wxSizer - Functions for wxSizer class
Please see following description for synopsis
wxSizer(3) Erlang Module Definition wxSizer(3)
NAME
wxSizer - Functions for wxSizer class
DESCRIPTION
wxSizer is the abstract base class used for laying out subwindows in a
window. You cannot use wxSizer directly; instead, you will have to use
one of the sizer classes derived from it. Currently there are wxBox-
Sizer, wxStaticBoxSizer, wxGridSizer, wxFlexGridSizer, wxWrapSizer (not
implemented in wx) and wxGridBagSizer.
The layout algorithm used by sizers in wxWidgets is closely related to
layout in other GUI toolkits, such as Java's AWT, the GTK toolkit or
the Qt toolkit. It is based upon the idea of the individual subwindows
reporting their minimal required size and their ability to get
stretched if the size of the parent window has changed.
This will most often mean that the programmer does not set the original
size of a dialog in the beginning, rather the dialog will be assigned a
sizer and this sizer will be queried about the recommended size. The
sizer in turn will query its children, which can be normal windows,
empty space or other sizers, so that a hierarchy of sizers can be con-
structed. Note that wxSizer does not derive from wxWindow and thus does
not interfere with tab ordering and requires very little resources com-
pared to a real window on screen.
What makes sizers so well fitted for use in wxWidgets is the fact that
every control reports its own minimal size and the algorithm can handle
differences in font sizes or different window (dialog item) sizes on
different platforms without problems. If e.g. the standard font as well
as the overall design of Motif widgets requires more space than on Win-
dows, the initial dialog size will automatically be bigger on Motif
than on Windows.
Sizers may also be used to control the layout of custom drawn items on
the window. The add/4, insert/5, and prepend/4 functions return a
pointer to the newly added wxSizerItem. Just add empty space of the
desired size and attributes, and then use the wxSizerItem:getRect/1
method to determine where the drawing operations should take place.
Please notice that sizers, like child windows, are owned by the library
and will be deleted by it which implies that they must be allocated on
the heap. However if you create a sizer and do not add it to another
sizer or window, the library wouldn't be able to delete such an orphan
sizer and in this, and only this, case it should be deleted explicitly.
wxSizer flags
The "flag" argument accepted by wxSizerItem constructors and other
functions, e.g. add/4, is an OR-combination of the following flags. Two
main behaviours are defined using these flags. One is the border around
a window: the border parameter determines the border width whereas the
flags given here determine which side(s) of the item that the border
will be added. The other flags determine how the sizer item behaves
when the space allotted to the sizer changes, and is somewhat dependent
on the specific kind of sizer used.
See: Overview sizer
wxWidgets docs: wxSizer
DATA TYPES
wxSizer() = wx:wx_object()
EXPORTS
add(This, Window) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
add(This, Width, Height) -> wxSizerItem:wxSizerItem()
add(This, Window, Flags) -> wxSizerItem:wxSizerItem()
add(This, Window, Height :: [Option]) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
Option =
{proportion, integer()} |
{flag, integer()} |
{border, integer()} |
{userData, wx:wx_object()}
Appends a child to the sizer.
wxSizer itself is an abstract class, but the parameters are
equivalent in the derived classes that you will instantiate to
use it so they are described here:
add(This, Width, Height, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
add(This, Width, Height, Flags) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Width = Height = integer()
Flags = wxSizerFlags:wxSizerFlags()
Appends a spacer child to the sizer.
addSpacer(This, Size) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Size = integer()
This base function adds non-stretchable space to both the hori-
zontal and vertical orientation of the sizer.
More readable way of calling:
See: addSpacer/2
addStretchSpacer(This) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
addStretchSpacer(This, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Option = {prop, integer()}
Adds stretchable space to the sizer.
More readable way of calling:
calcMin(This) -> {W :: integer(), H :: integer()}
Types:
This = wxSizer()
This method is abstract and has to be overwritten by any derived
class.
Here, the sizer will do the actual calculation of its children's
minimal sizes.
clear(This) -> ok
Types:
This = wxSizer()
clear(This, Options :: [Option]) -> ok
Types:
This = wxSizer()
Option = {delete_windows, boolean()}
Detaches all children from the sizer.
If delete_windows is true then child windows will also be
deleted.
Notice that child sizers are always deleted, as a general conse-
quence of the principle that sizers own their sizer children,
but don't own their window children (because they are already
owned by their parent windows).
detach(This, Window) -> boolean()
detach(This, Index) -> boolean()
Types:
This = wxSizer()
Index = integer()
Detach a item at position index from the sizer without destroy-
ing it.
This method does not cause any layout or resizing to take place,
call layout/1 to update the layout "on screen" after detaching a
child from the sizer. Returns true if the child item was found
and detached, false otherwise.
See: remove/2
fit(This, Window) -> {W :: integer(), H :: integer()}
Types:
This = wxSizer()
Window = wxWindow:wxWindow()
Tell the sizer to resize the window so that its client area
matches the sizer's minimal size (ComputeFittingClientSize()
(not implemented in wx) is called to determine it).
This is commonly done in the constructor of the window itself,
see sample in the description of wxBoxSizer.
