viewport.cpp File Reference

Handling of all viewports. More...

#include "stdafx.h"
#include "openttd.h"
#include "landscape.h"
#include "viewport_func.h"
#include "station_base.h"
#include "town.h"
#include "signs_base.h"
#include "signs_func.h"
#include "variables.h"
#include "vehicle_base.h"
#include "vehicle_gui.h"
#include "blitter/factory.hpp"
#include "transparency.h"
#include "strings_func.h"
#include "zoom_func.h"
#include "vehicle_func.h"
#include "company_func.h"
#include "station_func.h"
#include "window_func.h"
#include "tilehighlight_func.h"
#include "window_gui.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "table/autorail.h"
#include "table/animcursors.h"

Go to the source code of this file.

Data Structures

struct  StringSpriteToDraw
struct  TileSpriteToDraw
struct  ChildScreenSpriteToDraw
struct  ParentSpriteToDraw
 Parent sprite that should be drawn. More...
struct  ViewportDrawer
 Data structure storing rendering information. More...

Typedefs

typedef SmallVector
< TileSpriteToDraw, 64 > 
TileSpriteToDrawVector
typedef SmallVector
< StringSpriteToDraw, 4 > 
StringSpriteToDrawVector
typedef SmallVector
< ParentSpriteToDraw, 64 > 
ParentSpriteToDrawVector
typedef SmallVector
< ParentSpriteToDraw *, 64 > 
ParentSpriteToSortVector
typedef SmallVector
< ChildScreenSpriteToDraw, 16 > 
ChildScreenSpriteToDrawVector

Enumerations

enum  FoundationPart { FOUNDATION_PART_NONE = 0xFF, FOUNDATION_PART_NORMAL = 0, FOUNDATION_PART_HALFTILE = 1, FOUNDATION_PART_END }
 Enumeration of multi-part foundations. More...

