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Diffstat (limited to 'Demo/stdwin/miniedit.py')
| -rwxr-xr-x | Demo/stdwin/miniedit.py | 356 |
1 files changed, 0 insertions, 356 deletions
diff --git a/Demo/stdwin/miniedit.py b/Demo/stdwin/miniedit.py deleted file mode 100755 index 9a11c2d..0000000 --- a/Demo/stdwin/miniedit.py +++ /dev/null @@ -1,356 +0,0 @@ -#! /usr/bin/env python - -# A miniature multi-window editor using STDWIN's text objects. -# -# Usage: miniedit [file] ... -# -# The user interface is similar to that of the miniedit demo application -# in C that comes with STDWIN. -# -# XXX need to comment the functions -# XXX Not yet implemented: -# disabling menu entries for inapplicable actions -# Find operations - - -import sys -import stdwin -from stdwinevents import * - - -# Constant: list of WE_COMMAND events that (may) change the text buffer -# so we can decide whether to set the 'changed' flag. -# Note that it is possible for such a command to fail (a backspace -# at the beginning of the buffer) but we'll set the changed flag anyway -# -- it's too complicated to check this condition right now. -# -changing = [WC_RETURN, WC_TAB, WC_BACKSPACE] - - -# The list of currently open windows; -# this is maintained so we can stop when there are no windows left -# -windows = [] - - -# A note on window data attributes (set by open_window): -# -# w.textobject the window's text object -# w.changed true when the window's text is changed -# w.filename filename connected to the window; '' if none - - -# Main program -# -def main(): - # - # Set a reasonable default window size. - # If we are using a fixed-width font this will open a 80x24 window; - # for variable-width fonts we approximate this based on an average - # - stdwin.setdefwinsize(40*stdwin.textwidth('in'), 24*stdwin.lineheight()) - # - # Create global menus (as local variables) - # - filemenu = make_file_menu(stdwin) - editmenu = make_edit_menu(stdwin) - findmenu = make_find_menu(stdwin) - # - # Get the list of files from the command line (maybe none) - # - files = sys.argv[1:] - # - # Open any files -- errors will be reported but do won't stop us - # - for filename in files: - open_file(filename) - # - # If there were no files, or none of them could be opened, - # put up a dialog asking for a filename - # - if not windows: - try: - open_dialog(None) - except KeyboardInterrupt: - pass # User cancelled - # - # If the dialog was cancelled, create an empty new window - # - if not windows: - new_window(None) - # - # Main event loop -- stop when we have no open windows left - # - while windows: - # - # Get the next event -- ignore interrupts - # - try: - type, window, detail = event = stdwin.getevent() - except KeyboardInterrupt: - type, window, detail = event = WE_NONE, None, None - # - # Event decoding switch - # - if not window: - pass # Ignore such events - elif type == WE_MENU: - # - # Execute menu operation - # - menu, item = detail - try: - menu.actions[item](window) - except KeyboardInterrupt: - pass # User cancelled - elif type == WE_CLOSE: - # - # Close a window - # - try: - close_dialog(window) - except KeyboardInterrupt: - pass # User cancelled - elif type == WE_SIZE: - # - # A window was resized -- - # let the text object recompute the line breaks - # and change the document size accordingly, - # so scroll bars will work - # - fix_textsize(window) - elif window.textobject.event(event): - # - # The event was eaten by the text object -- - # set the changed flag if not already set - # - if type == WE_CHAR or \ - type == WE_COMMAND and detail in changing: - window.changed = 1 - fix_docsize(window) - # - # Delete all objects that may still reference the window - # in the event -- this is needed otherwise the window - # won't actually be closed and may receive further - # events, which will confuse the event decoder - # - del type, window, detail, event - - -def make_file_menu(object): - menu = object.menucreate('File') - menu.actions = [] - additem(menu, 'New', 'N', new_window) - additem(menu, 'Open..', 'O', open_dialog) - additem(menu, '', '', None) - additem(menu, 'Save', 'S', save_dialog) - additem(menu, 'Save As..', '', save_as_dialog) - additem(menu, 'Save a Copy..', '', save_copy_dialog) - additem(menu, 'Revert', 'R', revert_dialog) - additem(menu, 'Quit', 'Q', quit_dialog) - return menu - - -def make_edit_menu(object): - menu = object.menucreate('Edit') - menu.actions = [] - additem(menu, 'Cut', 'X', do_cut) - additem(menu, 'Copy', 'C', do_copy) - additem(menu, 'Paste', 'V', do_paste) - additem(menu, 'Clear', 