df348ff8c7
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41389 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
666 lines
20 KiB
TeX
666 lines
20 KiB
TeX
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%% Name: comboctrl.tex
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%% Purpose: wxComboCtrl docs
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%% Author: Jaakko Salli
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%% Modified by:
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%% Created:
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%% RCS-ID: $Id$
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%% Copyright: (c) Jaakko Salli
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%% License: wxWindows license
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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\section{\class{wxComboCtrl}}\label{wxcomboctrl}
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A combo control is a generic combobox that allows totally
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custom popup. In addition it has other customization features.
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For instance, position and size of the dropdown button
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can be changed.
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\wxheading{Setting Custom Popup for wxComboCtrl}
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wxComboCtrl needs to be told somehow which control to use
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and this is done by SetPopupControl(). However, we need
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something more than just a wxControl in this method as,
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for example, we need to call SetStringValue("initial text value")
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and wxControl doesn't have such method. So we also need a
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\helpref{wxComboPopup}{wxcombopopup} which is an interface which
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must be implemented by a control to be usable as a popup.
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We couldn't derive wxComboPopup from wxControl as this would make it
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impossible to have a class deriving from a wxWidgets control and from
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it, so instead it is just a mix-in.
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Here's a minimal sample of \helpref{wxListView}{wxlistview} popup:
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\begin{verbatim}
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#include <wx/combo.h>
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#include <wx/listctrl.h>
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class wxListViewComboPopup : public wxListView,
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public wxComboPopup
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{
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public:
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// Initialize member variables
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virtual void Init()
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{
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m_value = -1;
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}
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// Create popup control
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virtual bool Create(wxWindow* parent)
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{
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return wxListView::Create(parent,1,wxPoint(0,0),wxDefaultSize);
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}
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// Return pointer to the created control
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virtual wxWindow *GetControl() { return this; }
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// Translate string into a list selection
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virtual void SetStringValue(const wxString& s)
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{
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int n = wxListView::FindItem(-1,s);
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if ( n >= 0 && n < wxListView::GetItemCount() )
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wxListView::Select(n);
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}
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// Get list selection as a string
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virtual wxString GetStringValue() const
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{
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if ( m_value >= 0 )
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return wxListView::GetItemText(m_value);
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return wxEmptyString;
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}
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// Do mouse hot-tracking (which is typical in list popups)
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void OnMouseMove(wxMouseEvent& event)
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{
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// TODO: Move selection to cursor
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}
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// On mouse left up, set the value and close the popup
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void OnMouseClick(wxMouseEvent& WXUNUSED(event))
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{
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m_value = wxListView::GetFirstSelected();
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// TODO: Send event as well
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Dismiss();
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}
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protected:
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int m_value; // current item index
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private:
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DECLARE_EVENT_TABLE()
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};
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BEGIN_EVENT_TABLE(wxListViewComboPopup, wxListView)
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EVT_MOTION(wxListViewComboPopup::OnMouseMove)
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EVT_LEFT_UP(wxListViewComboPopup::OnMouseClick)
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END_EVENT_TABLE()
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\end{verbatim}
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Here's how you would create and populate it in a dialog constructor:
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\begin{verbatim}
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wxComboCtrl* comboCtrl = new wxComboCtrl(this,wxID_ANY,wxEmptyString);
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wxListViewComboPopup* popupCtrl = new wxListViewComboPopup();
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comboCtrl->SetPopupControl(popupCtrl);
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// Populate using wxListView methods
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popupCtrl->InsertItem(popupCtrl->GetItemCount(),wxT("First Item"));
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popupCtrl->InsertItem(popupCtrl->GetItemCount(),wxT("Second Item"));
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popupCtrl->InsertItem(popupCtrl->GetItemCount(),wxT("Third Item"));
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\end{verbatim}
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\wxheading{Derived from}
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\helpref{wxControl}{wxcontrol}\\
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\helpref{wxWindow}{wxwindow}\\
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\helpref{wxEvtHandler}{wxevthandler}\\
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\helpref{wxObject}{wxobject}
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\wxheading{Include files}
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<combo.h>
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\wxheading{Window styles}
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\begin{twocollist}\itemsep=0pt
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\twocolitem{\windowstyle{wxCB\_READONLY}}{Text will not be editable.}
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\twocolitem{\windowstyle{wxCB\_SORT}}{Sorts the entries in the list alphabetically.}
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\twocolitem{\windowstyle{wxTE\_PROCESS\_ENTER}}{The control will generate
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the event wxEVT\_COMMAND\_TEXT\_ENTER (otherwise pressing Enter key
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is either processed internally by the control or used for navigation between
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dialog controls). Windows only.}
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\twocolitem{\windowstyle{wxCC\_SPECIAL\_DCLICK}}{Double-clicking triggers a call
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to popup's OnComboDoubleClick. Actual behaviour is defined by a derived
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class. For instance, wxOwnerDrawnComboBox will cycle an item. This style only
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applies if wxCB\_READONLY is used as well.}
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\twocolitem{\windowstyle{wxCC\_STD\_BUTTON}}{Drop button will behave
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more like a standard push button.}
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\end{twocollist}
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See also \helpref{window styles overview}{windowstyles}.