Functions

static Point MapXYZToViewport (const ViewPort *vp, int x, int y, int z)
void DeleteWindowViewport (Window *w)
void InitializeWindowViewport (Window *w, int x, int y, int width, int height, uint32 follow_flags, ZoomLevel zoom)
 Initialize viewport of the window for use.
static void DoSetViewportPosition (const Window *w, int left, int top, int width, int height)
static void SetViewportPosition (Window *w, int x, int y)
ViewPortIsPtInWindowViewport (const Window *w, int x, int y)
 Is a xy position inside the viewport of the window?
static Point TranslateXYToTileCoord (const ViewPort *vp, int x, int y)
 Translate screen coordinate in a viewport to a tile coordinate.
static Point GetTileFromScreenXY (int x, int y, int zoom_x, int zoom_y)
Point GetTileBelowCursor ()
Point GetTileZoomCenterWindow (bool in, Window *w)
void HandleZoomMessage (Window *w, const ViewPort *vp, byte widget_zoom_in, byte widget_zoom_out)
 Update the status of the zoom-buttons according to the zoom-level of the viewport.
void DrawGroundSpriteAt (SpriteID image, SpriteID pal, int32 x, int32 y, byte z, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
 Draws a ground sprite at a specific world-coordinate.
static void AddChildSpriteToFoundation (SpriteID image, SpriteID pal, const SubSprite *sub, FoundationPart foundation_part, int extra_offs_x, int extra_offs_y)
 Adds a child sprite to the active foundation.
void DrawGroundSprite (SpriteID image, SpriteID pal, const SubSprite *sub, int extra_offs_x, int extra_offs_y)
 Draws a ground sprite for the current tile.
void OffsetGroundSprite (int x, int y)
 Called when a foundation has been drawn for the current tile.
static void AddCombinedSprite (SpriteID image, SpriteID pal, int x, int y, byte z, const SubSprite *sub)
 Adds a child sprite to a parent sprite.
void AddSortableSpriteToDraw (SpriteID image, SpriteID pal, int x, int y, int w, int h, int dz, int z, bool transparent, int bb_offset_x, int bb_offset_y, int bb_offset_z, const SubSprite *sub)
 Draw a (transparent) sprite at given coordinates with a given bounding box.
void StartSpriteCombine ()
void EndSpriteCombine ()
void AddChildSpriteScreen (SpriteID image, SpriteID pal, int x, int y, bool transparent, const SubSprite *sub)
 Add a child sprite to a parent sprite.
void AddStringToDraw (int x, int y, StringID string, uint64 params_1, uint64 params_2, uint16 colour, uint16 width)
static void DrawSelectionSprite (SpriteID image, SpriteID pal, const TileInfo *ti, int z_offset, FoundationPart foundation_part)
 Draws sprites between ground sprite and everything above.
static void DrawTileSelectionRect (const TileInfo *ti, SpriteID pal)
 Draws a selection rectangle on a tile.
static bool IsPartOfAutoLine (int px, int py)
static void DrawAutorailSelection (const TileInfo *ti, uint autorail_type)
 Draws autorail highlights.
static void DrawTileSelection (const TileInfo *ti)
 Checks if the specified tile is selected and if so draws selection using correct selectionstyle.
static void ViewportAddLandscape ()
static void ViewportAddTownNames (DrawPixelInfo *dpi)
static void AddStation (const Station *st, StringID str, uint16 width)
static void ViewportAddStationNames (DrawPixelInfo *dpi)
static void AddSign (const Sign *si, StringID str, uint16 width)
static void ViewportAddSigns (DrawPixelInfo *dpi)
static void AddWaypoint (const Waypoint *wp, StringID str, uint16 width)
static void ViewportAddWaypoints (DrawPixelInfo *dpi)
void UpdateViewportSignPos (ViewportSign *sign, int left, int top, StringID str)
static void ViewportDrawTileSprites (const TileSpriteToDrawVector *tstdv)
static void ViewportSortParentSprites (ParentSpriteToSortVector *psdv)
 Sort parent sprites pointer array.
static void ViewportDrawParentSprites (const ParentSpriteToSortVector *psd, const ChildScreenSpriteToDrawVector *csstdv)
static void ViewportDrawBoundingBoxes (const ParentSpriteToSortVector *psd)
 Draws the bounding boxes of all ParentSprites.
static void ViewportDrawStrings (DrawPixelInfo *dpi, const StringSpriteToDrawVector *sstdv)
void ViewportDoDraw (const ViewPort *vp, int left, int top, int right, int bottom)
static void ViewportDrawChk (const ViewPort *vp, int left, int top, int right, int bottom)
 Make sure we don't draw a too big area at a time.
static void ViewportDraw (const ViewPort *vp, int left, int top, int right, int bottom)
static void ClampViewportToMap (const ViewPort *vp, int &x, int &y)
void UpdateViewportPosition (Window *w)
static void MarkViewportDirty (const ViewPort *vp, int left, int top, int right, int bottom)
 Marks a viewport as dirty for repaint if it displays (a part of) the area the needs to be repainted.
void MarkAllViewportsDirty (int left, int top, int right, int bottom)
 Mark all viewports dirty for repaint.
void MarkTileDirtyByTile (TileIndex tile)
 Mark a tile given by its index dirty for repaint.
void MarkTileDirty (int x, int y)
 Mark a tile given by its coordinate dirty for repaint.
static void SetSelectionTilesDirty ()
 Marks the selected tiles as dirty.
void SetSelectionRed (bool b)
static bool CheckClickOnTown (const ViewPort *vp, int x, int y)
static bool CheckClickOnStation (const ViewPort *vp, int x, int y)
static bool CheckClickOnSign (const ViewPort *vp, int x, int y)
static bool CheckClickOnWaypoint (const ViewPort *vp, int x, int y)
static bool CheckClickOnLandscape (const ViewPort *vp, int x, int y)
bool HandleViewportClicked (const ViewPort *vp, int x, int y)
Vehicle * CheckMouseOverVehicle ()
void PlaceObject ()
bool ScrollWindowTo (int x, int y, int z, Window *w, bool instant)
bool ScrollMainWindowToTile (TileIndex tile, bool instant)
void SetRedErrorSquare (TileIndex tile)
void SetTileSelectSize (int w, int h)
void SetTileSelectBigSize (int ox, int oy, int sx, int sy)
static HighLightStyle GetAutorailHT (int x, int y)
 returns the best autorail highlight type from map coordinates
void UpdateTileSelection ()
 Updates tile highlighting for all cases.
static void ShowMeasurementTooltips (StringID str, uint paramcount, const uint64 params[])
 Displays the measurement tooltips when selecting multiple tiles.
void VpStartPlaceSizing (TileIndex tile, ViewportPlaceMethod method, ViewportDragDropSelectionProcess process)
 highlighting tiles while only going over them with the mouse
void VpSetPlaceSizingLimit (int limit)
void VpSetPresizeRange (TileIndex from, TileIndex to)
 Highlights all tiles between a set of two tiles.
static void VpStartPreSizing ()
static HighLightStyle Check2x1AutoRail (int mode)
 returns information about the 2x1 piece to be build.
static bool SwapDirection (HighLightStyle style, TileIndex start_tile, TileIndex end_tile)
 Check if the direction of start and end tile should be swapped based on the dragging-style.
static int CalcHeightdiff (HighLightStyle style, uint distance, TileIndex start_tile, TileIndex end_tile)
 Calculates height difference between one tile and another Multiplies the result to suit the standard given by minimap - 50 meters high To correctly get the height difference we need the direction we are dragging in, as well as with what kind of tool we are dragging.
static void CalcRaildirsDrawstyle (TileHighlightData *thd, int x, int y, int method)
 while dragging
void VpSelectTilesWithMethod (int x, int y, ViewportPlaceMethod method)
 Selects tiles while dragging.
bool VpHandlePlaceSizingDrag ()
 Handle the mouse while dragging for placement/resizing.
void SetObjectToPlaceWnd (CursorID icon, SpriteID pal, ViewportHighlightMode mode, Window *w)
void SetObjectToPlace (CursorID icon, SpriteID pal, ViewportHighlightMode mode, WindowClass window_class, WindowNumber window_num)
void ResetObjectToPlace ()