'B', do_clear) - additem(menu, 'Select All', 'A', do_select_all) - return menu - - -def make_find_menu(object): - menu = object.menucreate('Find') - menu.actions = [] - # XXX - return menu - - -def additem(menu, text, shortcut, function): - if shortcut: - menu.additem(text, shortcut) - else: - menu.additem(text) - menu.actions.append(function) - - -def open_dialog(current_ignored): - filename = stdwin.askfile('Open file:', '', 0) - open_file(filename) - - -def open_file(filename): - try: - fp = open(filename, 'r') - except RuntimeError: - stdwin.message(filename + ': cannot open') - return # Error, forget it - try: - contents = fp.read() - except RuntimeError: - stdwin.message(filename + ': read error') - return # Error, forget it - del fp # Close the file - open_window(filename, filename, contents) - - -def new_window(current_ignored): - open_window('', 'Untitled', '') - - -def open_window(filename, title, contents): - try: - window = stdwin.open(title) - except RuntimeError: - stdwin.message('cannot open new window') - return # Error, forget it - window.textobject = window.textcreate((0, 0), window.getwinsize()) - window.textobject.settext(contents) - window.changed = 0 - window.filename = filename - fix_textsize(window) - windows.append(window) - - -def quit_dialog(window): - for window in windows[:]: - close_dialog(window) - - -def close_dialog(window): - if window.changed: - prompt = 'Save changes to ' + window.gettitle() + ' ?' - if stdwin.askync(prompt, 1): - save_dialog(window) - if window.changed: - return # Save failed (not) cancelled - windows.remove(window) - del window.textobject - - -def save_dialog(window): - if not window.filename: - save_as_dialog(window) - return - if save_file(window, window.filename): - window.changed = 0 - - -def save_as_dialog(window): - prompt = 'Save ' + window.gettitle() + ' as:' - filename = stdwin.askfile(prompt, window.filename, 1) - if save_file(window, filename): - window.filename = filename - window.settitle(filename) - window.changed = 0 - - -def save_copy_dialog(window): - prompt = 'Save a copy of ' + window.gettitle() + ' as:' - filename = stdwin.askfile(prompt, window.filename, 1) - void = save_file(window, filename) - - -def save_file(window, filename): - try: - fp = open(filename, 'w') - except RuntimeError: - stdwin.message(filename + ': cannot create') - return 0 - contents = window.textobject.gettext() - try: - fp.write(contents) - except RuntimeError: - stdwin.message(filename + ': write error') - return 0 - return 1 - - -def revert_dialog(window): - if not window.filename: - stdwin.message('This window has no file to revert from') - return - if window.changed: - prompt = 'Really read ' + window.filename + ' back from file?' - if not stdwin.askync(prompt, 1): - return - try: - fp = open(window.filename, 'r') - except RuntimeError: - stdwin.message(filename + ': cannot open') - return - contents = fp.read() - del fp # Close the file - window.textobject.settext(contents) - window.changed = 0 - fix_docsize(window) - - -def fix_textsize(window): - corner = window.getwinsize() - area = (0, 0), (corner) - window.textobject.move(area) - fix_docsize(window) - - -def fix_docsize(window): - area = window.textobject.getrect() - origin, corner = area - width, height = corner - window.setdocsize(0, height) - - -def do_cut(window): - selection = window.textobject.getfocustext() - if not selection: - stdwin.fleep() # Nothing to cut - elif not window.setselection(WS_PRIMARY, selection): - stdwin.fleep() # Window manager glitch... - else: - stdwin.rotatecutbuffers(1) - stdwin.setcutbuffer(0, selection) - window.textobject.replace('') - window.changed = 1 - fix_docsize(window) - - -def do_copy(window): - selection = window.textobject.getfocustext() - if not selection: - stdwin.fleep() # Nothing to cut - elif not window.setselection(WS_PRIMARY, selection): - stdwin.fleep() # Window manager glitch... - else: - stdwin.rotatecutbuffers(1) - stdwin.setcutbuffer(0, selection) - - -def do_paste(window): - selection = stdwin.getselection(WS_PRIMARY) - if not selection: - selection = stdwin.getcutbuffer(0) - if not selection: - stdwin.fleep() # Nothing to paste - else: - window.textobject.replace(selection) - window.changed = 1 - fix_docsize(window) - -def do_clear(window): - first, last = window.textobject.getfocus() - if first == last: - stdwin.fleep() # Nothing to clear - else: - window.textobject.replace('') - window.changed = 1 - fix_docsize(window) - - -def do_select_all(window): - window.textobject.setfocus(0, 0x7fffffff) # XXX Smaller on the Mac! - - -main() |