413abb066e
Add wxFileDialog::GetCurrentlySelectedFilterIndex() similar to the existing GetCurrentlySelectedFilename(), which can be used to retrieve the index of the currently selected filter and update the state of the extra controls in wxFileDialog accordingly. Implement this for wxMSW only by updating the internally stored value from the native CDN_TYPECHANGE notification and also generating a wxEVT_UPDATE_UI event to allow the extra controls to update themselves. Closes https://github.com/wxWidgets/wxWidgets/pull/1310
465 lines
16 KiB
Objective-C
465 lines
16 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: filedlg.h
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// Purpose: interface of wxFileDialog
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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enum
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{
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wxFD_OPEN = 0x0001,
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wxFD_SAVE = 0x0002,
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wxFD_OVERWRITE_PROMPT = 0x0004,
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wxFD_NO_FOLLOW = 0x0008,
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wxFD_FILE_MUST_EXIST = 0x0010,
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wxFD_CHANGE_DIR = 0x0080,
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wxFD_PREVIEW = 0x0100,
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wxFD_MULTIPLE = 0x0200
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};
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#define wxFD_DEFAULT_STYLE wxFD_OPEN
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/**
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Default wildcard string used in wxFileDialog corresponding to all files.
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It is defined as "*.*" under MSW and "*" everywhere else.
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*/
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const char wxFileSelectorDefaultWildcardStr[];
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/**
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@class wxFileDialog
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This class represents the file chooser dialog.
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The path and filename are distinct elements of a full file pathname.
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If path is ::wxEmptyString, the current directory will be used.
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If filename is ::wxEmptyString, no default filename will be supplied.
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The wildcard determines what files are displayed in the file selector,
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and file extension supplies a type extension for the required filename.
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The typical usage for the open file dialog is:
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@code
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void MyFrame::OnOpen(wxCommandEvent& WXUNUSED(event))
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{
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if (...current content has not been saved...)
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{
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if (wxMessageBox(_("Current content has not been saved! Proceed?"), _("Please confirm"),
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wxICON_QUESTION | wxYES_NO, this) == wxNO )
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return;
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//else: proceed asking to the user the new file to open
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}
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wxFileDialog
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openFileDialog(this, _("Open XYZ file"), "", "",
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"XYZ files (*.xyz)|*.xyz", wxFD_OPEN|wxFD_FILE_MUST_EXIST);
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if (openFileDialog.ShowModal() == wxID_CANCEL)
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return; // the user changed idea...
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// proceed loading the file chosen by the user;
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// this can be done with e.g. wxWidgets input streams:
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wxFileInputStream input_stream(openFileDialog.GetPath());
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if (!input_stream.IsOk())
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{
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wxLogError("Cannot open file '%s'.", openFileDialog.GetPath());
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return;
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}
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...
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}
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@endcode
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The typical usage for the save file dialog is instead somewhat simpler:
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@code
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void MyFrame::OnSaveAs(wxCommandEvent& WXUNUSED(event))
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{
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wxFileDialog
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saveFileDialog(this, _("Save XYZ file"), "", "",
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"XYZ files (*.xyz)|*.xyz", wxFD_SAVE|wxFD_OVERWRITE_PROMPT);
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if (saveFileDialog.ShowModal() == wxID_CANCEL)
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return; // the user changed idea...
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// save the current contents in the file;
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// this can be done with e.g. wxWidgets output streams:
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wxFileOutputStream output_stream(saveFileDialog.GetPath());
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if (!output_stream.IsOk())
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{
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wxLogError("Cannot save current contents in file '%s'.", saveFileDialog.GetPath());
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return;
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}
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...
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}
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@endcode
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@remarks
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All implementations of the wxFileDialog provide a wildcard filter. Typing a filename
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containing wildcards (*, ?) in the filename text item, and clicking on Ok, will
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result in only those files matching the pattern being displayed.
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The wildcard may be a specification for multiple types of file with a description
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for each, such as:
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@code
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"BMP and GIF files (*.bmp;*.gif)|*.bmp;*.gif|PNG files (*.png)|*.png"
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@endcode
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It must be noted that wildcard support in the native Motif file dialog is quite
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limited: only one file type is supported, and it is displayed without the
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descriptive test; "BMP files (*.bmp)|*.bmp" is displayed as "*.bmp", and both
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"BMP files (*.bmp)|*.bmp|GIF files (*.gif)|*.gif" and "Image files|*.bmp;*.gif"
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are errors.
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@beginStyleTable
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@style{wxFD_DEFAULT_STYLE}
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Equivalent to @c wxFD_OPEN.
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@style{wxFD_OPEN}
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This is an open dialog; usually this means that the default
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button's label of the dialog is "Open". Cannot be combined with @c wxFD_SAVE.
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@style{wxFD_SAVE}
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This is a save dialog; usually this means that the default button's
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label of the dialog is "Save". Cannot be combined with @c wxFD_OPEN.
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@style{wxFD_OVERWRITE_PROMPT}
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For save dialog only: prompt for a confirmation if a file will be
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overwritten.
