If set, also return the window if it already existed.
 883  * @return %Window pointer of the newly created window, or the existing one if \a return_existing is set, or \c NULL.
 884  */
 885 template <typename Wcls>
 886 Wcls *AllocateWindowDescFront (const WindowDesc *desc, int window_number, bool return_existing = false)
 887 {
 888         Wcls *w = static_cast<Wcls *>(BringWindowToFrontById(desc->cls, window_number));
 889         if (w != NULL) return return_existing ? w : NULL;
 890         return new Wcls(desc, window_number);
 891 }
 892
 893 void RelocateAllWindows(int neww, int newh);
 894
 895 /* misc_gui.cpp */
 896 enum TooltipCloseCondition {
 897         TCC_RIGHT_CLICK,
 898         TCC_LEFT_CLICK,
 899         TCC_HOVER,
 900 };
 901
 902 void GuiShowTooltips(Window *parent, StringID str, uint paramcount = 0, const uint64 params[] = NULL, TooltipCloseCondition close_tooltip = TCC_HOVER);
 903
 904 /* widget.cpp */
 905 int GetWidgetFromPos(const Window *w, int x, int y);
 906
 907 /** Iterate over all windows */
 908 #define FOR_ALL_WINDOWS_FROM_BACK_FROM(w, start)  for (w = start; w != NULL; w = w->z_front) if (w->window_class != WC_INVALID)
 909 #define FOR_ALL_WINDOWS_FROM_FRONT_FROM(w, start) for (w = start; w != NULL; w = w->z_back) if (w->window_class != WC_INVALID)
 910 #define FOR_ALL_WINDOWS_FROM_BACK(w)  FOR_ALL_WINDOWS_FROM_BACK_FROM(w, _z_back_window)
 911 #define FOR_ALL_WINDOWS_FROM_FRONT(w) FOR_ALL_WINDOWS_FROM_FRONT_FROM(w, _z_front_window)
 912
 913 extern Point _cursorpos_drag_start;
 914
 915 extern int _scrollbar_start_pos;
 916 extern int _scrollbar_size;
 917 extern byte _scroller_click_timeout;
 918
 919 extern bool _scrolling_viewport;
 920 extern bool _mouse_hovering;
 921
 922 /** Pointer modes. */
 923 enum PointerMode {
 924         POINTER_NONE,      ///< Normal pointer mode.
 925         POINTER_TILE,      ///< Highlight the tile under the pointer.
 926         POINTER_CORNER,    ///< Highlight the corner under the pointer.
 927         POINTER_AREA,      ///< Highlight a custom tile area (docks, tunnels).
 928         POINTER_RAIL_X,    ///< Rail construction highlighting, X axis.
 929         POINTER_RAIL_Y,    ///< Rail construction highlighting, Y axis.
 930         POINTER_RAIL_H,    ///< Rail construction highlighting, horizontal.
 931         POINTER_RAIL_V,    ///< Rail construction highlighting, vertical.
 932         POINTER_RAIL_AUTO, ///< Autorail highlighting.
 933         POINTER_DRAG,      ///< Drag a vehicle.
 934         POINTER_VEHICLE,      ///< Normal pointer mode, but allow to select a vehicle.
 935         POINTER_TILE_VEHICLE, ///< Highlight the tile under the pointer and allow to select a vehicle.
 936
 937         POINTER_RAIL_FIRST = POINTER_RAIL_X,
 938         POINTER_RAIL_LAST  = POINTER_RAIL_AUTO,
 939 };
 940 extern PointerMode _pointer_mode;
 941
 942 void SetFocusedWindow(Window *w);
 943
 944 void ScrollbarClickHandler(Window *w, NWidgetCore *nw, int x, int y);
 945
 946 #endif /* WINDOW_GUI_H */