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\wxheading{Event handling}
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\twocolwidtha{7cm}
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\begin{twocollist}\itemsep=0pt
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\twocolitem{{\bf EVT\_TEXT(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_UPDATED event,
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when the text changes.}
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\twocolitem{{\bf EVT\_TEXT\_ENTER(id, func)}}{Process a wxEVT\_COMMAND\_TEXT\_ENTER event,
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when <RETURN> is pressed in the combo control.}
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\end{twocollist}
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\wxheading{See also}
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\helpref{wxComboBox}{wxcombobox}, \helpref{wxChoice}{wxchoice},
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\helpref{wxOwnerDrawnComboBox}{wxownerdrawncombobox},
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\rtfsp\helpref{wxComboPopup}{wxcombopopup}, \helpref{wxCommandEvent}{wxcommandevent}
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\latexignore{\rtfignore{\wxheading{Members}}}
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\membersection{wxComboCtrl::wxComboCtrl}\label{wxcomboctrlctor}
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\func{}{wxComboCtrl}{\void}
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Default constructor.
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\func{}{wxComboCtrl}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
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\param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
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\param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboCtrl"}}
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Constructor, creating and showing a combo control.
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\wxheading{Parameters}
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\docparam{parent}{Parent window. Must not be NULL.}
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\docparam{id}{Window identifier. A value of -1 indicates a default value.}
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\docparam{value}{Initial selection string. An empty string indicates no selection.}
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\docparam{pos}{Window position.}
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\docparam{size}{Window size. If the default size (-1, -1) is specified then the window is sized
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appropriately.}
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\docparam{style}{Window style. See \helpref{wxComboCtrl}{wxcomboctrl}.}
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\docparam{validator}{Window validator.}
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\docparam{name}{Window name.}
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\wxheading{See also}
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\helpref{wxComboCtrl::Create}{wxcomboctrlcreate}, \helpref{wxValidator}{wxvalidator}
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\membersection{wxComboCtrl::\destruct{wxComboCtrl}}\label{wxcomboctrldtor}
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\func{}{\destruct{wxComboCtrl}}{\void}
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Destructor, destroying the combo control.
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\membersection{wxComboCtrl::Create}\label{wxcomboctrlcreate}
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\func{bool}{Create}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
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\param{const wxString\& }{value = ``"}, \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
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\param{long}{ style = 0}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``comboCtrl"}}
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Creates the combo control for two-step construction. Derived classes
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should call or replace this function. See \helpref{wxComboCtrl::wxComboCtrl}{wxcomboctrlctor}\rtfsp
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for further details.
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\membersection{wxComboCtrl::Copy}\label{wxcomboctrlcopy}
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\func{void}{Copy}{\void}
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Copies the selected text to the clipboard.
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\membersection{wxComboCtrl::Cut}\label{wxcomboctrlcut}
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\func{void}{Cut}{\void}
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Copies the selected text to the clipboard and removes the selection.
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\membersection{wxComboCtrl::DoSetPopupControl}\label{wxcomboctrldosetpopupcontrol}
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\func{void}{DoSetPopupControl}{\param{wxComboPopup* }{popup}}
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This member function is not normally called in application code.
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Instead, it can be implemented in a derived class to return
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default wxComboPopup, incase {\tt popup} is NULL.
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\textbf{Note:} If you have implemented OnButtonClick to do
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something else than show the popup, then DoSetPopupControl
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must always return NULL.
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\membersection{wxComboCtrl::GetBitmapDisabled}\label{wxcomboctrlgetbitmapdisabled}
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\constfunc{const wxBitmap\&}{GetBitmapDisabled}{\void}
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Returns disabled button bitmap that has been set with
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\helpref{SetButtonBitmaps}{wxcomboctrlsetbuttonbitmaps}.
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\wxheading{Return value}
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A reference to the disabled state bitmap.
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\membersection{wxComboCtrl::GetBitmapHover}\label{wxcomboctrlgetbitmaphover}
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\constfunc{const wxBitmap\&}{GetBitmapHover}{\void}
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Returns button mouse hover bitmap that has been set with
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\helpref{SetButtonBitmaps}{wxcomboctrlsetbuttonbitmaps}.
