X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/2b5f62a0b2db198609b45dec622a018dae37008e..78cb09ec439962b53ba75fef814b9a3871412287:/docs/latex/wx/tsizer.tex diff --git a/docs/latex/wx/tsizer.tex b/docs/latex/wx/tsizer.tex index 618c9f7b04..815b7e4357 100644 --- a/docs/latex/wx/tsizer.tex +++ b/docs/latex/wx/tsizer.tex @@ -3,27 +3,26 @@ Classes: \helpref{wxSizer}{wxsizer}, \helpref{wxGridSizer}{wxgridsizer}, \helpref{wxFlexGridSizer}{wxflexgridsizer}, \helpref{wxBoxSizer}{wxboxsizer}, \helpref{wxStaticBoxSizer}{wxstaticboxsizer}, -\helpref{wxNotebookSizer}{wxnotebooksizer}, \helpref{CreateButtonSizer}{createbuttonsizer} Sizers, as represented by the wxSizer class and its descendants in -the wxWindows class hierarchy, have become the method of choice to -define the layout of controls in dialogs in wxWindows because of +the wxWidgets class hierarchy, have become the method of choice to +define the layout of controls in dialogs in wxWidgets because of their ability to create visually appealing dialogs independent of the platform, taking into account the differences in size and style of -the individual controls. Unlike the original wxWindows Dialog Editor, -editors such as wxDesigner, wxrcedit, XRCed and wxWorkshop create dialogs based exclusively on sizers, +the individual controls. Unlike the original wxWidgets Dialog Editor, +editors such as wxDesigner, DialogBlocks, XRCed and wxWorkshop create dialogs based exclusively on sizers, practically forcing the user to create platform independent layouts without compromises. The next section describes and shows what can be done with sizers. The following sections briefly describe how to program with individual sizer classes. -For information about the new wxWindows resource system, which can describe +For information about the new wxWidgets resource system, which can describe sizer-based dialogs, see the \helpref{XML-based resource system overview}{xrcoverview}. \subsection{The idea behind sizers}\label{ideabehindsizers} -The layout algorithm used by sizers in wxWindows is closely related to layout +The layout algorithm used by sizers in wxWidgets is closely related to layout systems in other GUI toolkits, such as Java's AWT, the GTK toolkit or the Qt toolkit. It is based upon the idea of individual subwindows reporting their minimal required size and their ability to get stretched if the size of the parent window has changed. @@ -35,14 +34,14 @@ a hierarchy of sizers can be constructed. Note that wxSizer does not derive from and thus does not interfere with tab ordering and requires very few resources compared to a real window on screen. -What makes sizers so well fitted for use in wxWindows is the fact that every control +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. For example, if the standard font as well as the overall design of Linux/GTK widgets requires more space than on Windows, the initial dialog size will automatically be bigger on Linux/GTK than on Windows. -There are currently five different kinds of sizers available in wxWindows. Each represents -either a certain way to lay out dialog items in a dialog or it fulfils a special task +There are currently five different kinds of sizers available in wxWidgets. Each represents +either a certain way to lay out dialog items in a dialog or it fulfills a special task such as wrapping a static box around a dialog item (or another sizer). These sizers will be discussed one by one in the text below. For more detailed information on how to use sizers programmatically, please refer to the section \helpref{Programming with Sizers}{boxsizerprogramming}. @@ -56,7 +55,7 @@ have certain features in common: {\bf A minimal size:} This minimal size is usually identical to the initial size of the controls and may either be set explicitly in the wxSize field -of the control constructor or may be calculated by wxWindows, typically by setting +of the control constructor or may be calculated by wxWidgets, typically by setting the height and/or the width of the item to -1. Note that only some controls can calculate their size (such as a checkbox) whereas others (such as a listbox) don't have any natural width or height and thus require an explicit size. Some controls @@ -113,6 +112,21 @@ initial width: Within wxDesigner, this stretch factor gets set from the {\it Option} menu. +\subsubsection{Hiding controls using sizers}\label{sizershiding} + +You can hide controls contained in sizers the same way you would hide any control, +using the \helpref{wxWindow::Show}{wxwindowshow} method. + +However, wxSizer also offers a separate method which can tell the sizer not to +consider that control in its size calculations. To hide a window using the sizer, +call \helpref{wxSizer::Show}{wxsizershow}. You must then call Layout on the sizer +to force an update. + +This is useful when hiding parts of the interface, since you can avoid removing +the controls from the sizer and having to add them back later. + +Note: This is supported only by wxBoxSizer and wxFlexGridSizer. + \wxheading{wxBoxSizer} \helpref{wxBoxSizer}{wxboxsizer} can lay out its children either vertically @@ -157,24 +171,16 @@ For programming information, see \helpref{wxGridSizer}{wxgridsizer}. Another two-dimensional sizer derived from wxGridSizer. The width of each column and the height of each row -are calculated individually according