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@style{wxFD_NO_FOLLOW}
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Directs the dialog to return the path and file name of the selected
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shortcut file, not its target as it does by default. Currently this
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flag is only implemented in wxMSW and the non-dereferenced link path
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is always returned, even without this flag, under Unix and so using
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it there doesn't do anything. This flag was added in wxWidgets
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3.1.0.
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@style{wxFD_FILE_MUST_EXIST}
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For open dialog only: the user may only select files that actually
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exist. Notice that under OS X the file dialog with @c wxFD_OPEN
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style always behaves as if this style was specified, because it is
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impossible to choose a file that doesn't exist from a standard OS X
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file dialog.
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@style{wxFD_MULTIPLE}
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For open dialog only: allows selecting multiple files.
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@style{wxFD_CHANGE_DIR}
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Change the current working directory (when the dialog is dismissed)
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to the directory where the file(s) chosen by the user are.
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@style{wxFD_PREVIEW}
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Show the preview of the selected files (currently only supported by
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wxGTK).
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@endStyleTable
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@library{wxcore}
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@category{cmndlg}
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@see @ref overview_cmndlg_file, ::wxFileSelector()
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*/
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class wxFileDialog : public wxDialog
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{
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public:
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/**
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Constructor. Use ShowModal() to show the dialog.
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@param parent
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Parent window.
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@param message
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Message to show on the dialog.
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@param defaultDir
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The default directory, or the empty string.
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@param defaultFile
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The default filename, or the empty string.
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@param wildcard
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A wildcard, such as "*.*" or "BMP files (*.bmp)|*.bmp|GIF files (*.gif)|*.gif".
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Note that the native Motif dialog has some limitations with respect to
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wildcards; see the Remarks section above.
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@param style
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A dialog style. See @c wxFD_* styles for more info.
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@param pos
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Dialog position. Not implemented.
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@param size
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Dialog size. Not implemented.
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@param name
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Dialog name. Not implemented.
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*/
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wxFileDialog(wxWindow* parent,
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const wxString& message = wxFileSelectorPromptStr,
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const wxString& defaultDir = wxEmptyString,
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const wxString& defaultFile = wxEmptyString,
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const wxString& wildcard = wxFileSelectorDefaultWildcardStr,
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long style = wxFD_DEFAULT_STYLE,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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const wxString& name = wxFileDialogNameStr);
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/**
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Destructor.
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*/
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virtual ~wxFileDialog();
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/**
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Returns the path of the file currently selected in dialog.
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Notice that this file is not necessarily going to be accepted by the
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user, so calling this function mostly makes sense from an update UI
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event handler of a custom file dialog extra control to update its state
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depending on the currently selected file.
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Currently this function is fully implemented under GTK and MSW and
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always returns an empty string elsewhere.
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@since 2.9.5
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@return The path of the currently selected file or an empty string if
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nothing is selected.
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@see SetExtraControlCreator()
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*/
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virtual wxString GetCurrentlySelectedFilename() const;
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/**
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Returns the file type filter index currently selected in dialog.
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Notice that this file type filter is not necessarily going to be the
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one finally accepted by the user, so calling this function mostly makes
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sense from an update UI event handler of a custom file dialog extra
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control to update its state depending on the currently selected file
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type filter.
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Currently this function is fully implemented only under MSW and
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always returns @c wxNOT_FOUND elsewhere.
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@since 3.1.3
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@return The 0-based index of the currently selected file type filter or
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wxNOT_FOUND if nothing is selected.
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@see SetExtraControlCreator()
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@see GetFilterIndex()
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@see SetFilterIndex()
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*/
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virtual int GetCurrentlySelectedFilterIndex () const;
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/**
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Returns the default directory.
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*/
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virtual wxString GetDirectory() const;
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/**
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If functions SetExtraControlCreator() and ShowModal() were called,
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returns the extra window. Otherwise returns @NULL.
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@since 2.9.0
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*/
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wxWindow* GetExtraControl() const;
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/**
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Returns the default filename.
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*/
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virtual wxString GetFilename() const;
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/**
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Fills the array @a filenames with the names of the files chosen.
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This function should only be used with the dialogs which have @c wxFD_MULTIPLE style,
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use GetFilename() for the others.
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Note that under Windows, if the user selects shortcuts, the filenames
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include paths, since the application cannot determine the full path
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of each referenced file by appending the directory containing the shortcuts
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to the filename.
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*/
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virtual void GetFilenames(wxArrayString& filenames) const;
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/**
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Returns the index into the list of filters supplied, optionally, in the
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wildcard parameter.
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Before the dialog is shown, this is the index which will be used when the
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dialog is first displayed.
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After the dialog is shown, this is the index selected by the user.
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*/
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virtual int GetFilterIndex() const;
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/**
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Returns the message that will be displayed on the dialog.
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*/
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virtual wxString GetMessage() const;
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/**
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Returns the full path (directory and filename) of the selected file.
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*/
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virtual wxString GetPath() const;
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/**
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Fills the array @a paths with the full paths of the files chosen.
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This function should only be used with the dialogs which have @c wxFD_MULTIPLE style,
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use GetPath() for the others.
