X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/880efa2a137ce3e3f39236d0dc85f5d2dacdda12..7447d53c35249d42128d6243c90998f03882859a:/docs/doxygen/overviews/windowsizing.h diff --git a/docs/doxygen/overviews/windowsizing.h b/docs/doxygen/overviews/windowsizing.h index 5b73d456e0..baf7611eb5 100644 --- a/docs/doxygen/overviews/windowsizing.h +++ b/docs/doxygen/overviews/windowsizing.h @@ -3,98 +3,122 @@ // Purpose: topic overview // Author: wxWidgets team // RCS-ID: $Id$ -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// /** -@page overview_windowsizing Window Sizes +@page overview_windowsizing Window Sizing Overview It can sometimes be confusing to keep track of the various size-related attributes of a wxWindow, how they relate to each other, and how they interact with sizers. This document will attempt to clear the fog a little, and give some simple explanations of things. -@b BestSize: The best size of a widget depends on what kind of widget it is, -and usually also on the contents of the widget. For example a wxListBox's best -size will be calculated based on how many items it has, up to a certain limit, -or a wxButton's best size will be calculated based on its label size, but -normally won't be smaller than the platform default button size (unless a style -flag overrides that). Get the picture? There is a special virtual method in the -C++ window classes called @c DoGetBestSize() that a class needs to override if -it wants to calculate its own best size based on its content. The default -@c DoGetBestSize() is designed for use in container windows, such as wxPanel, -and works something like this: - --# If the window has a sizer then it is used to calculate the best size. --# Otherwise if the window has layout constraints then that is used to - calculate the best size. --# Otherwise if the window has children then the best size is set to be large - enough to show all the children. --# Otherwise if there are no children then the window's min size will be used - for the best size. --# Otherwise if there is no min size set, then the current size is used for the - best size. - -@b MinSize: The min size of a widget is a size that is normally explicitly set -by the programmer either with the @c SetMinSize() method or the -@c SetSizeHints() method. Most controls will also set the min size to the size -given in the control's constructor if a non-default value is passed. Top-level -windows such as wxFrame will not allow the user to resize the frame below the -min size. - -@b Size: The size of a widget can be explicitly set or fetched with the -@c SetSize() or @c GetSize() methods. This size value is the size that the -widget is currently using on screen and is the way to change the size of -something that is not being managed by a sizer. - -@b ClientSize: The client size represents the widget's area inside of any -borders belonging to the widget and is the area that can be drawn upon in a -@c EVT_PAINT event. If a widget doesn't have a border then its client size is -the same as its size. - -@b InitialSize: The initial size of a widget is the size given to the -constructor of the widget, if any. As mentioned above most controls will also -set this size value as the control's min size. If the size passed to the -constructor is the default @c wxDefaultSize, or if the size is not fully -specified (such as wxSize(150,-1)) then most controls will fill in the missing -size components using the best size and will set the initial size of the -control to the resulting size. - -@b GetEffectiveMinSize(): (formerly @c GetBestFittingSize) A blending of the -widget's min size and best size, giving precedence to the min size. For -example, if a widget's min size is set to (150, -1) and the best size is -(80, 22) then the best fitting size is (150, 22). If the min size is (50, 20) -then the best fitting size is (50, 20). This method is what is called by the -sizers when determining what the requirements of each item in the sizer is, and -is used for calculating the overall minimum needs of the sizer. - -@b SetInitialSize(size): (formerly @c SetBestFittingSize) This is a little -different than the typical size setters. Rather than just setting an -"initial size" attribute it actually sets the minsize to the value passed in, -blends that value with the best size, and then sets the size of the widget to -be the result. So you can consider this method to be a "Smart SetSize". This -method is what is called by the constructor of most controls to set the minsize -and initial size of the control. - -@b window.Fit(): The @c Fit() method sets the size of a window to fit around -its children. If it has no children then nothing is done, if it does have -children then the size of the window is set to the window's best size. - -@b sizer.Fit(window): This sets the size of the window to be large enough to -accommodate the minimum size needed by the sizer, (along with a few other -constraints...) If the sizer is the one that is assigned to the window then -this should be equivalent to @c window.Fit(). - -@b sizer.Layout(): Recalculates the minimum space needed by each item in the -sizer, and then lays out the items within the space currently allotted to the -sizer. - -@b window.Layout(): If the window has a sizer then it sets the space given to -the sizer to the current size of the window, which results in a call to -@c sizer.Layout(). If the window has layout constraints instead of a sizer then -the constraints algorithm is run. The @c Layout() method is what is called by -the default @c EVT_SIZE handler for container windows. +@li @ref overview_windowsizing_glossary +@li @ref overview_windowsizing_func + + +