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\wxheading{Return value}
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A reference to the mouse hover state bitmap.
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\membersection{wxComboCtrl::GetBitmapNormal}\label{wxcomboctrlgetbitmapnormal}
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\constfunc{const wxBitmap\&}{GetBitmapNormal}{\void}
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Returns default button bitmap that has been set with
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\helpref{SetButtonBitmaps}{wxcomboctrlsetbuttonbitmaps}.
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\wxheading{Return value}
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A reference to the normal state bitmap.
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\membersection{wxComboCtrl::GetBitmapPressed}\label{wxcomboctrlgetbitmappressed}
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\constfunc{const wxBitmap\&}{GetBitmapPressed}{\void}
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Returns depressed button bitmap that has been set with
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\helpref{SetButtonBitmaps}{wxcomboctrlsetbuttonbitmaps}.
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\wxheading{Return value}
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A reference to the depressed state bitmap.
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\membersection{wxComboCtrl::GetButtonSize}\label{wxcomboctrlgetbuttonsize}
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\func{wxSize}{GetButtonSize}{\void}
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Returns current size of the dropdown button.
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\membersection{wxComboCtrl::GetCustomPaintWidth}\label{wxcomboctrlgetcustompaintwidth}
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\constfunc{int}{GetCustomPaintWidth}{\void}
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Returns custom painted area in control.
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\wxheading{See also}
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\helpref{wxComboCtrl::SetCustomPaintWidth}{wxcomboctrlsetcustompaintwidth}.
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\membersection{wxComboCtrl::GetFeatures}\label{wxcomboctrlgetfeatures}
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\func{static int}{GetFeatures}{\void}
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Returns features supported by wxComboCtrl. If needed feature is missing,
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you need to instead use wxGenericComboCtrl, which however may lack
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native look and feel (but otherwise sports identical API).
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\wxheading{Return value}
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Value returned is a combination of following flags:
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\twocolwidtha{8cm}%
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\begin{twocollist}\itemsep=0pt
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\twocolitem{{\tt wxComboCtrlFeatures::MovableButton}}{Button can
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be on either side of the control.}
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\twocolitem{{\tt wxComboCtrlFeatures::BitmapButton}}{Button may
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be replaced with bitmap.}
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\twocolitem{{\tt wxComboCtrlFeatures::ButtonSpacing}}{Button can
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have spacing.}
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\twocolitem{{\tt wxComboCtrlFeatures::TextIndent}}{SetTextIndent
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works.}
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\twocolitem{{\tt wxComboCtrlFeatures::PaintControl}}{Combo control
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itself can be custom painted.}
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\twocolitem{{\tt wxComboCtrlFeatures::PaintWritable}}{A variable-
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width area in front of writable combo control's textctrl can
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be custom painted.}
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\twocolitem{{\tt wxComboCtrlFeatures::Borderless}}{wxNO\_BORDER
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window style works.}
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\twocolitem{{\tt wxComboCtrlFeatures::All}}{All of the
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above.}
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\end{twocollist}
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\membersection{wxComboCtrl::GetInsertionPoint}\label{wxcomboctrlgetinsertionpoint}
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\constfunc{long}{GetInsertionPoint}{\void}
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Returns the insertion point for the combo control's text field.
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\textbf{Note:} Under wxMSW, this function always returns $0$ if the combo control
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doesn't have the focus.
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\membersection{wxComboCtrl::GetLastPosition}\label{wxcomboctrlgetlastposition}
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\constfunc{long}{GetLastPosition}{\void}
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Returns the last position in the combo control text field.
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\membersection{wxComboCtrl::GetPopupControl}\label{wxcomboctrlgetpopupcontrol}
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\func{wxComboPopup*}{GetPopupControl}{\void}
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Returns current popup interface that has been set with SetPopupControl.
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\membersection{wxComboCtrl::GetPopupWindow}\label{wxcomboctrlgetpopupwindow}
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\constfunc{wxWindow*}{GetPopupWindow}{\void}
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Returns popup window containing the popup control.
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\membersection{wxComboCtrl::GetTextCtrl}\label{wxcomboctrlgettextctrl}
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\constfunc{wxTextCtrl*}{GetTextCtrl}{\void}
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Get the text control which is part of the combo control.
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\membersection{wxComboCtrl::GetTextIndent}\label{wxcomboctrlgettextindent}
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\constfunc{wxCoord}{GetTextIndent}{\void}
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Returns actual indentation in pixels.
