Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 6/29/2011 6:16 PM, Baz Walter wrote: On 29/06/11 18:57, Nathan Weston wrote: On 6/29/2011 1:32 PM, Baz Walter wrote: going back to your earlier example of dragging in the line-edit to change its value: all you need to do is clearFocus() when the drag starts and setFocus() when the drag ends. that way, whilst the drag is in progress, the line-edit's shortcuts won't work, but your global shortcuts will. if that's not what you want, please try to make it clear what you do want (i.e. with a working example). [snip] Now, when the widget is in its non-editable state, and the user hits Ctrl-Z, I want it to trigger the Undo action on the Edit menu. Unfortunately, QLineEdit intercepts the Ctrl-Z keystroke and does nothing (because it's not editable). the example you posted earlier works (i.e. Ctrl+Z prints 'action') if the Foo widget has been set as read-only. (nb: the setShortcutContext line also needs to be commented out) Interesting... it works as you say on my Linux machine at home, but not on my Windows machine at work. The Windows machine has Qt 4.6.2, I don't know about the Linux machine off the top of my head. What platform/Qt version are you testing on? I can't call clearFocus() at the end of the drag, because this would break the Up/Down arrow shortcuts. call clearFocus() at the *start* of the drag, setFocus() at the *end*. I don't see how that would help... after the drag, the line-edit will have focus again, and will eat the Ctrl-Z shortcut. -- . . . . . . . . . . . . . . . . . . . . . . . . . Nathan Weston nat...@genarts.com GenArts, Inc. Tel: 617-492-2888 955 Mass. Ave Fax: 617-492-2852 Cambridge, MA 02139 USA www.genarts.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 6/30/2011 10:44 AM, Nathan Weston wrote: On 6/29/2011 6:16 PM, Baz Walter wrote: On 29/06/11 18:57, Nathan Weston wrote: On 6/29/2011 1:32 PM, Baz Walter wrote: going back to your earlier example of dragging in the line-edit to change its value: all you need to do is clearFocus() when the drag starts and setFocus() when the drag ends. that way, whilst the drag is in progress, the line-edit's shortcuts won't work, but your global shortcuts will. if that's not what you want, please try to make it clear what you do want (i.e. with a working example). [snip] Now, when the widget is in its non-editable state, and the user hits Ctrl-Z, I want it to trigger the Undo action on the Edit menu. Unfortunately, QLineEdit intercepts the Ctrl-Z keystroke and does nothing (because it's not editable). the example you posted earlier works (i.e. Ctrl+Z prints 'action') if the Foo widget has been set as read-only. (nb: the setShortcutContext line also needs to be commented out) Interesting... it works as you say on my Linux machine at home, but not on my Windows machine at work. The Windows machine has Qt 4.6.2, I don't know about the Linux machine off the top of my head. What platform/Qt version are you testing on? I updated to the latest Qt/PyQt and it's working now. My original application is working correctly as well. -- . . . . . . . . . . . . . . . . . . . . . . . . . Nathan Weston nat...@genarts.com GenArts, Inc. Tel: 617-492-2888 955 Mass. Ave Fax: 617-492-2852 Cambridge, MA 02139 USA www.genarts.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 30/06/11 16:56, Nathan Weston wrote: On 6/30/2011 10:44 AM, Nathan Weston wrote: On 6/29/2011 6:16 PM, Baz Walter wrote: I updated to the latest Qt/PyQt and it's working now. My original application is working correctly as well. glad you got it working. one final thought: rather stupidly, i completely forgot about QEvent.ShortcutOverride, which may well be exactly what you were originally looking for. it could be used something like this: def event(self, event): if (not self._editable and event.type() == QEvent.ShortcutOverride): return False return QLineEdit.event(self, event) better late than never, i suppose :/ ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
Wow, I can't describe epicness of this :) Didn't know such thing existed :) 2011/7/1 Baz Walter baz...@ftml.net On 30/06/11 16:56, Nathan Weston wrote: On 6/30/2011 10:44 AM, Nathan Weston wrote: On 6/29/2011 6:16 PM, Baz Walter wrote: I updated to the latest Qt/PyQt and it's working now. My original application is working correctly as well. glad you got it working. one final thought: rather stupidly, i completely forgot about QEvent.ShortcutOverride, which may well be exactly what you were originally looking for. it could be used something like this: def event(self, event): if (not self._editable and event.type() == QEvent.ShortcutOverride): return False return QLineEdit.event(self, event) better late than never, i suppose :/ ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import sys
class Foo(QLineEdit):
def keyPressEvent(self, event):
print 'Foo keyPress', event.key(); sys.stdout.flush()
QLineEdit.keyPressEvent(self, event)
app = QApplication([])
window = QMainWindow()
f = Foo()
window.setCentralWidget(f)
window.show()
def do_action():
print 'action'; sys.stdout.flush()
action1 = QAction('Action 1', f, triggered=do_action)
action1.setShortcut(Qt.CTRL + Qt.Key_Z)
action1.setShortcutContext(Qt.WidgetShortcut)
For actions that should work all over the mainwindow, you should use
Qt.WidgetWithChildren here.