Variables

PlaceProc * _place_proc
Point _tile_fract_coords
ZoomLevel _saved_scrollpos_zoom
static ViewportDrawer _vd
TileHighlightData _thd
static TileInfo_cur_ti
bool _draw_bounding_boxes = false
static Point _vp_move_offs
static const HighLightStyle _autorail_type [6][2]
static const StringID measure_strings_length [] = {STR_NULL, STR_MEASURE_LENGTH, STR_MEASURE_LENGTH_HEIGHTDIFF}


Detailed Description

Handling of all viewports.

 * The in-game coordinate system looks like this *
 *                                               *
 *                    ^ Z                        *
 *                    |                          *
 *                    |                          *
 *                    |                          *
 *                    |                          *
 *                 /     \                       *
 *              /           \                    *
 *           /                 \                 *
 *        /                       \              *
 *   X <                             > Y         *
 * 

Definition in file viewport.cpp.


Enumeration Type Documentation

Enumeration of multi-part foundations.

Enumerator:
FOUNDATION_PART_NONE  Neither foundation nor groundsprite drawn yet.
FOUNDATION_PART_NORMAL  First part (normal foundation or no foundation).
FOUNDATION_PART_HALFTILE  Second part (halftile foundation).

Definition at line 100 of file viewport.cpp.


Function Documentation

void AddChildSpriteScreen ( SpriteID  image,
SpriteID  pal,
int  x,
int  y,
bool  transparent,
const SubSprite sub 
)

Add a child sprite to a parent sprite.

Parameters:
image the image to draw.
pal the provided palette.
x sprite x-offset (screen coordinates) relative to parent sprite.
y sprite y-offset (screen coordinates) relative to parent sprite.
transparent if true, switch the palette between the provided palette and the transparent palette,
sub Only draw a part of the sprite.

Definition at line 707 of file viewport.cpp.

References SmallVector< T, S >::Append(), ViewportDrawer::child_screen_sprites_to_draw, ViewportDrawer::last_child, ViewportDrawer::last_foundation_child, SmallVector< T, S >::Length(), MAX_SPRITES, PALETTE_MODIFIER_TRANSPARENT, SetBit(), and SPRITE_MASK.

