| Version: 3.2.2

Public Member Functions | Static Public Member Functions | List of all members
wxSizerFlags Class Reference
Class List by Category » Window Layout

`#include <wx/sizer.h>`

## Detailed Description

Container for sizer items flags providing readable names for them.

Normally, when you add an item to a sizer via wxSizer::Add, you have to specify a lot of flags and parameters which can be unwieldy. This is where wxSizerFlags comes in: it allows you to specify all parameters using the named methods instead. For example, instead of

sizer->Add(ctrl, 0, wxEXPAND | wxALL, 10);
wxEXPAND
@ wxEXPAND
Definition: defs.h:115
wxALL
@ wxALL
Definition: defs.h:57

you can now write

sizer->Add(ctrl, wxSizerFlags().Expand().Border(wxALL, 10));
wxSizerFlags::Border
wxSizerFlags & Border(int direction, int borderinpixels)
Sets the wxSizerFlags to have a border of a number of pixels specified by borderinpixels with the dir...
wxSizerFlags::wxSizerFlags
wxSizerFlags(int proportion=0)
Creates the wxSizer with the proportion specified by proportion.
wxSizerFlags::Expand
wxSizerFlags & Expand()
Sets the object of the wxSizerFlags to expand to fill as much area as it can.

This is more readable and also allows you to create wxSizerFlags objects which can be reused for several sizer items.

wxSizerFlags flagsExpand(1);
flagsExpand.Expand().Border(wxALL, 10);
sizer->Add(ctrl1, flagsExpand);
sizer->Add(ctrl2, flagsExpand);
wxSizerFlags
Container for sizer items flags providing readable names for them.
Definition: sizer.h:1402

Note that by specification, all methods of wxSizerFlags return the wxSizerFlags object itself to allowing chaining multiple methods calls like in the examples above.

##

Library: wxCore
Category: Window Layout

See also
  wxSizer

## Public Member Functions

| wxSizerFlags (int proportion=0)
| Creates the wxSizer with the proportion specified by proportion. More...
wxSizerFlags & | Align (int alignment)
| Sets the alignment of this wxSizerFlags to align. More...
wxSizerFlags & | Border (int direction, int borderinpixels)
| Sets the wxSizerFlags to have a border of a number of pixels specified by borderinpixels with the directions specified by direction. More...
wxSizerFlags & | Border (int direction=wxALL)
| Sets the wxSizerFlags to have a border with size as returned by GetDefaultBorder(). More...
wxSizerFlags & | Bottom ()
| Aligns the object to the bottom, similar for `Align(wxALIGN_BOTTOM)`. More...
wxSizerFlags & | Center ()
| Sets the object of the wxSizerFlags to center itself in the area it is given. More...
wxSizerFlags & | Centre ()
| Center() for people with the other dialect of English. More...
wxSizerFlags & | CenterHorizontal ()
| Same as CentreHorizontal(). More...
wxSizerFlags & | CenterVertical ()
| Same as CentreVertical(). More...
wxSizerFlags & | CentreHorizontal ()
| Center an item only in horizontal direction. More...
wxSizerFlags & | CentreVertical ()
| Center an item only in vertical direction. More...
wxSizerFlags & | DoubleBorder (int direction=wxALL)
| Sets the border in the given direction having twice the default border size. More...
wxSizerFlags & | DoubleHorzBorder ()
| Sets the border in left and right directions having twice the default border size. More...
wxSizerFlags & | Expand ()
| Sets the object of the wxSizerFlags to expand to fill as much area as it can. More...
wxSizerFlags & | FixedMinSize ()
| Set the `wxFIXED_MINSIZE` flag which indicates that the initial size of the window should be also set as its minimal size. More...
wxSizerFlags & | ReserveSpaceEvenIfHidden ()
| Set the `wxRESERVE_SPACE_EVEN_IF_HIDDEN` flag. More...
wxSizerFlags & | Left ()
| Aligns the object to the left, similar for `Align(wxALIGN_LEFT)`. More...
wxSizerFlags & | Proportion (int proportion)
| Sets the proportion of this wxSizerFlags to proportion. More...
wxSizerFlags & | Right ()
| Aligns the object to the right, similar for `Align(wxALIGN_RIGHT)`. More...
wxSizerFlags & | Shaped ()
| Set the `wx_SHAPED` flag which indicates that the elements should always keep the fixed width to height ratio equal to its original value. More...
wxSizerFlags & | Top ()
| Aligns the object to the top, similar for `Align(wxALIGN_TOP)`. More...
wxSizerFlags & | TripleBorder (int direction=wxALL)
| Sets the border in the given direction having thrice the default border size. More...

