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added 3-state checkboxes (patch 813790)

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23982 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-09-28 00:23:08 +00:00
parent b71531ad92
commit 8941fa8806
16 changed files with 547 additions and 37 deletions
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91
include/wx/checkbox.h
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@@ -18,7 +18,38 @@
#include "wx/control.h"
WXDLLEXPORT_DATA(extern const wxChar*) wxCheckBoxNameStr;
/*
* wxCheckBox style flags
* (Using wxCHK_* because wxCB_* is used by wxComboBox).
* Determine whether to use a 3-state or 2-state
* checkbox. 3-state enables to differentiate
* between 'unchecked', 'checked' and 'undetermined'.
*/
#define wxCHK_2STATE 0x0000
#define wxCHK_3STATE 0x1000
/*
* If this style is set the user can set the checkbox to the
* undetermined state. If not set the undetermined set can only
* be set programmatically.
* This style can only be used with 3 state checkboxes.
*/
#define wxCHK_ALLOW_3RD_STATE_FOR_USER 0x2000
/*
* The possible states of a 3-state checkbox (Compatible
* with the 2-state checkbox).
*/
enum wxCheckBoxState
{
wxCHK_UNCHECKED,
wxCHK_CHECKED,
wxCHK_UNDETERMINED /* 3-state checkbox only */
};
WXDLLEXPORT_DATA(extern const wxChar *) wxCheckBoxNameStr;
// ----------------------------------------------------------------------------
// wxCheckBox: a control which shows a label and a box which may be checked
@@ -30,10 +61,64 @@ public:
wxCheckBoxBase() { }
// set/get the checked status of the listbox
virtual void SetValue(bool value) = 0;
virtual void SetValue(const bool value) = 0;
virtual bool GetValue() const = 0;
bool IsChecked() const { return GetValue(); }
bool IsChecked() const
{
wxASSERT_MSG( !Is3State(), wxT("Calling IsChecked() doesn't make sense for")
wxT(" a three state checkbox, Use Get3StateValue() instead") );
return GetValue();
}
wxCheckBoxState Get3StateValue() const
{
wxCheckBoxState state = DoGet3StateValue();
if ( state == wxCHK_UNDETERMINED && !Is3State() )
{
// Undetermined state with a 2-state checkbox??
wxFAIL_MSG( wxT("DoGet3StateValue() says the 2-state checkbox is ")
wxT("in an undetermined/third state") );
state = wxCHK_UNCHECKED;
}
return state;
}
void Set3StateValue(wxCheckBoxState state)
{
if ( state == wxCHK_UNDETERMINED && !Is3State() )
{
wxFAIL_MSG(wxT("Setting a 2-state checkbox to undetermined state"));
state = wxCHK_UNCHECKED;
}
DoSet3StateValue(state);
}
bool Is3State() const
{
return (m_style & wxCHK_3STATE) != 0;
}
bool Is3rdStateAllowedForUser() const
{
return (m_style & wxCHK_ALLOW_3RD_STATE_FOR_USER) != 0;
}
protected:
int m_style;
virtual void DoSet3StateValue(wxCheckBoxState WXUNUSED(state)) { wxFAIL; }
virtual wxCheckBoxState DoGet3StateValue() const
{
wxFAIL;
return wxCHK_UNCHECKED;
}
private:
DECLARE_NO_COPY_CLASS(wxCheckBoxBase)