Referenced by AddChildSpriteToFoundation(), and AddCombinedSprite().

static void AddChildSpriteToFoundation ( SpriteID  image,
SpriteID  pal,
const SubSprite sub,
FoundationPart  foundation_part,
int  extra_offs_x,
int  extra_offs_y 
) [static]

Adds a child sprite to the active foundation.

The pixel offset of the sprite relative to the ParentSprite is the sum of the offset passed to OffsetGroundSprite() and extra_offs_?.

Parameters:
image the image to draw.
pal the provided palette.
sub Only draw a part of the sprite.
foundation_part Foundation part.
extra_offs_x Pixel X offset for the sprite position.
extra_offs_y Pixel Y offset for the sprite position.

Definition at line 491 of file viewport.cpp.

References AddChildSpriteScreen(), ViewportDrawer::foundation, ViewportDrawer::foundation_offset, IsInsideMM(), ViewportDrawer::last_child, ViewportDrawer::last_foundation_child, Point::x, and Point::y.

Referenced by DrawGroundSprite(), and DrawSelectionSprite().

static void AddCombinedSprite ( SpriteID  image,
SpriteID  pal,
int  x,
int  y,
byte  z,
const SubSprite sub 
) [static]

Adds a child sprite to a parent sprite.

In contrast to "AddChildSpriteScreen()" the sprite position is in world coordinates

Parameters:
image the image to draw.
pal the provided palette.
x position x of the sprite.
y position y of the sprite.
z position z of the sprite.
sub Only draw a part of the sprite.

Definition at line 569 of file viewport.cpp.

References AddChildSpriteScreen(), ViewportDrawer::dpi, SmallVector< T, S >::End(), ParentSpriteToDraw::left, ViewportDrawer::parent_sprites_to_draw, SPRITE_MASK, ST_NORMAL, ParentSpriteToDraw::top, Point::x, and Point::y.

Referenced by AddSortableSpriteToDraw().

void AddSortableSpriteToDraw ( SpriteID  image,
SpriteID  pal,
int  x,
int  y,
int  w,
int  h,
int  dz,
int  z,
bool  transparent,
int  bb_offset_x,
int  bb_offset_y,
int  bb_offset_z,
const SubSprite sub 
)

Draw a (transparent) sprite at given coordinates with a given bounding box.

The bounding box extends from (x + bb_offset_x, y + bb_offset_y, z + bb_offset_z) to (x + w - 1, y + h - 1, z + dz - 1), both corners included. Bounding boxes with bb_offset_x == w or bb_offset_y == h or bb_offset_z == dz are allowed and produce thin slices.

Note:
Bounding boxes are normally specified with bb_offset_x = bb_offset_y = bb_offset_z = 0. The extent of the bounding box in negative direction is defined by the sprite offset in the grf file. However if modifying the sprite offsets is not suitable (e.g. when using existing graphics), the bounding box can be tuned by bb_offset.
Precondition:
w >= bb_offset_x, h >= bb_offset_y, dz >= bb_offset_z. Else w, h or dz are ignored.
Parameters:
image the image to combine and draw,
pal the provided palette,
x position X (world) of the sprite,
y position Y (world) of the sprite,
w bounding box extent towards positive X (world),
h bounding box extent towards positive Y (world),
dz bounding box extent towards positive Z (world),
z position Z (world) of the sprite,
transparent if true, switch the palette between the provided palette and the transparent palette,
bb_offset_x bounding box extent towards negative X (world),
bb_offset_y bounding box extent towards negative Y (world),
bb_offset_z bounding box extent towards negative Z (world)
sub Only draw a part of the sprite.

Definition at line 608 of file viewport.cpp.