the minimal requirements +are calculated individually according to the minimal requirements from the respectively biggest child. Additionally, columns and rows can be declared to be stretchable if the sizer is assigned -a size different from that which it requested. The following sample shows +a size different from the one it requested. The following sample shows the same dialog as the one above, but using a flex grid sizer: \begin{center} \myimage{sizer11.eps} \end{center} -\wxheading{wxNotebookSizer} - -\helpref{wxNotebookSizer}{wxnotebooksizer} can be used -with notebooks. It calculates the size of each -notebook page and sets the size of the notebook to the size -of the biggest page plus some extra space required for the -notebook tabs and decorations. - \subsection{Programming with wxBoxSizer}\label{boxsizerprogramming} The basic idea behind a \helpref{wxBoxSizer}{wxboxsizer} is that windows will most often be laid out in rather @@ -209,7 +215,7 @@ wxALIGN\_BOTTOM, wxALIGN\_CENTER\_HORIZONTAL and wxALIGN\_CENTER\_VERTICAL do wh wxALIGN\_CENTRE (same as wxALIGN\_CENTER) is defined as (wxALIGN\_CENTER\_HORIZONTAL | wxALIGN\_CENTER\_VERTICAL). Default alignment is wxALIGN\_LEFT | wxALIGN\_TOP. -As mentioned above, any window belonging to a sizer may have border, and it can be specified +As mentioned above, any window belonging to a sizer may have a border, and it can be specified which of the four sides may have this border, using the wxTOP, wxLEFT, wxRIGHT and wxBOTTOM constants or wxALL for all directions (and you may also use wxNORTH, wxWEST etc instead). These flags can be used in combination with the alignment flags above as the second parameter of the @@ -259,6 +265,50 @@ MyDialog::MyDialog(wxFrame *parent, wxWindowID id, const wxString &title ) } \end{verbatim} +Note that the new way of specifying flags to wxSizer is via \helpref{wxSizerFlags}{wxsizerflags}. This class greatly eases the burden of passing flags to a wxSizer. + +Here's how you'd do the previous example with wxSizerFlags: + +\begin{verbatim} +// we want to get a dialog that is stretchable because it +// has a text ctrl at the top and two buttons at the bottom + +MyDialog::MyDialog(wxFrame *parent, wxWindowID id, const wxString &title ) + : wxDialog(parent, id, title, wxDefaultPosition, wxDefaultSize, + wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER) +{ + wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL ); + + // create text ctrl with minimal size 100x60 that is horizontally and + // vertically stretchable with a border width of 10 + topsizer->Add( + new wxTextCtrl( this, -1, "My text.", wxDefaultPosition, wxSize(100,60), wxTE_MULTILINE), + wxSizerFlags(1).Align().Expand().Border(wxALL, 10)); + + wxBoxSizer *button_sizer = new wxBoxSizer( wxHORIZONTAL ); + + //create two buttons that are horizontally unstretchable, + // with an all-around border with a width of 10 and implicit top alignment + button_sizer->Add( + new wxButton( this, wxID_OK, "OK" ), + wxSizerFlags(0).Align().Border(wxALL, 10)); + + button_sizer->Add( + new wxButton( this, wxID_CANCEL, "Cancel" ), + wxSizerFlags(0).Align().Border(wxALL, 10)); + + //create a sizer with no border and centered horizontally + topsizer->Add( + button_sizer, + wxSizerFlags(0).Center() ); + + SetSizer( topsizer ); // use the sizer for layout + + topsizer->SetSizeHints( this ); // set size hints to honour minimum size +} +\end{verbatim} + + \subsection{Programming with wxGridSizer}\label{gridsizerprogramming} \helpref{wxGridSizer}{wxgridsizer} is a sizer which lays out its children in a two-dimensional @@ -274,39 +324,6 @@ height and all fields in one column having the same width, but all rows or all columns are not necessarily the same height or width as in the \helpref{wxGridSizer}{wxgridsizer}. -\subsection{Programming with wxNotebookSizer}\label{notebooksizerprogramming} - -\helpref{wxNotebookSizer}{wxnotebooksizer} is a specialized sizer to make sizers work in connection -with using notebooks. This sizer is different from any other sizer as -you must not add any children to it - instead, it queries the notebook class itself. -The only thing this sizer does is to determine the size of the biggest -page of the notebook and report an adjusted minimal size to a more toplevel -sizer. - -In order to query the size of notebook page, this page needs to have its -own sizer, otherwise the wxNotebookSizer will ignore it. Notebook pages -get their sizer by assigning one to them using \helpref{wxWindow::SetSizer}{wxwindowsetsizer} -and setting the auto-layout option to TRUE using -\helpref{wxWindow::SetAutoLayout}{wxwindowsetautolayout}. Here is one -example showing how to add a notebook page that the notebook sizer is -aware of: - -\begin{verbatim} - wxNotebook *notebook = new wxNotebook( &dialog, -1 ); - wxNotebookSizer *nbs = new wxNotebookSizer( notebook ); - - // Add panel as notebook page - wxPanel *panel = new wxPanel( notebook, -1 ); - notebook->AddPage( panel, "My Notebook Page" ); - - wxBoxSizer *panelsizer = new wxBoxSizer( wxVERTICAL ); - - // Add controls to panel and panelsizer here... - - panel->SetAutoLayout( TRUE ); - panel->SetSizer( panelsizer ); -\end{verbatim} - \subsection{Programming with wxStaticBoxSizer}\label{staticboxsizerprogramming} \helpref{wxStaticBoxSizer}{wxstaticboxsizer} is a sizer derived from wxBoxSizer but adds a static