Relaying a message through several layers of child instances in Qt
I am writing a Qt application that has one main window containing a box intended for messages to the user. The main window also has a load of child, grand child, great-grand child a.s.o. widgets. I would like these offspring to be able to print into the main window's message box. I could set up such a path by implementing a print_message method that accesses the parent's print_message in each module up the family tree, so that a message gets relayed to the main window through all generations/instances. Is there a better way of doing this?
qt
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
add a comment |
I am writing a Qt application that has one main window containing a box intended for messages to the user. The main window also has a load of child, grand child, great-grand child a.s.o. widgets. I would like these offspring to be able to print into the main window's message box. I could set up such a path by implementing a print_message method that accesses the parent's print_message in each module up the family tree, so that a message gets relayed to the main window through all generations/instances. Is there a better way of doing this?
qt
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02
add a comment |
I am writing a Qt application that has one main window containing a box intended for messages to the user. The main window also has a load of child, grand child, great-grand child a.s.o. widgets. I would like these offspring to be able to print into the main window's message box. I could set up such a path by implementing a print_message method that accesses the parent's print_message in each module up the family tree, so that a message gets relayed to the main window through all generations/instances. Is there a better way of doing this?
qt
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
I am writing a Qt application that has one main window containing a box intended for messages to the user. The main window also has a load of child, grand child, great-grand child a.s.o. widgets. I would like these offspring to be able to print into the main window's message box. I could set up such a path by implementing a print_message method that accesses the parent's print_message in each module up the family tree, so that a message gets relayed to the main window through all generations/instances. Is there a better way of doing this?
qt
qt
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
asked Nov 22 '18 at 7:09
zeus300zeus300
3711317
3711317
You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02
add a comment |
You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02
You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02
You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02
add a comment |
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You could use signal/slot, any child would connect its own signal to a global slot that displays the given message (in a dedicated class like a singleton, or just with pointer of your main window you pass to all children).
– ymoreau
Nov 22 '18 at 9:02