References AddCombinedSprite(), SmallVector< T, S >::Append(), ViewportDrawer::combine_sprites, ParentSpriteToDraw::comparison_done, ViewportDrawer::dpi, ParentSpriteToDraw::first_child, ParentSpriteToDraw::image, ViewportDrawer::last_child, ParentSpriteToDraw::left, max(), MAX_SPRITES, min(), ParentSpriteToDraw::pal, PALETTE_MODIFIER_TRANSPARENT, ViewportDrawer::parent_sprites_to_draw, SetBit(), SPRITE_MASK, ST_NORMAL, ParentSpriteToDraw::sub, ParentSpriteToDraw::top, ParentSpriteToDraw::x, Point::x, ParentSpriteToDraw::xmax, ParentSpriteToDraw::xmin, ParentSpriteToDraw::y, Point::y, ParentSpriteToDraw::ymax, ParentSpriteToDraw::ymin, ParentSpriteToDraw::zmax, and ParentSpriteToDraw::zmin.

Referenced by DrawBridgePillars(), DrawBridgeTramBits(), DrawCatenary(), DrawCatenaryOnTunnel(), DrawCatenaryRailway(), DrawFoundation(), DrawRoadDetail(), DrawTile_Road(), DrawTile_Town(), DrawTile_TunnelBridge(), DrawTrackFence_NS_1(), DrawTrackFence_NS_2(), DrawTrackFence_WE_1(), DrawTrackFence_WE_2(), and DrawTramCatenary().

static int CalcHeightdiff ( HighLightStyle  style,
uint  distance,
TileIndex  start_tile,
TileIndex  end_tile 
) [static]

Calculates height difference between one tile and another Multiplies the result to suit the standard given by minimap - 50 meters high To correctly get the height difference we need the direction we are dragging in, as well as with what kind of tool we are dragging.

For example a horizontal autorail tool that starts in bottom and ends at the top of a tile will need the maximum of SW, S and SE, N corners respectively. This is handled by the lookup table below See _tileoffs_by_dir in map.c for the direction enums if you can't figure out the values yourself.

Parameters:
style HightlightStyle of drag. This includes direction and style (autorail, rect, etc.)
distance amount of tiles dragged, important for horizontal/vertical drags ignored for others
start_tile,end_tile start and end tile of drag operation
Returns:
height difference between two tiles. Tile measurement tool utilizes this value in its tooltips

Definition at line 2358 of file viewport.cpp.

References HT_DIR_HL, HT_DIR_HU, HT_DIR_MASK, HT_DIR_VL, HT_DIR_VR, HT_DIR_X, HT_DIR_Y, HT_DRAG_MASK, lengthof, max(), Swap(), SwapDirection(), TILE_ADD, TileHeight(), TileX(), and ToTileIndexDiff().

Referenced by CalcRaildirsDrawstyle(), and VpSelectTilesWithMethod().

static HighLightStyle Check2x1AutoRail ( int  mode  )  [static]

returns information about the 2x1 piece to be build.

The lower bits (0-3) are the track type.

Definition at line 2283 of file viewport.cpp.

References HT_DIR_HL, HT_DIR_HU, HT_DIR_VL, HT_DIR_VR, HT_DIR_X, HT_DIR_Y, Point::x, and Point::y.

Referenced by CalcRaildirsDrawstyle().

static void DrawAutorailSelection ( const TileInfo ti,
uint  autorail_type 
) [static]

Draws autorail highlights.

Parameters:
*ti TileInfo Tile that is being drawn
autorail_type Offset into _AutorailTilehSprite[][]

Definition at line 841 of file viewport.cpp.

References DrawSelectionSprite(), FOUNDATION_PART_HALFTILE, FOUNDATION_PART_NORMAL, GetHalftileSlopeCorner(), IsHalftileSlope(), OppositeCorner(), PALETTE_SEL_TILE_RED, RemoveHalftileSlope(), SlopeWithThreeCornersRaised(), and TileInfo::tileh.

Referenced by DrawTileSelection().

void DrawGroundSprite ( SpriteID  image,
SpriteID  pal,
const SubSprite sub,
int  extra_offs_x,
int  extra_offs_y 
)

Draws a ground sprite for the current tile.

If the current tile is drawn on top of a foundation the sprite is added as child sprite to the "foundation"-ParentSprite.