Oops, that line was an artifact of an earlier experiment. I actually
tried every possible value for shortcutContext, none of them seem to
make a difference.
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Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 29/06/11 18:21, Nathan Weston wrote: On 6/29/2011 1:07 PM, Baz Walter wrote: as was suggested earlier in this thread, if the line-edit doesn't have the keyboard focus, it can't trigger its own shortcuts. if it *does* have the focus, but the shortcut sequence is not one it handles, the keypress event will be re-propagated (as happens with 'Ctrl+R' in your example). the simplest way to control the focus is to use clearFocus() and setFocus(). please reply to the list so that everyone can read your comments. Unfortunately, I need the line-edit to have keyboard focus (and respond to some keyboard shortcuts), without bashing my global menu shortcuts. It seems like there *should* be a clean way to do this by mucking around with the keyPressEvent, but so far nobody seems to know of one. did you actually try what was suggested? going back to your earlier example of dragging in the line-edit to change its value: all you need to do is clearFocus() when the drag starts and setFocus() when the drag ends. that way, whilst the drag is in progress, the line-edit's shortcuts won't work, but your global shortcuts will. if that's not what you want, please try to make it clear what you do want (i.e. with a working example). HTH ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 6/29/2011 1:32 PM, Baz Walter wrote: On 29/06/11 18:21, Nathan Weston wrote: On 6/29/2011 1:07 PM, Baz Walter wrote: as was suggested earlier in this thread, if the line-edit doesn't have the keyboard focus, it can't trigger its own shortcuts. if it *does* have the focus, but the shortcut sequence is not one it handles, the keypress event will be re-propagated (as happens with 'Ctrl+R' in your example). the simplest way to control the focus is to use clearFocus() and setFocus(). Unfortunately, I need the line-edit to have keyboard focus (and respond to some keyboard shortcuts), without bashing my global menu shortcuts. It seems like there *should* be a clean way to do this by mucking around with the keyPressEvent, but so far nobody seems to know of one. did you actually try what was suggested? going back to your earlier example of dragging in the line-edit to change its value: all you need to do is clearFocus() when the drag starts and setFocus() when the drag ends. that way, whilst the drag is in progress, the line-edit's shortcuts won't work, but your global shortcuts will. if that's not what you want, please try to make it clear what you do want (i.e. with a working example). Short answer: focus tricks won't work for me. I need the widget to be able to accept keyboard focus and respond to some keyboard shortcuts. Long answer: I guess this will require a complete specification of how my widget works. The widget appears to the user somewhat like a label displaying a number. If the user clicks and drags, the value will increase or decrease as the mouse is moved. By holding down modifier keys the user can adjust the speed with which the value changes. If the user clicks (but doesn't drag), the number is highlighted and a text editing cursor appears. The widget at this point behaves exactly like a QLineEdit (with a validator to force numeric values). When the user presses Enter or the widget loses focus, it reverts to its default appearance. If the widget has keyboard focus, but isn't in edit mode, the Up/Down arrow keys will nudge the value a small amount in either direction. I am implementing this as a subclass of QLineEdit, overriding mouse and keyboard events and throwing in some CSS to make it look nice. When the widget is in edit mode it's set to editable, otherwise it's set to non-editable. Now, when the widget is in its non-editable state, and the user hits Ctrl-Z, I want it to trigger the Undo action on the Edit menu. Unfortunately, QLineEdit intercepts the Ctrl-Z keystroke and does nothing (because it's not editable). I can't call clearFocus() at the end of the drag, because this would break the Up/Down arrow shortcuts. - Nathan ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 29/06/11 18:57, Nathan Weston wrote: On 6/29/2011 1:32 PM, Baz Walter wrote: going back to your earlier example of dragging in the line-edit to change its value: all you need to do is clearFocus() when the drag starts and setFocus() when the drag ends. that way, whilst the drag is in progress, the line-edit's shortcuts won't work, but your global shortcuts will. if that's not what you want, please try to make it clear what you do want (i.e. with a working example). [snip] Now, when the widget is in its non-editable state, and the user hits Ctrl-Z, I want it to trigger the Undo action on the Edit menu. Unfortunately, QLineEdit intercepts the Ctrl-Z keystroke and does nothing (because it's not editable). the example you posted earlier works (i.e. Ctrl+Z prints 'action') if the Foo widget has been set as read-only. (nb: the setShortcutContext line also needs to be commented out) I can't call clearFocus() at the end of the drag, because this would break the Up/Down arrow shortcuts. call clearFocus() at the *start* of the drag, setFocus() at the *end*. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
[PyQt] QLineEdit vs. menu keyboard shortcuts
