Geometry

Section: Tk Themed Widget (3)
Updated: 8.5
Page Index

NAME

Ttk_MakeBox, Ttk_PadBox, Ttk_ExpandBox, Ttk_PackBox, Ttk_StickBox, Ttk_PlaceBox, Ttk_BoxContains, Ttk_MakePadding, Ttk_UniformPadding, Ttk_AddPadding, Ttk_RelievePadding, Ttk_GetPaddingFromObj, Ttk_GetBorderFromObj, Ttk_GetStickyFromObj - Tk themed geometry utilities

SYNOPSIS

#include <tkTheme.h>

Ttk_Box
Ttk_MakeBox(int x, int y, int width, int height);

Ttk_Box
Ttk_PadBox(Ttk_Box parcel, Ttk_Padding padding);

Ttk_Box
Ttk_ExpandBox(Ttk_Box parcel, Ttk_Padding padding);

Ttk_Box
Ttk_PackBox(Ttk_Box *cavity, int width, int height, Ttk_Side side);

Ttk_Box
Ttk_StickBox(Ttk_Box parcel, int width, int height, unsigned sticky);

Ttk_Box
Ttk_PlaceBox(Ttk_Box *cavity, int width, int height, Ttk_Side side, unsigned sticky);

Ttk_Box
Ttk_AnchorBox(Ttk_Box parcel, int width, int height, Tk_Anchor anchor);

Ttk_Padding
Ttk_MakePadding(short left, short top, short right, short bottom);

Ttk_Padding
Ttk_UniformPadding(short border);

Ttk_Padding
Ttk_AddPadding(Ttk_Padding padding1, Ttk_Padding padding2;

Ttk_Padding
Ttk_RelievePadding(Ttk_Padding padding, int relief);

int
Ttk_BoxContains(Ttk_Box box, int x, int y);

int
Ttk_GetPaddingFromObj(Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj *objPtr, Ttk_Padding *padding_rtn);

int
Ttk_GetBorderFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr, Ttk_Padding *padding_rtn);

int
Ttk_GetStickyFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr, int *sticky_rtn);

ARGUMENTS

Tk_Anchor anchor (in) One of the symbolic constants TK_ANCHOR_N, TK_ANCHOR_NE, etc. See Tk_GetAnchorFromObj(3).

Ttk_Box * cavity (in/out) A rectangular region from which a parcel is allocated.

short border (in) Extra padding (in pixels) to add uniformly to each side of a region.

short bottom (in) Extra padding (in pixels) to add to the bottom of a region.

Ttk_Box box (in)

Ttk_Box * box_rtn (out) Specifies a rectangular region.

int height (in) The height in pixels of a region.

Tcl_Interp * interp (in) Used to store error messages.

int left (in) Extra padding (in pixels) to add to the left side of a region.

Tcl_Obj * objPtr (in) String value contains a symbolic name to be converted to an enumerated value or bitmask. Internal rep may be be modified to cache corresponding value.

Ttk_Padding padding (in)

Ttk_Padding * padding_rtn (out) Extra padding to add on the inside of a region.

Ttk_Box parcel (in) A rectangular region, allocated from a cavity.

int relief (in) One of the standard Tk relief options (TK_RELIEF_RAISED, TK_RELIEF_SUNKEN, etc.). See Tk_GetReliefFromObj.

short right (in) Extra padding (in pixels) to add to the right side of a region.

Ttk_Side side (in) One of TTK_SIDE_LEFT, TTK_SIDE_TOP, TTK_SIDE_RIGHT, or TTK_SIDE_BOTTOM.

unsigned sticky (in) A bitmask containing one or more of the bits TTK_STICK_W (west, or left), TTK_STICK_E (east, or right, TTK_STICK_N (north, or top), and TTK_STICK_S (south, or bottom). TTK_FILL_X is defined as a synonym for (TTK_STICK_W|TTK_STICK_E), TTK_FILL_Y is a synonym for (TTK_STICK_N|TTK_STICK_S), and TTK_FILL_BOTH and TTK_STICK_ALL are synonyms for (TTK_FILL_X|TTK_FILL_Y). See also: grid(n).

Tk_Window tkwin (in) Window whose screen geometry determines the conversion between absolute units and pixels.

short top (in) Extra padding at the top of a region.

int width (in) The width in pixels of a region.

int x (in) X coordinate of upper-left corner of region.

int y (in) Y coordinate of upper-left corner of region.

BOXES

The Ttk_Box structure represents a rectangular region of a window:


typedef struct {
    int x;
    int y;
    int width;
    int height;
} Ttk_Box;

All coordinates are relative to the window.

Ttk_MakeBox is a convenience routine that constructs a Ttk_Box structure representing a region width pixels wide, height pixels tall, at the specified x, y coordinates.

Ttk_PadBox returns a new box located inside the specified parcel, shrunken according to the left, top, right, and bottom margins specified by padding.

Ttk_ExpandBox is the inverse of Ttk_PadBox: it returns a new box surrounding the specified parcel, expanded according to the left, top, right, and bottom margins specified by padding.

Ttk_PackBox allocates a parcel width by height pixels wide on the specified side of the cavity, and shrinks the cavity accordingly.

Ttk_StickBox places a box with the requested width and height inside the parcel according to the sticky bits.

Ttk_PlaceBox combines Ttk_PackBox and Ttk_StickBox: it allocates a parcel on the specified side of the cavity, places a box of the requested size inside the parcel according to sticky, and shrinks the cavity.

Ttk_AnchorBox places a box with the requested width and height inside the parcel according to the specified anchor option.

Ttk_BoxContains tests if the specified x, y coordinate lies within the rectangular region box.

PADDDING

The Ttk_Padding structure is used to represent borders, internal padding, and external margins:


typedef struct {
    short left;
    short top;
    short right;
    short bottom;
} Ttk_Padding;

Ttk_MakePadding is a convenience routine that constructs a Ttk_Padding structure with the specified left, top, right, and bottom components.

Ttk_UniformPadding constructs a Ttk_Padding structure with all components equal to the specified border.

Ttk_AddPadding adds two Ttk_Paddings together and returns a combined padding containing the sum of the individual padding components.

Ttk_RelievePadding adds an extra 2 pixels of padding to padding according to the specified relief. If relief is TK_RELIEF_SUNKEN, adds two pixels at the top and left so the inner region is shifted down and to the left. If it is TK_RELIEF_RAISED, adds two pixels at the bottom and right so the inner region is shifted up and to the right. Otherwise, adds 1 pixel on all sides. This is typically used in element geometry procedures to simulate a ``pressed-in'' look for pushbuttons.

CONVERSION ROUTINES

Ttk_GetPaddingFromObj converts the string in objPtr to a Ttk_Padding structure. The string representation is a list of up to four length specifications ``left top right bottom''. If fewer than four elements are specified, bottom defaults to top, right defaults to left, and top defaults to left. See Tk_GetPixelsFromObj(3) for the syntax of length specifications.

Ttk_GetBorderFromObj is the same as Ttk_GetPaddingFromObj except that the lengths are specified as integers (i.e., resolution-dependent values like 3m are not allowed).

Ttk_GetStickyFromObj converts the string in objPtr to a sticky bitmask. The string contains zero or more of the characters n, s, e, or w.

KEYWORDS

geometry, padding, margins, box, region, sticky, relief