Parameters:
image the image to draw.
pal the provided palette.
sub Only draw a part of the sprite.
extra_offs_x Pixel X offset for the sprite position.
extra_offs_y Pixel Y offset for the sprite position.

Definition at line 517 of file viewport.cpp.

References AddChildSpriteToFoundation(), DrawGroundSpriteAt(), ViewportDrawer::foundation, ViewportDrawer::foundation_part, FOUNDATION_PART_NONE, FOUNDATION_PART_NORMAL, TileInfo::x, TileInfo::y, and TileInfo::z.

Referenced by DrawCanalWater(), DrawRoadBits(), DrawSeaWater(), DrawTile_Road(), DrawTile_Town(), DrawTile_TunnelBridge(), and DrawTrackBits().

void DrawGroundSpriteAt ( SpriteID  image,
SpriteID  pal,
int32  x,
int32  y,
byte  z,
const SubSprite sub,
int  extra_offs_x,
int  extra_offs_y 
)

Draws a ground sprite at a specific world-coordinate.

Parameters:
image the image to draw.
pal the provided palette.
x position x (world coordinates) of the sprite.
y position y (world coordinates) of the sprite.
z position z (world coordinates) of the sprite.
sub Only draw a part of the sprite.
extra_offs_x Pixel X offset for the sprite position.
extra_offs_y Pixel Y offset for the sprite position.

Definition at line 466 of file viewport.cpp.

References SmallVector< T, S >::Append(), MAX_SPRITES, SPRITE_MASK, ViewportDrawer::tile_sprites_to_draw, Point::x, and Point::y.

Referenced by DrawGroundSprite(), and DrawSelectionSprite().

static void DrawSelectionSprite ( SpriteID  image,
SpriteID  pal,
const TileInfo ti,
int  z_offset,
FoundationPart  foundation_part 
) [static]

Draws sprites between ground sprite and everything above.

The sprite is either drawn as TileSprite or as ChildSprite of the active foundation.

Parameters:
image the image to draw.
pal the provided palette.
ti TileInfo Tile that is being drawn
z_offset Z offset relative to the groundsprite. Only used for the sprite position, not for sprite sorting.
foundation_part Foundation part the sprite belongs to.

Definition at line 763 of file viewport.cpp.

References AddChildSpriteToFoundation(), DrawGroundSpriteAt(), ViewportDrawer::foundation, TileInfo::x, TileInfo::y, and TileInfo::z.

Referenced by DrawAutorailSelection(), DrawTileSelection(), and DrawTileSelectionRect().

static void DrawTileSelection ( const TileInfo ti  )  [static]

static void DrawTileSelectionRect ( const TileInfo ti,
SpriteID  pal 
) [static]

Draws a selection rectangle on a tile.

Parameters:
ti TileInfo Tile that is being drawn
pal Palette to apply.

Definition at line 781 of file viewport.cpp.

References DrawSelectionSprite(), FOUNDATION_PART_HALFTILE, FOUNDATION_PART_NORMAL, GetHalftileSlopeCorner(), IsHalftileSlope(), IsSteepSlope(), IsValidTile(), OppositeCorner(), SlopeWithOneCornerRaised(), TileInfo::tile, TILE_HEIGHT, and TileInfo::tileh.

Referenced by DrawTileSelection().

void HandleZoomMessage ( Window w,
const ViewPort vp,
byte  widget_zoom_in,
byte  widget_zoom_out 
)

Update the status of the zoom-buttons according to the zoom-level of the viewport.

This will update their status and invalidate accordingly

Parameters:
w Window pointer to the window that has the zoom buttons
vp pointer to the viewport whose zoom-level the buttons represent
widget_zoom_in widget index for window with zoom-in button
widget_zoom_out widget index for window with zoom-out button

Definition at line 444 of file viewport.cpp.

References Window::InvalidateWidget(), Window::SetWidgetDisabledState(), and ViewPort::zoom.

void InitializeWindowViewport ( Window w,
int  x,
int  y,
int  width,
int  height,
uint32  follow_flags,
ZoomLevel  zoom 
)

Initialize viewport of the window for use.

