///////////////////////////////////////////////////////////////////////////// // Name: progdlg.h // Purpose: interface of wxProgressDialog // Author: wxWidgets team // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #define wxPD_CAN_ABORT 0x0001 #define wxPD_APP_MODAL 0x0002 #define wxPD_AUTO_HIDE 0x0004 #define wxPD_ELAPSED_TIME 0x0008 #define wxPD_ESTIMATED_TIME 0x0010 #define wxPD_SMOOTH 0x0020 #define wxPD_REMAINING_TIME 0x0040 #define wxPD_CAN_SKIP 0x0080 /** @class wxGenericProgressDialog This class represents a dialog that shows a short message and a progress bar. Optionally, it can display ABORT and SKIP buttons, and the elapsed, remaining and estimated time for the end of the progress. This class provides a generic implementation of the progress dialog. If the platform has a native progress dialog available then it will be accessible using the @a wxProgressDialog class, otherwise it will essentially be the same as this class. Note that you must be aware that wxProgressDialog internally calls wxEventLoopBase::YieldFor with @c wxEVT_CATEGORY_UI and @c wxEVT_CATEGORY_USER_INPUT and this may cause unwanted re-entrancies or the out-of-order processing of pending events (to help preventing the last problem if you're using wxProgressDialog in a multi-threaded application you should be sure to use wxThreadEvent for your inter-threads communications). Although wxProgressDialog is not really modal, it should be created on the stack, and not the heap, as other modal dialogs, e.g. use it like this: @code void MyFrame::SomeFunc() { wxProgressDialog dialog(...); for ( int i = 0; i < 100; ++i ) { if ( !dialog.Update(i)) { // Cancelled by user. break; } ... do something time-consuming (but not too much) ... } } @endcode Note that this becomes even more important if the dialog is instantiated during the program initialization, e.g. from wxApp::OnInit(): the dialog must be destroyed before the main event loop is started in this case. @beginStyleTable @style{wxPD_APP_MODAL} Make the progress dialog application-modal, i.e. disable all application windows while it is shown. If this flag is not given, it is only "locally" modal -- that is the input to the parent window is disabled, but not to the other ones. @style{wxPD_AUTO_HIDE} Causes the progress dialog to disappear from screen as soon as the maximum value of the progress meter has been reached. If this style is not present, the dialog will become a modal dialog (see wxDialog::ShowModal) once the maximum value has been reached and wait for the user to dismiss it. @style{wxPD_SMOOTH} Causes smooth progress of the gauge control (uses a wxGauge with the @c wxGA_SMOOTH style). @style{wxPD_CAN_ABORT} This flag tells the dialog that it should have a "Cancel" button which the user may press. If this happens, the next call to Update() will return @false. @style{wxPD_CAN_SKIP} This flag tells the dialog that it should have a "Skip" button which the user may press. If this happens, the next call to Update() will return @true in its skip parameter. @style{wxPD_ELAPSED_TIME} This flag tells the dialog that it should show elapsed time (since creating the dialog). @style{wxPD_ESTIMATED_TIME} This flag tells the dialog that it should show estimated time. @style{wxPD_REMAINING_TIME} This flag tells the dialog that it should show remaining time. @endStyleTable @library{wxcore} @category{cmndlg} */ class wxGenericProgressDialog : public wxDialog { public: /** Constructor. Creates the dialog, displays it and disables user input for other windows, or, if @c wxPD_APP_MODAL flag is not given, for its parent window only. @param title Dialog title to show in titlebar. @param message Message displayed above the progress bar. @param maximum Maximum value for the progress bar. In the generic implementation the progress bar is constructed only if this value is greater than zero. @param parent Parent window. It will be disabled while this dialog is shown if non-null (whether @c wxPD_APP_MODAL is specified or not). Note that if you specify null parent and don't use @c wxPD_APP_MODAL, you need to take care to avoid reentrancies, i.e. avoiding showing the progress dialog again while this one is shown. @param style The dialog style. See wxProgressDialog. */ wxGenericProgressDialog(const wxString& title, const wxString& message, int maximum = 100, wxWindow* parent = NULL, int style = wxPD_AUTO_HIDE | wxPD_APP_MODAL); /** Destructor. Deletes