## Static Public Member Functions

static void | DisableConsistencyChecks ()
| Globally disable checks for sizer flag consistency in debug builds. More...
static int | GetDefaultBorder ()
| Returns the border used by default in Border() method. More...
static float | GetDefaultBorderFractional ()
| Returns the border used by default, with fractional precision. More...

## Constructor & Destructor Documentation

## ◆ wxSizerFlags()

wxSizerFlags::wxSizerFlags | ( | int | proportion = `0` | ) |

Creates the wxSizer with the proportion specified by proportion.

## Member Function Documentation

## ◆ Align()

wxSizerFlags& wxSizerFlags::Align | ( | int | alignment | ) |

Sets the alignment of this wxSizerFlags to align.

This method replaces the previously set alignment with the specified one.

Parameters

  alignment | Combination of `wxALIGN_XXX` bit masks.

See also
  Top(), Left(), Right(), Bottom(), Centre()

## ◆ Border() [1/2]

wxSizerFlags& wxSizerFlags::Border | ( | int | direction,
|  | int | borderinpixels
| ) |  |

Sets the wxSizerFlags to have a border of a number of pixels specified by borderinpixels with the directions specified by direction.

Prefer to use the overload below or DoubleBorder() or TripleBorder() versions instead of hard-coding the border value in pixels to avoid too small borders on devices with high DPI displays.

## ◆ Border() [2/2]

wxSizerFlags& wxSizerFlags::Border | ( | int | direction = `wxALL` | ) |

Sets the wxSizerFlags to have a border with size as returned by GetDefaultBorder().

Parameters

  direction | Direction(s) to apply the border in.

## ◆ Bottom()

wxSizerFlags& wxSizerFlags::Bottom | ( |  | ) |

Aligns the object to the bottom, similar for `Align(wxALIGN_BOTTOM)`.

Unlike Align(), this method doesn't change the horizontal alignment of the item.

## ◆ Center()

wxSizerFlags& wxSizerFlags::Center | ( |  | ) |

Sets the object of the wxSizerFlags to center itself in the area it is given.

## ◆ CenterHorizontal()

wxSizerFlags& wxSizerFlags::CenterHorizontal | ( |  | ) |

Same as CentreHorizontal().

Since
  3.1.0

## ◆ CenterVertical()

wxSizerFlags& wxSizerFlags::CenterVertical | ( |  | ) |

Same as CentreVertical().

Since
  3.1.0

## ◆ Centre()

wxSizerFlags& wxSizerFlags::Centre | ( |  | ) |

Center() for people with the other dialect of English.

## ◆ CentreHorizontal()

wxSizerFlags& wxSizerFlags::CentreHorizontal | ( |  | ) |

Center an item only in horizontal direction.

This is mostly useful for 2D sizers as for the 1D ones it is shorter to just use Centre() as the alignment is only used in one direction with them anyhow. For 2D sizers, centering an item in one direction is quite different from centering it in both directions however.

Note that, unlike Align(), this method doesn't change the vertical alignment.

See also
  CentreVertical()

Since
  3.1.0

## ◆ CentreVertical()

wxSizerFlags& wxSizerFlags::CentreVertical | ( |  | ) |

Center an item only in vertical direction.

The remarks in CentreHorizontal() documentation also apply to this function.

Note that, unlike Align(), this method doesn't change the horizontal alignment.

Since
  3.1.0

## ◆ DisableConsistencyChecks()

static void wxSizerFlags::DisableConsistencyChecks | ( |  | ) |

static

Globally disable checks for sizer flag consistency in debug builds.