Parameters:
w Window to use/display the viewport in
x Offset of left edge of viewport with respect to left edge window w
y Offset of top edge of viewport with respect to top edge window w
width Width of the viewport
height Height of the viewport
follow_flags Flags controlling the viewport.
  • If bit 31 is set, the lower 16 bits are the vehicle that the viewport should follow.
  • If bit 31 is clear, it is a tile position.
zoom Zoomlevel to display

Definition at line 165 of file viewport.cpp.

References ViewportData::dest_scrollpos_x, ViewportData::dest_scrollpos_y, ViewportData::follow_vehicle, ViewPort::height, Window::left, ViewPort::left, ScaleByZoom(), ViewportData::scrollpos_x, ViewportData::scrollpos_y, TILE_SIZE, TileX(), TileY(), Window::top, ViewPort::top, Window::viewport, ViewPort::virtual_height, ViewPort::virtual_left, ViewPort::virtual_top, ViewPort::virtual_width, ViewPort::width, Point::x, Point::y, and ViewPort::zoom.

Referenced by ShowNewspaper().

ViewPort* IsPtInWindowViewport ( const Window w,
int  x,
int  y 
)

Is a xy position inside the viewport of the window?

Parameters:
w Window to examine its viewport
x X coordinate of the xy position
y Y coordinate of the xy position
Returns:
Pointer to the viewport if the xy position is in the viewport of the window, otherwise NULL is returned.

Definition at line 336 of file viewport.cpp.

References ViewPort::height, IsInsideMM(), ViewPort::left, ViewPort::top, Window::viewport, and ViewPort::width.

Referenced by HandleAutoscroll().

void OffsetGroundSprite ( int  x,
int  y 
)

Called when a foundation has been drawn for the current tile.

Successive ground sprites for the current tile will be drawn as child sprites of the "foundation"-ParentSprite, not as TileSprites.

Parameters:
x sprite x-offset (screen coordinates) of ground sprites relative to the "foundation"-ParentSprite.
y sprite y-offset (screen coordinates) of ground sprites relative to the "foundation"-ParentSprite.

Definition at line 537 of file viewport.cpp.

References ViewportDrawer::foundation, ViewportDrawer::foundation_offset, ViewportDrawer::foundation_part, FOUNDATION_PART_HALFTILE, FOUNDATION_PART_NONE, FOUNDATION_PART_NORMAL, ViewportDrawer::last_child, ViewportDrawer::last_foundation_child, SmallVector< T, S >::Length(), ViewportDrawer::parent_sprites_to_draw, Point::x, and Point::y.

Referenced by DrawFoundation().

static void ShowMeasurementTooltips ( StringID  str,
uint  paramcount,
const uint64  params[] 
) [inline, static]

Displays the measurement tooltips when selecting multiple tiles.

Parameters:
str String to be displayed
paramcount number of params to deal with
params (optional) up to 5 pieces of additional information that may be added to a tooltip

Definition at line 2213 of file viewport.cpp.

References _settings_client, ClientSettings::gui, GuiShowTooltips(), and GUISettings::measure_tooltip.

Referenced by CalcRaildirsDrawstyle(), VpSelectTilesWithMethod(), and VpSetPresizeRange().

static bool SwapDirection ( HighLightStyle  style,
TileIndex  start_tile,
TileIndex  end_tile 
) [static]

Check if the direction of start and end tile should be swapped based on the dragging-style.

Default directions are: in the case of a line (HT_RAIL, HT_LINE): DIR_NE, DIR_NW, DIR_N, DIR_E in the case of a rect (HT_RECT, HT_POINT): DIR_S, DIR_E For example dragging a rectangle area from south to north should be swapped to north-south (DIR_S) to obtain the same results with less code. This is what the return value signifies.

Parameters:
style HighLightStyle dragging style
start_tile start tile of drag
end_tile end tile of drag
Returns:
boolean value which when true means start/end should be swapped

Definition at line 2325 of file viewport.cpp.

References HT_DRAG_MASK, HT_LINE, HT_RAIL, TileX(), and TileY().