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\membersection{wxComboCtrl::GetTextRect}\label{wxcomboctrlgettextrect}
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\constfunc{const wxRect\&}{GetTextRect}{\void}
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Returns area covered by the text field (includes everything except
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borders and the dropdown button).
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\membersection{wxComboCtrl::GetValue}\label{wxcomboctrlgetvalue}
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\constfunc{wxString}{GetValue}{\void}
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Returns text representation of the current value. For writable
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combo control it always returns the value in the text field.
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\membersection{wxComboCtrl::HidePopup}\label{wxcomboctrlhidepopup}
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\func{void}{HidePopup}{\void}
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Dismisses the popup window.
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\membersection{wxComboCtrl::IsPopupShown}\label{wxcomboctrlispopupshown}
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\constfunc{bool}{IsPopupShown}{\void}
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Returns \true if the popup is currently shown
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\membersection{wxComboCtrl::OnButtonClick}\label{wxcomboctrlonbuttonclick}
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\func{void}{OnButtonClick}{\void}
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Implement in a derived class to define what happens on
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dropdown button click.
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Default action is to show the popup.
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\textbf{Note:} If you implement this to do something else than
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show the popup, you must then also implement
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\helpref{DoSetPopupControl}{wxcomboctrldosetpopupcontrol} to always
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return NULL.
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\membersection{wxComboCtrl::Paste}\label{wxcomboctrlpaste}
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\func{void}{Paste}{\void}
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Pastes text from the clipboard to the text field.
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\membersection{wxComboCtrl::Remove}\label{wxcomboctrlremove}
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\func{void}{Remove}{\param{long }{from}, \param{long }{to}}
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Removes the text between the two positions in the combo control text field.
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\wxheading{Parameters}
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\docparam{from}{The first position.}
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\docparam{to}{The last position.}
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\membersection{wxComboCtrl::Replace}\label{wxcomboctrlreplace}
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\func{void}{Replace}{\param{long }{from}, \param{long }{to}, \param{const wxString\& }{value}}
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Replaces the text between two positions with the given text, in the combo control text field.
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\wxheading{Parameters}
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\docparam{from}{The first position.}
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\docparam{to}{The second position.}
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\docparam{text}{The text to insert.}
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\membersection{wxComboCtrl::SetButtonBitmaps}\label{wxcomboctrlsetbuttonbitmaps}
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\func{void}{SetButtonBitmaps}{\param{const wxBitmap\& }{bmpNormal}, \param{bool }{pushButtonBg = false}, \param{const wxBitmap\& }{bmpPressed = wxNullBitmap}, \param{const wxBitmap\& }{bmpHover = wxNullBitmap}, \param{const wxBitmap\& }{bmpDisabled = wxNullBitmap}}
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Sets custom dropdown button graphics.
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\wxheading{Parameters}
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\docparam{bmpNormal}{Default button image.}
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\docparam{pushButtonBg}{If \true, blank push button background is painted
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below the image.}
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\docparam{bmpPressed}{Depressed button image.}
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\docparam{bmpHover}{Button image when mouse hovers above it. This
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should be ignored on platforms and themes that do not generally draw
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different kind of button on mouse hover.}
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\docparam{bmpDisabled}{Disabled button image.}
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\membersection{wxComboCtrl::SetButtonPosition}\label{wxcomboctrlsetbuttonposition}
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\func{void}{SetButtonPosition}{\param{int }{width = -1}, \param{int }{height = -1}, \param{int }{side = wxRIGHT}, \param{int }{spacingX = 0}}
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Sets size and position of dropdown button.
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\wxheading{Parameters}
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\docparam{width}{Button width. Value <= $0$ specifies default.}
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\docparam{height}{Button height. Value <= $0$ specifies default.}
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\docparam{side}{Indicates which side the button will be placed.
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Value can be {\tt wxLEFT} or {\tt wxRIGHT}.}
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\docparam{spacingX}{Horizontal spacing around the button. Default is $0$.}
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\membersection{wxComboCtrl::SetCustomPaintWidth}\label{wxcomboctrlsetcustompaintwidth}
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\func{void}{SetCustomPaintWidth}{\param{int }{width}}
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Set width, in pixels, of custom painted area in control without {\tt wxCB\_READONLY}
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style. In read-only \helpref{wxOwnerDrawnComboBox}{wxownerdrawncombobox}, this is used
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to indicate area that is not covered by the focus rectangle.
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\membersection{wxComboCtrl::SetInsertionPoint}\label{wxcomboctrlsetinsertionpoint}
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\func{void}{SetInsertionPoint}{\param{long }{pos}}
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Sets the insertion point in the text field.
