docs/latex/wx/button.tex

   1 \section{\class{wxButton}}\label{wxbutton}
   2
   3 A button is a control that contains a text string,
   4 and is one of the commonest elements of a GUI. It may be placed on a
   5 \rtfsp\helpref{dialog box}{wxdialog} or \helpref{panel}{wxpanel}, or indeed
   6 almost any other window.
   7
   8 \wxheading{Derived from}
   9
  10 \helpref{wxControl}{wxcontrol}\\
  11 \helpref{wxWindow}{wxwindow}\\
  12 \helpref{wxEvtHandler}{wxevthandler}\\
  13 \helpref{wxObject}{wxobject}
  14
  15 \wxheading{Include files}
  16
  17 <wx/button.h>
  18
  19 \wxheading{Window styles}
  20
  21 \twocolwidtha{5cm}%
  22 \begin{twocollist}\itemsep=0pt
  23 \twocolitem{\windowstyle{wxBU\_LEFT}}{Left-justifies the label. Windows only.}
  24 \twocolitem{\windowstyle{wxBU\_TOP}}{Aligns the label to the top of the button. Windows only.}
  25 \twocolitem{\windowstyle{wxBU\_RIGHT}}{Right-justifies the bitmap label. Windows only.}
  26 \twocolitem{\windowstyle{wxBU\_BOTTOM}}{Aligns the label to the bottom of the button. Windows only.}
  27 \twocolitem{\windowstyle{wxBU\_EXACTFIT}}{Creates the button as small as possible instead of making it of the standard size (which is the default behaviour ).}
  28 \twocolitem{\windowstyle{wxNO\_BORDER}}{Creates a flat button. Windows and GTK+ only.}
  29 \end{twocollist}
  30
  31 See also \helpref{window styles overview}{windowstyles}.
  32
  33 \wxheading{Event handling}
  34
  35 \twocolwidtha{7cm}%
  36 \begin{twocollist}\itemsep=0pt
  37 \twocolitem{{\bf EVT\_BUTTON(id, func)}}{Process a wxEVT\_COMMAND\_BUTTON\_CLICKED event,
  38 when the button is clicked.}
  39 \end{twocollist}
  40
  41 \wxheading{See also}
  42
  43 \helpref{wxBitmapButton}{wxbitmapbutton}
  44
  45 \latexignore{\rtfignore{\wxheading{Members}}}
  46
  47 \membersection{wxButton::wxButton}\label{wxbuttonconstr}
  48
  49 \func{}{wxButton}{\void}
  50
  51 Default constructor.
  52
  53 \func{}{wxButton}{\param{wxWindow* }{parent}, \param{wxWindowID}{ id}, \param{const wxString\& }{label},\rtfsp
  54 \param{const wxPoint\& }{pos}, \param{const wxSize\& }{size = wxDefaultSize},\rtfsp
  55 \param{long}{ style = 0}, \param{const wxValidator\& }{validator}, \param{const wxString\& }{name = ``button"}}
  56
  57 Constructor, creating and showing a button.
  58
  59 \wxheading{Parameters}
  60
  61 \docparam{parent}{Parent window. Must not be NULL.}
  62
  63 \docparam{id}{Button identifier. A value of -1 indicates a default value.}
  64
  65 \docparam{label}{Text to be displayed on the button.}
  66
  67 \docparam{pos}{Button position.}
  68
  69 \docparam{size}{Button size. If the default size (-1, -1) is specified then the button is sized
  70 appropriately for the text.}
  71
  72 \docparam{style}{Window style. See \helpref{wxButton}{wxbutton}.}
  73
  74 \docparam{validator}{Window validator.}
  75
  76 \docparam{name}{Window name.}
  77
  78 \wxheading{See also}
  79
  80 \helpref{wxButton::Create}{wxbuttoncreate}, \helpref{wxValidator}{wxvalidator}
  81
  82 \membersection{wxButton::\destruct{wxButton}}
  83
  84 \func{}{\destruct{wxButton}}{\void}
  85
  86 Destructor, destroying the button.
  87
  88 \membersection{wxButton::Create}\label{wxbuttoncreate}
  89
  90 \func{bool}{Create}{\param{wxWindow* }{parent}, \param{wxWindowID}{ id}, \param{const wxString\& }{label},\rtfsp
  91 \param{const wxPoint\& }{pos}, \param{const wxSize\& }{size = wxDefaultSize},\rtfsp
  92 \param{long}{ style = 0}, \param{const wxValidator\& }{validator}, \param{const wxString\& }{name = ``button"}}
  93
  94 Button creation function for two-step creation. For more details, see \helpref{wxButton::wxButton}{wxbuttonconstr}.
  95
  96 \membersection{wxButton::GetLabel}\label{wxbuttongetlabel}
  97
  98 \constfunc{wxString}{GetLabel}{\void}
  99
 100 Returns the string label for the button.
 101
 102 \wxheading{Return value}
 103
 104 The button's label.
 105
 106 \wxheading{See also}
 107
 108 \helpref{wxButton::SetLabel}{wxbuttonsetlabel}
 109
 110 \membersection{wxButton::GetDefaultSize}\label{wxbuttongetdefaultsize}
 111
 112 \func{wxSize}{GetDefaultSize}{\void}
 113
 114 Returns the default size for the buttons. It is advised to make all the dialog
 115 buttons of the same size and this function allows to retrieve the (platform and
 116 current font dependent size) which should be the best suited for this.
 117
 118 \membersection{wxButton::SetDefault}\label{wxbuttonsetdefault}
 119
 120 \func{void}{SetDefault}{\void}
 121
 122 This sets the button to be the default item for the panel or dialog
 123 box.
 124
 125 \wxheading{Remarks}
 126
 127 Under Windows, only dialog box buttons respond to this function.  As
 128 normal under Windows and Motif, pressing return causes the default button to
 129 be depressed when the return key is pressed. See also \helpref{wxWindow::SetFocus}{wxwindowsetfocus}\rtfsp
 130 which sets the keyboard focus for windows and text panel items,\rtfsp
 131 and \helpref{wxPanel::SetDefaultItem}{wxpanelsetdefaultitem}.
 132
 133 Note that under Motif, calling this function immediately after
 134 creation of a button and before the creation of other buttons
 135 will cause misalignment of the row of buttons, since default
 136 buttons are larger. To get around this, call {\it SetDefault}\rtfsp
 137 after you have created a row of buttons: wxWidgets will
 138 then set the size of all buttons currently on the panel to
 139 the same size.
 140
 141 \membersection{wxButton::SetLabel}\label{wxbuttonsetlabel}
 142
 143 \func{void}{SetLabel}{\param{const wxString\& }{label}}
 144
 145 Sets the string label for the button.
 146
 147 \wxheading{Parameters}
 148
 149 \docparam{label}{The label to set.}
 150
 151 \wxheading{See also}
 152
 153 \helpref{wxButton::GetLabel}{wxbuttongetlabel}
 154