/////////////////////////////////////////////////////////////////////////////
-// Name: windowsizing
+// Name: windowsizing.h
// Purpose: topic overview
// Author: wxWidgets team
// RCS-ID: $Id$
// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
-/*!
-
- @page windowsizing_overview 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
- @c 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.
-
- */
+/**
+@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.
+
+@li @ref overview_windowsizing_glossary
+@li @ref overview_windowsizing_func
+
+
+<hr>
+
+
+@section overview_windowsizing_glossary Glossary
+
+@li @b "Best Size": 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).
+ There is a special virtual method in the C++ window classes called
+ wxWindow::DoGetBestSize() that a class needs to override if it wants to calculate
+ its own best size based on its content.
+
+@li @b "Minimal Size": the minimal size of a widget is a size that is normally explicitly
+ set by the programmer either with the wxWindow::SetMinSize() method or with the
+ wxWindow::SetSizeHints() method.
+ Most controls will also set the minimal 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 minimal size.
+
+@li @b "Maximum Size": just like for the minimal size, the maximum size is normally
+ explicitely set by the programmer with the wxWindow::SetMaxSize() method or
+ with wxWindow::SetSizeHints().
+ Top-level windows such as wxFrame will not allow the user to resize the frame above
+ the maximum size.
+
+@li @b "Size": the size of a widget can be explicitly set or fetched with the
+ wxWindow::SetSize() or wxWindow::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.
+
+@li @b "Client Size": 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.
+
+@li @b "Initial Size": 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
+ minimal size. If the size passed to the constructor is the default ::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.
+
+@li @b "Virtual Size": the virtual size is the size of the potentially viewable
+ area of the widget.
+ The virtual size of a widget may be larger than its actual size and in this
+ case scrollbars will appear to the let the user 'explore' the full contents
+ of the widget.
+ See wxScrolled for more info.
+
+
+@section overview_windowsizing_func Functions related to sizing
+
+@li wxWindow::GetEffectiveMinSize(): returns a blending of the widget's minimal size
+ and best size, giving precedence to the minimal 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.
+
+@li wxWindow::SetInitialSize(): this is a little different than the typical size
+ setters. Rather than just setting an "initial size" attribute it actually sets
+ the minimal size 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 minimal size and the initial
+ size of the control.
+
+@li wxWindow::Fit(): this 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.
+
+@li wxSizer::Fit(): 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 wxWindow::Fit().
+
+@li wxSizer::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.
+
+@li wxWindow::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
+ wxSizer::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.
+
+*/
projects / wxWidgets.git / blobdiff