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\wxheading{Parameters}
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\docparam{pos}{The new insertion point.}
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\membersection{wxComboCtrl::SetInsertionPointEnd}\label{wxcomboctrlsetinsertionpointend}
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\func{void}{SetInsertionPointEnd}{\void}
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Sets the insertion point at the end of the combo control text field.
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\membersection{wxComboCtrl::SetPopupAnchor}\label{wxcomboctrlsetpopupanchor}
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\func{void}{SetPopupAnchor}{\param{int }{anchorSide}}
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Set side of the control to which the popup will align itself. Valid values are
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{\tt wxLEFT}, {\tt wxRIGHT} and $0$. The default value $0$ means that the most appropriate
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side is used (which, currently, is always {\tt wxLEFT}).
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\membersection{wxComboCtrl::SetPopupControl}\label{wxcomboctrlsetpopupcontrol}
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\func{void}{SetPopupControl}{\param{wxComboPopup* }{popup}}
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Set popup interface class derived from wxComboPopup.
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This method should be called as soon as possible after the control
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has been created, unless \helpref{OnButtonClick}{wxcomboctrlonbuttonclick}
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has been overridden.
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\membersection{wxComboCtrl::SetPopupExtents}\label{wxcomboctrlsetpopupextents}
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\func{void}{SetPopupExtents}{\param{int }{extLeft}, \param{int }{extRight}}
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Extends popup size horizontally, relative to the edges of the combo control.
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\wxheading{Parameters}
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\docparam{extLeft}{How many pixel to extend beyond the left edge of the
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control. Default is $0$.}
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\docparam{extRight}{How many pixel to extend beyond the right edge of the
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control. Default is $0$.}
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\wxheading{Remarks}
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Popup minimum width may override arguments.
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It is up to the popup to fully take this into account.
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\membersection{wxComboCtrl::SetPopupMaxHeight}\label{wxcomboctrlsetpopupmaxheight}
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\func{void}{SetPopupMaxHeight}{\param{int }{height}}
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Sets preferred maximum height of the popup.
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\wxheading{Remarks}
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Value -1 indicates the default.
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Also, popup implementation may choose to ignore this.
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\membersection{wxComboCtrl::SetPopupMinWidth}\label{wxcomboctrlsetpopupminwidth}
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\func{void}{SetPopupMinWidth}{\param{int }{width}}
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Sets minimum width of the popup. If wider than combo control, it will extend to the left.
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\wxheading{Remarks}
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Value -1 indicates the default.
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Also, popup implementation may choose to ignore this.
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\membersection{wxComboCtrl::SetSelection}\label{wxcomboctrlsetselection}
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\func{void}{SetSelection}{\param{long }{from}, \param{long }{to}}
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Selects the text between the two positions, in the combo control text field.
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\wxheading{Parameters}
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\docparam{from}{The first position.}
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\docparam{to}{The second position.}
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\membersection{wxComboCtrl::SetText}\label{wxcomboctrlsettext}
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\func{void}{SetText}{\param{const wxString\& }{value}}
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Sets the text for the text field without affecting the
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popup. Thus, unlike \helpref{SetValue}{wxcomboctrlsetvalue}, it works
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equally well with combo control using {\tt wxCB\_READONLY} style.
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\membersection{wxComboCtrl::SetTextIndent}\label{wxcomboctrlsettextindent}
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\func{void}{SetTextIndent}{\param{int }{indent}}
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This will set the space in pixels between left edge of the control and the
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text, regardless whether control is read-only or not. Value -1 can be
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given to indicate platform default.
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\membersection{wxComboCtrl::SetValue}\label{wxcomboctrlsetvalue}
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\func{void}{SetValue}{\param{const wxString\& }{value}}
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Sets the text for the combo control text field.
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{\bf NB:} For a combo control with {\tt wxCB\_READONLY} style the
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string must be accepted by the popup (for instance, exist in the dropdown
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list), otherwise the call to SetValue() is ignored
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\membersection{wxComboCtrl::SetValueWithEvent}\label{wxcomboctrlsetvaluewithevent}
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\func{void}{SetValueWithEvent}{\param{const wxString\& }{value}, \param{bool }{withEvent = true}}
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Same as SetValue, but also sends wxCommandEvent of type wxEVT\_COMMAND\_TEXT\_UPDATED
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if {\tt withEvent} is \true.
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\membersection{wxComboCtrl::ShowPopup}\label{wxcomboctrlshowpopup}
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\func{void}{ShowPopup}{\void}
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Show the popup.
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\membersection{wxComboCtrl::Undo}\label{wxcomboctrlundo}
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\func{void}{Undo}{\void}
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Undoes the last edit in the text field. Windows only.
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