QLineEdit has some keyboard shortcuts (e.g. Ctrl+Z for Undo) that clash with the shortcuts for QActions in my application menus. When a QLineEdit has keyboard focus, it intercepts these shortcuts and my QActions are never triggered. I'd like to give application-level shortcuts precedence over QLineEdit's shortcuts, but I can't seem to find a clean and general way to do this. Alternatively, is there a way to customize the keyboard shortcuts in QLineEdit? If I could disable some of the problematic shortcuts that would be a reasonable workaround. - Nathan ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 6/28/2011 1:48 PM, Baz Walter wrote: On 28/06/11 16:50, Nathan Weston wrote: QLineEdit has some keyboard shortcuts (e.g. Ctrl+Z for Undo) that clash with the shortcuts for QActions in my application menus. When a QLineEdit has keyboard focus, it intercepts these shortcuts and my QActions are never triggered. I'd like to give application-level shortcuts precedence over QLineEdit's shortcuts, but I can't seem to find a clean and general way to do this. Alternatively, is there a way to customize the keyboard shortcuts in QLineEdit? If I could disable some of the problematic shortcuts that would be a reasonable workaround. the default key bindings for QLineEdit are hard-coded, but the actual key sequences used are platform-dependent (and the same goes for most (all?) other widgets which have them). but what is your reason for wanting to change the default behaviour? as a user, i would expect all the 'normal' shortcuts to work when typing in a line edit. if Ctrl+Z undid something in some other widget that i wasn't looking at, it could become very confusing. (IIRC this was how things used to work with qt3 - and good riddance to that!). I have a subclass of QLineEdit for entering numbers. The user can either type in a number, or drag the mouse to increase/decrease the value, like a slider (similar widgets are often found in After Effects and other video editing software). In the latter mode, the widget is temporarily set as non-editable, so its built-in Undo behavior doesn't work at all (but it still eats the keyboard event!). -- . . . . . . . . . . . . . . . . . . . . . . . . . Nathan Weston nat...@genarts.com GenArts, Inc. Tel: 617-492-2888 955 Mass. Ave Fax: 617-492-2852 Cambridge, MA 02139 USA www.genarts.com ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On Tuesday 28 June 2011, 19:56:35 Nathan Weston wrote: On 6/28/2011 1:48 PM, Baz Walter wrote: On 28/06/11 16:50, Nathan Weston wrote: QLineEdit has some keyboard shortcuts (e.g. Ctrl+Z for Undo) that clash with the shortcuts for QActions in my application menus. When a QLineEdit has keyboard focus, it intercepts these shortcuts and my QActions are never triggered. I'd like to give application-level shortcuts precedence over QLineEdit's shortcuts, but I can't seem to find a clean and general way to do this. Alternatively, is there a way to customize the keyboard shortcuts in QLineEdit? If I could disable some of the problematic shortcuts that would be a reasonable workaround. the default key bindings for QLineEdit are hard-coded, but the actual key sequences used are platform-dependent (and the same goes for most (all?) other widgets which have them). but what is your reason for wanting to change the default behaviour? as a user, i would expect all the 'normal' shortcuts to work when typing in a line edit. if Ctrl+Z undid something in some other widget that i wasn't looking at, it could become very confusing. (IIRC this was how things used to work with qt3 - and good riddance to that!). I have a subclass of QLineEdit for entering numbers. The user can either type in a number, or drag the mouse to increase/decrease the value, like a slider (similar widgets are often found in After Effects and other video editing software). In the latter mode, the widget is temporarily set as non-editable, so its built-in Undo behavior doesn't work at all (but it still eats the keyboard event!). If you're subclassing QLineEdit anyway, what does stop you from overriding keyPressEvent to catch and accept() any unwanted key presses? Pete ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 28/06/11 19:17, Hans-Peter Jansen wrote: On Tuesday 28 June 2011, 19:56:35 Nathan Weston wrote: In the latter mode, the widget is temporarily set as non-editable, so its built-in Undo behavior doesn't work at all (but it still eats the keyboard event!). If you're subclassing QLineEdit anyway, what does stop you from overriding keyPressEvent to catch and accept() any unwanted key presses? it sounds like he might want to drag with the mouse and use keyboard shortcuts at the same time - otherwise, why worry about keyboard events? (then again, i might just have completely misunderstood :) ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] QLineEdit vs. menu keyboard shortcuts
On 28/06/11 19:28, Yaşar Arabacı wrote: On 28/06/11 19:17, Hans-Peter Jansen wrote: On Tuesday 28 June 2011, 19:56:35 Nathan Weston wrote: In the latter mode, the widget is temporarily set as non-editable, so its built-in Undo behavior doesn't work at all (but it still eats the keyboard event!). If you're subclassing QLineEdit anyway, what does stop you from overriding keyPressEvent to catch and accept() any unwanted key presses? it sounds like he might want to drag with the mouse and use keyboard shortcuts at the same time - otherwise, why worry about keyboard events? (then again, i might just have completely misunderstood :) How about setting focus policy to no focus. You can still use drag event but widget will never be focused therefore doesn't interfere with shortcuts. (re-posting this to the list) ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