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*/
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virtual void GetPaths(wxArrayString& paths) const;
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/**
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Returns the file dialog wildcard.
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*/
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virtual wxString GetWildcard() const;
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/**
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Sets the default directory.
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*/
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virtual void SetDirectory(const wxString& directory);
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/**
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The type of function used as an argument for SetExtraControlCreator().
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@since 2.9.0
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*/
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typedef wxWindow *(*ExtraControlCreatorFunction)(wxWindow*);
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/**
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Customize file dialog by adding extra window, which is typically placed
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below the list of files and above the buttons.
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SetExtraControlCreator() can be called only once, before calling ShowModal().
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The @c creator function should take pointer to parent window (file dialog)
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and should return a window allocated with operator new.
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@since 2.9.0
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*/
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bool SetExtraControlCreator(ExtraControlCreatorFunction creator);
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/**
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Sets the default filename.
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In wxGTK this will have little effect unless a default directory has previously been set.
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*/
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virtual void SetFilename(const wxString& setfilename);
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/**
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Sets the default filter index, starting from zero.
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*/
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virtual void SetFilterIndex(int filterIndex);
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/**
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Sets the message that will be displayed on the dialog.
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*/
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virtual void SetMessage(const wxString& message);
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/**
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Sets the path (the combined directory and filename that will be returned when
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the dialog is dismissed).
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*/
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virtual void SetPath(const wxString& path);
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/**
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Sets the wildcard, which can contain multiple file types, for example:
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"BMP files (*.bmp)|*.bmp|GIF files (*.gif)|*.gif".
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Note that the native Motif dialog has some limitations with respect to
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wildcards; see the Remarks section above.
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*/
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virtual void SetWildcard(const wxString& wildCard);
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/**
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Shows the dialog, returning @c wxID_OK if the user pressed OK, and @c wxID_CANCEL
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otherwise.
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*/
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virtual int ShowModal();
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};
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// ============================================================================
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// Global functions/macros
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// ============================================================================
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/** @addtogroup group_funcmacro_dialog */
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//@{
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/**
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Pops up a file selector box. In Windows, this is the common file selector
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dialog. In X, this is a file selector box with the same functionality. The
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path and filename are distinct elements of a full file pathname. If path
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is empty, the current directory will be used. If filename is empty, no
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default filename will be supplied. The wildcard determines what files are
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displayed in the file selector, and file extension supplies a type
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extension for the required filename. Flags may be a combination of
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wxFD_OPEN, wxFD_SAVE, wxFD_OVERWRITE_PROMPT or wxFD_FILE_MUST_EXIST.
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@note wxFD_MULTIPLE can only be used with wxFileDialog and not here since
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this function only returns a single file name.
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Both the Unix and Windows versions implement a wildcard filter. Typing a
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filename containing wildcards (*, ?) in the filename text item, and
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clicking on Ok, will result in only those files matching the pattern being
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displayed.
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The wildcard may be a specification for multiple types of file with a
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description for each, such as:
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@code
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"BMP files (*.bmp)|*.bmp|GIF files (*.gif)|*.gif"
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@endcode
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The application must check for an empty return value (the user pressed
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Cancel). For example:
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@code
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wxString filename = wxFileSelector("Choose a file to open");
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if ( !filename.empty() )
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{
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// work with the file
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...
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}
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//else: cancelled by user
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@endcode
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@header{wx/filedlg.h}
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*/
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wxString wxFileSelector(const wxString& message,
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const wxString& default_path = wxEmptyString,
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const wxString& default_filename = wxEmptyString,
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const wxString& default_extension = wxEmptyString,
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const wxString& wildcard = wxFileSelectorDefaultWildcardStr,
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int flags = 0,
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wxWindow* parent = NULL,
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int x = wxDefaultCoord,
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int y = wxDefaultCoord);
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/**
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An extended version of wxFileSelector()
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@header{wx/filedlg.h}
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*/
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wxString wxFileSelectorEx(const wxString& message = wxFileSelectorPromptStr,
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const wxString& default_path = wxEmptyString,
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const wxString& default_filename = wxEmptyString,
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int *indexDefaultExtension = NULL,
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const wxString& wildcard = wxFileSelectorDefaultWildcardStr,
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int flags = 0,
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wxWindow *parent = NULL,
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int x = wxDefaultCoord,
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int y = wxDefaultCoord);
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/**
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Shows a file dialog asking the user for a file name for opening a file.
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@see wxFileSelector(), wxFileDialog
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@header{wx/filedlg.h}
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*/
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wxString wxLoadFileSelector(const wxString& what,
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const wxString& extension,
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const wxString& default_name = wxEmptyString,
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wxWindow *parent = NULL);
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/**
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Shows a file dialog asking the user for a file name for saving a file.
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@see wxFileSelector(), wxFileDialog
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@header{wx/filedlg.h}
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*/
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wxString wxSaveFileSelector(const wxString& what,
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const wxString& extension,
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const wxString& default_name = wxEmptyString,
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wxWindow *parent = NULL);
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//@}
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