Return: The new window size.
See: ComputeFittingClientSize() (not implemented in wx), Comput-
eFittingWindowSize() (not implemented in wx)
setVirtualSizeHints(This, Window) -> ok
Types:
This = wxSizer()
Window = wxWindow:wxWindow()
See: fitInside/2.
fitInside(This, Window) -> ok
Types:
This = wxSizer()
Window = wxWindow:wxWindow()
Tell the sizer to resize the virtual size of the window to match
the sizer's minimal size.
This will not alter the on screen size of the window, but may
cause the addition/removal/alteration of scrollbars required to
view the virtual area in windows which manage it.
See: wxScrolledWindow:setScrollbars/6, setVirtualSizeHints/2
getChildren(This) -> [wxSizerItem:wxSizerItem()]
Types:
This = wxSizer()
getItem(This, Window) -> wxSizerItem:wxSizerItem()
getItem(This, Index) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = integer()
Finds wxSizerItem which is located in the sizer at position
index.
Use parameter recursive to search in subsizers too. Returns
pointer to item or NULL.
getItem(This, Window, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
Option = {recursive, boolean()}
Finds wxSizerItem which holds the given window.
Use parameter recursive to search in subsizers too. Returns
pointer to item or NULL.
getSize(This) -> {W :: integer(), H :: integer()}
Types:
This = wxSizer()
Returns the current size of the sizer.
getPosition(This) -> {X :: integer(), Y :: integer()}
Types:
This = wxSizer()
Returns the current position of the sizer.
getMinSize(This) -> {W :: integer(), H :: integer()}
Types:
This = wxSizer()
Returns the minimal size of the sizer.
This is either the combined minimal size of all the children and
their borders or the minimal size set by setMinSize/3, depending
on which is bigger. Note that the returned value is client size,
not window size. In particular, if you use the value to set
toplevel window's minimal or actual size, use wxWindow::SetMin-
ClientSize() (not implemented in wx) or wxWindow:setClient-
Size/3, not wxWindow:setMinSize/2 or wxWindow:setSize/6.
hide(This, Window) -> boolean()
hide(This, Index) -> boolean()
Types:
This = wxSizer()
Index = integer()
Hides the item at position index.
To make a sizer item disappear, use hide/3 followed by layout/1.
Use parameter recursive to hide elements found in subsizers.
Returns true if the child item was found, false otherwise.
See: isShown/2, show/3
hide(This, Window, Options :: [Option]) -> boolean()
Types:
This = wxSizer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
Option = {recursive, boolean()}
Hides the child window.
To make a sizer item disappear, use hide/3 followed by layout/1.
Use parameter recursive to hide elements found in subsizers.
Returns true if the child item was found, false otherwise.
See: isShown/2, show/3
insert(This, Index, Item) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = integer()
Item = wxSizerItem:wxSizerItem()
insert(This, Index, Width, Height) -> wxSizerItem:wxSizerItem()
insert(This, Index, Window, Flags) -> wxSizerItem:wxSizerItem()
insert(This, Index, Window, Height :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = integer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
Option =
{proportion, integer()} |
{flag, integer()} |
{border, integer()} |
{userData, wx:wx_object()}
Insert a child into the sizer before any existing item at index.
See add/4 for the meaning of the other parameters.
insert(This, Index, Width, Height, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
insert(This, Index, Width, Height, Flags) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = Width = Height = integer()
Flags = wxSizerFlags:wxSizerFlags()
Insert a child into the sizer before any existing item at index.
See add/4 for the meaning of the other parameters.
insertSpacer(This, Index, Size) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = Size = integer()
Inserts non-stretchable space to the sizer.
More readable way of calling wxSizer::Insert(index, size, size).
insertStretchSpacer(This, Index) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = integer()
insertStretchSpacer(This, Index, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Index = integer()
Option = {prop, integer()}
Inserts stretchable space to the sizer.
More readable way of calling wxSizer::Insert(0, 0, prop).
isShown(This, Window) -> boolean()
isShown(This, Index) -> boolean()
Types:
This = wxSizer()
Index = integer()
Returns true if the item at index is shown.
See: hide/3, show/3, wxSizerItem:isShown/1
recalcSizes(This) -> ok
Types:
This = wxSizer()
See: layout/1.
layout(This) -> ok
Types:
This = wxSizer()
Call this to force layout of the children anew, e.g. after hav-
ing added a child to or removed a child (window, other sizer or
space) from the sizer while keeping the current dimension.
prepend(This, Item) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Item = wxSizerItem:wxSizerItem()
prepend(This, Width, Height) -> wxSizerItem:wxSizerItem()
prepend(This, Window, Flags) -> wxSizerItem:wxSizerItem()
prepend(This, Window, Height :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Window = wxWindow:wxWindow() | wxSizer:wxSizer()
Option =
{proportion, integer()} |
{flag, integer()} |
{border, integer()} |
{userData, wx:wx_object()}
Same as add/4, but prepends the items to the beginning of the
list of items (windows, subsizers or spaces) owned by this
sizer.
prepend(This, Width, Height, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
prepend(This, Width, Height, Flags) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Width = Height = integer()
Flags = wxSizerFlags:wxSizerFlags()
Same as add/4, but prepends the items to the beginning of the
list of items (windows, subsizers or spaces) owned by this
sizer.
prependSpacer(This, Size) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Size = integer()
Prepends non-stretchable space to the sizer.