the dialog and enables all top level windows. */ virtual ~wxGenericProgressDialog(); /** Returns the last value passed to the Update() function or @c wxNOT_FOUND if the dialog has no progress bar. @since 2.9.0 */ int GetValue() const; /** Returns the maximum value of the progress meter, as passed to the constructor or @c wxNOT_FOUND if the dialog has no progress bar. @since 2.9.0 */ int GetRange() const; /** Returns the last message passed to the Update() function; if you always passed wxEmptyString to Update() then the message set through the constructor is returned. @since 2.9.0 */ wxString GetMessage() const; /** Like Update() but makes the gauge control run in indeterminate mode. In indeterminate mode the remaining and the estimated time labels (if present) are set to "Unknown" or to @a newmsg (if it's non-empty). Each call to this function moves the progress bar a bit to indicate that some progress was done. @see wxGauge::Pulse(), Update() */ virtual bool Pulse(const wxString& newmsg = wxEmptyString, bool* skip = NULL); /** Can be used to continue with the dialog, after the user had clicked the "Abort" button. */ void Resume(); /** Changes the maximum value of the progress meter given in the constructor. This function can only be called (with a positive value) if the value passed in the constructor was positive. @since 2.9.1 */ void SetRange(int maximum); /** Returns true if the "Cancel" button was pressed. Normally a Cancel button press is indicated by Update() returning @false but sometimes it may be more convenient to check if the dialog was cancelled from elsewhere in the code and this function allows doing it. It always returns @false if the Cancel button is not shown at all. @since 2.9.1 */ bool WasCancelled() const; /** Returns true if the "Skip" button was pressed. This is similar to WasCancelled() but returns @true if the "Skip" button was pressed, not the "Cancel" one. @since 2.9.1 */ bool WasSkipped() const; /** Updates the dialog, setting the progress bar to the new value and updating the message if new one is specified. Returns @true unless the "Cancel" button has been pressed. If @false is returned, the application can either immediately destroy the dialog or ask the user for the confirmation and if the abort is not confirmed the dialog may be resumed with Resume() function. If @a value is the maximum value for the dialog, the behaviour of the function depends on whether @c wxPD_AUTO_HIDE was used when the dialog was created. If it was, the dialog is hidden and the function returns immediately. If it was not, the dialog becomes a modal dialog and waits for the user to dismiss it, meaning that this function does not return until this happens. Notice that if @a newmsg is longer than the currently shown message, the dialog will be automatically made wider to account for it. However if the new message is shorter than the previous one, the dialog doesn't shrink back to avoid constant resizes if the message is changed often. To do this and fit the dialog to its current contents you may call Fit() explicitly. However the native MSW implementation of this class does make the dialog shorter if the new text has fewer lines of text than the old one, so it is recommended to keep the number of lines of text constant in order to avoid jarring dialog size changes. You may also want to make the initial message, specified when creating the dialog, wide enough to avoid having to resize the dialog later, e.g. by appending a long string of unbreakable spaces (@c wxString(L'\\u00a0', 100)) to it. @param value The new value of the progress meter. It should be less than or equal to the maximum value given to the constructor. @param newmsg The new messages for the progress dialog text, if it is empty (which is the default) the message is not changed. @param skip If "Skip" button was pressed since last Update() call, this is set to @true. */ virtual bool Update(int value, const wxString& newmsg = wxEmptyString, bool* skip = NULL); }; /** @class wxProgressDialog If supported by the platform this class will provide the platform's native progress dialog, else it will simply be the @a wxGenericProgressDialog. */ class wxProgressDialog : public wxGenericProgressDialog { public: wxProgressDialog( const wxString& title, const wxString& message, int maximum = 100, wxWindow *parent = NULL, int style = wxPD_APP_MODAL | wxPD_AUTO_HIDE ); };