By default, sizer classes such as wxBoxSizer and wxFlexGridSizer assert when passed invalid flags, even though doing this usually doesn't result in any catastrophic consequences and the invalid flags are simply ignored later. Due to this, and the fact that these checks were only added in wxWidgets 3.1, existing code may run into multiple asserts warning about incorrect sizer flags use. Using this function provides a temporary solution for avoiding such asserts when upgrading to wxWidgets 3.1 from a previous version and will prevent such checks from being done.

Please do note that correcting the code by removing the invalid flags remains a much better solution as these asserts may be very helpful to understand why some code using sizer flags doesn't work as expected, so using this function, especially permanently, rather than a temporary workaround, is not recommended.

Notice that the same effect as calling this function can be achieved by setting the environment variable `WXSUPPRESS_SIZER_FLAGS_CHECK` to any value.

Since
  3.1.6

## ◆ DoubleBorder()

wxSizerFlags& wxSizerFlags::DoubleBorder | ( | int | direction = `wxALL` | ) |

Sets the border in the given direction having twice the default border size.

## ◆ DoubleHorzBorder()

wxSizerFlags& wxSizerFlags::DoubleHorzBorder | ( |  | ) |

Sets the border in left and right directions having twice the default border size.

## ◆ Expand()

wxSizerFlags& wxSizerFlags::Expand | ( |  | ) |

Sets the object of the wxSizerFlags to expand to fill as much area as it can.

## ◆ FixedMinSize()

wxSizerFlags& wxSizerFlags::FixedMinSize | ( |  | ) |

Set the `wxFIXED_MINSIZE` flag which indicates that the initial size of the window should be also set as its minimal size.

## ◆ GetDefaultBorder()

static int wxSizerFlags::GetDefaultBorder | ( |  | ) |

static

Returns the border used by default in Border() method.

This value is scaled appropriately for the current DPI on the systems where physical pixel values are used for the control positions and sizes, i.e. not with wxGTK or wxOSX.

See also
  GetDefaultBorderFractional()

## ◆ GetDefaultBorderFractional()

static float wxSizerFlags::GetDefaultBorderFractional | ( |  | ) |

static

Returns the border used by default, with fractional precision.

For example when the border is scaled to a non-integer DPI.

See also
  GetDefaultBorder()

Since
  3.1.4

## ◆ Left()

wxSizerFlags& wxSizerFlags::Left | ( |  | ) |

Aligns the object to the left, similar for `Align(wxALIGN_LEFT)`.

Unlike Align(), this method doesn't change the vertical alignment of the item.

## ◆ Proportion()

wxSizerFlags& wxSizerFlags::Proportion | ( | int | proportion | ) |

Sets the proportion of this wxSizerFlags to proportion.

## ◆ ReserveSpaceEvenIfHidden()

wxSizerFlags& wxSizerFlags::ReserveSpaceEvenIfHidden | ( |  | ) |

Set the `wxRESERVE_SPACE_EVEN_IF_HIDDEN` flag.

Normally wxSizers don't allocate space for hidden windows or other items. This flag overrides this behaviour so that sufficient space is allocated for the window even if it isn't visible. This makes it possible to dynamically show and hide controls without resizing parent dialog, for example.

Since
  2.8.8

## ◆ Right()

wxSizerFlags& wxSizerFlags::Right | ( |  | ) |

Aligns the object to the right, similar for `Align(wxALIGN_RIGHT)`.

Unlike Align(), this method doesn't change the vertical alignment of the item.

## ◆ Shaped()

wxSizerFlags& wxSizerFlags::Shaped | ( |  | ) |

Set the `wx_SHAPED` flag which indicates that the elements should always keep the fixed width to height ratio equal to its original value.

## ◆ Top()

wxSizerFlags& wxSizerFlags::Top | ( |  | ) |

Aligns the object to the top, similar for `Align(wxALIGN_TOP)`.

Unlike Align(), this method doesn't change the horizontal alignment of the item.

## ◆ TripleBorder()

wxSizerFlags& wxSizerFlags::TripleBorder | ( | int | direction = `wxALL` | ) |

Sets the border in the given direction having thrice the default border size.