More readable way of calling wxSizer::Prepend(size, size, 0).
prependStretchSpacer(This) -> wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
prependStretchSpacer(This, Options :: [Option]) ->
wxSizerItem:wxSizerItem()
Types:
This = wxSizer()
Option = {prop, integer()}
Prepends stretchable space to the sizer.
More readable way of calling wxSizer::Prepend(0, 0, prop).
remove(This, Index) -> boolean()
remove(This, Sizer) -> boolean()
Types:
This = Sizer = wxSizer()
Removes a sizer child from the sizer and destroys it.
Note: This method does not cause any layout or resizing to take
place, call layout/1 to update the layout "on screen" after
removing a child from the sizer.
Return: true if the child item was found and removed, false oth-
erwise.
replace(This, Oldwin, Newwin) -> boolean()
replace(This, Index, Newitem) -> boolean()
Types:
This = wxSizer()
Index = integer()
Newitem = wxSizerItem:wxSizerItem()
Detaches the given item at position index from the sizer and
replaces it with the given wxSizerItem newitem.
The detached child is deleted only if it is a sizer or a spacer
(but not if it is a wxWindow because windows are owned by their
parent window, not the sizer).
This method does not cause any layout or resizing to take place,
call layout/1 to update the layout "on screen" after replacing a
child from the sizer.
Returns true if the child item was found and removed, false oth-
erwise.
replace(This, Oldwin, Newwin, Options :: [Option]) -> boolean()
Types:
This = wxSizer()
Oldwin = Newwin = wxWindow:wxWindow() | wxSizer:wxSizer()
Option = {recursive, boolean()}
Detaches the given oldwin from the sizer and replaces it with
the given newwin.
The detached child window is not deleted (because windows are
owned by their parent window, not the sizer).
Use parameter recursive to search the given element recursively
in subsizers.
This method does not cause any layout or resizing to take place,
call layout/1 to update the layout "on screen" after replacing a
child from the sizer.
Returns true if the child item was found and removed, false oth-
erwise.
setDimension(This, Pos, Size) -> ok
Types:
This = wxSizer()
Pos = {X :: integer(), Y :: integer()}
Size = {W :: integer(), H :: integer()}
This is an overloaded member function, provided for convenience.
It differs from the above function only in what argument(s) it
accepts.
setDimension(This, X, Y, Width, Height) -> ok
Types:
This = wxSizer()
X = Y = Width = Height = integer()
Call this to force the sizer to take the given dimension and
thus force the items owned by the sizer to resize themselves
according to the rules defined by the parameter in the add/4 and
prepend/4 methods.
setMinSize(This, Size) -> ok
Types:
This = wxSizer()
Size = {W :: integer(), H :: integer()}
Call this to give the sizer a minimal size.
Normally, the sizer will calculate its minimal size based purely
on how much space its children need. After calling this method
getMinSize/1 will return either the minimal size as requested by
its children or the minimal size set here, depending on which is
bigger.
setMinSize(This, Width, Height) -> ok
Types:
This = wxSizer()
Width = Height = integer()
This is an overloaded member function, provided for convenience.
It differs from the above function only in what argument(s) it
accepts.
setItemMinSize(This, Window, Size) -> boolean()
setItemMinSize(This, Index, Size) -> boolean()
Types:
This = wxSizer()
Index = integer()
Size = {W :: integer(), H :: integer()}
setItemMinSize(This, Window, Width, Height) -> boolean()
setItemMinSize(This, Index, Width, Height) -> boolean()
Types:
This = wxSizer()
Index = Width = Height = integer()
setSizeHints(This, Window) -> ok
Types:
This = wxSizer()
Window = wxWindow:wxWindow()
This method first calls fit/2 and then setSizeHints/2 on the
window passed to it.
This only makes sense when window is actually a wxTopLevelWindow
such as a wxFrame or a wxDialog, since SetSizeHints only has any
effect in these classes. It does nothing in normal windows or
controls.
This method is implicitly used by wxWindow:setSizerAndFit/3
which is commonly invoked in the constructor of a toplevel win-
dow itself (see the sample in the description of wxBoxSizer) if
the toplevel window is resizable.
show(This, Window) -> boolean()
show(This, Index) -> boolean()
show(This, Show) -> ok
Types:
This = wxSizer()
Show = boolean()
show(This, Window, Options :: [Option]) -> boolean()
show(This, Index, Options :: [Option]) -> boolean()
Types:
This = wxSizer()
Index = integer()
Option = {show, boolean()}
Shows the item at index.
To make a sizer item disappear or reappear, use show/3 followed
by layout/1.
Returns true if the child item was found, false otherwise.
See: hide/3, isShown/2
showItems(This, Show) -> ok
Types:
This = wxSizer()
Show = boolean()
Show or hide all items managed by the sizer.
wxWidgets team. wx 2.1.1 wxSizer(3)