Referenced by CalcHeightdiff().

static Point TranslateXYToTileCoord ( const ViewPort vp,
int  x,
int  y 
) [static]

Translate screen coordinate in a viewport to a tile coordinate.

Parameters:
vp Viewport that contains the (x, y) screen coordinate
x Screen x coordinate
y Screen y coordinate
Returns:
Tile coordinate

Definition at line 354 of file viewport.cpp.

References _settings_game, Clamp(), GameSettings::construction, ConstructionSettings::freeform_edges, ViewPort::height, ViewPort::left, MapMaxX(), MapMaxY(), max(), ScaleByZoom(), TILE_SIZE, ViewPort::top, ViewPort::virtual_left, ViewPort::virtual_top, ViewPort::width, Point::x, Point::y, and ViewPort::zoom.

void UpdateTileSelection (  ) 

Updates tile highlighting for all cases.

Uses _thd.selstart and _thd.selend and _thd.place_mode (set elsewhere) to determine _thd.pos and _thd.size Also drawstyle is determined. Uses _thd.new.* as a buffer and calls SetSelectionTilesDirty() twice, Once for the old and once for the new selection. _thd is TileHighlightData, found in viewport.h

Definition at line 2138 of file viewport.cpp.

References GetAutorailHT(), SetSelectionTilesDirty(), Swap(), TILE_SIZE, VHM_NONE, VHM_POINT, VHM_RAIL, VHM_RECT, VHM_SPECIAL, Point::x, and Point::y.

Referenced by StationJoinerNeeded().

static void ViewportDrawBoundingBoxes ( const ParentSpriteToSortVector psd  )  [static]

static void ViewportDrawChk ( const ViewPort vp,
int  left,
int  top,
int  right,
int  bottom 
) [static]

Make sure we don't draw a too big area at a time.

If we do, the sprite memory will overflow.

Definition at line 1526 of file viewport.cpp.

References ViewPort::left, ScaleByZoom(), ViewPort::top, ViewPort::virtual_left, ViewPort::virtual_top, and ViewPort::zoom.

bool VpHandlePlaceSizingDrag (  ) 

Handle the mouse while dragging for placement/resizing.

Returns:
Boolean whether search for a handler should continue

Definition at line 2688 of file viewport.cpp.

References _left_button_down, FindWindowById(), HT_LINE, HT_RAIL, Window::OnPlaceDrag(), Window::OnPlaceMouseUp(), VHM_POINT, VHM_RAIL, VHM_RECT, and VPM_SIGNALDIRS.

void VpSelectTilesWithMethod ( int  x,
int  y,
ViewportPlaceMethod  method 
)

Selects tiles while dragging.

Parameters:
x X coordinate of end of selection
y Y coordinate of end of selection
method modifies the way tiles are selected. Possible methods are VPM_* in viewport.h

Definition at line 2567 of file viewport.cpp.

References _settings_client, abs(), CalcHeightdiff(), CalcRaildirsDrawstyle(), Clamp(), Delta(), DistanceManhattan(), ClientSettings::gui, HT_DIR_X, HT_DIR_Y, HT_LINE, GUISettings::measure_tooltip, ShowMeasurementTooltips(), TILE_SIZE, TileX(), TileY(), VPM_FIX_X, VPM_FIX_Y, VPM_RAILDIRS, VPM_SIGNALDIRS, VPM_X_AND_Y, VPM_X_AND_Y_LIMITED, and VPM_X_OR_Y.

Referenced by BuildRailToolbarWindow::OnPlaceDrag().

void VpSetPresizeRange ( TileIndex  from,
TileIndex  to 
)

Highlights all tiles between a set of two tiles.

Used in dock and tunnel placement

Parameters:
from TileIndex of the first tile to highlight
to TileIndex of the last tile to highlight

Definition at line 2261 of file viewport.cpp.

References DistanceManhattan(), ShowMeasurementTooltips(), TILE_SIZE, TileX(), and TileY().

Referenced by BuildRailToolbarWindow::OnPlacePresize().


Variable Documentation

const HighLightStyle _autorail_type[6][2] [static]

Initial value:

Definition at line 824 of file viewport.cpp.


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