From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/motif-walkthrough-2.html | 101 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) create mode 100644 doc/html/motif-walkthrough-2.html (limited to 'doc/html/motif-walkthrough-2.html') diff --git a/doc/html/motif-walkthrough-2.html b/doc/html/motif-walkthrough-2.html new file mode 100644 index 0000000..59b1151 --- /dev/null +++ b/doc/html/motif-walkthrough-2.html @@ -0,0 +1,101 @@ + + + + + +Preparing to Migrate the User Interface + + + + + + + +

Preparing to Migrate the User Interface

+ + + +[ Previous: Getting Started ] +[ Home ] +[ Next: Using Qt Standard Dialogs ] +

We are ready to start migrating the user interface for our project. +As mentioned in the introduction, we do this in steps, ensuring that +our application is still usable at every step of the migration process. +

The user interface can be viewed as a hierarchy; each top-level window +and dialog depends upon a parent (which is another top-level window or +dialog). When using Motif XmMainWindow widgets, these should be +viewed as two separate entities: the Main Window widget with the +popup-menu hierarchy and the View widget contained in the Main Window widget. The View widget depends on the Main Window +widget. +

We begin migrating the pieces that have no dependencies, and work our +way up the dependency tree until all the pieces have been migrated. +

The hierarchy for this project looks something like this: +

We will begin by migrating and replacing all of the dialogs, then the +Main Window widget with popup-menu hierarchy, and finally the View widget. +

However, we are not ready to begin just yet. The migration process can +be long, but it does not have to be difficult. The Open, Save As, Page Delete and IO Error dialogs use Motif XmFileSelectionBox and XmMessageBox dialogs. Qt provides similar +functionality with QFileDialog and QMessageBox, which we can begin +using immediately. +

The Print dialog is special, however. The Print dialog cannot be +replaced until after we have replaced the View widget. Qt provides +a complete printing mechanism with QPrinter, but we cannot start using +it until we have replaced the View widget. +

Removing the Help Dialog +

The Help dialog is also special. Instead of replacing the Help +dialog with a custom QDialog, we will use the Qt +Help System classes to provide a more advanced online help. +However, we cannot start using classes like QToolTip and QWhatsThis +until we replace the Main Window and View widgets. +

The help text included with the original project is very small and +only contains information about the XmNoteBook widget. The use of +tooltips and whats-this text will suffice for this example. If your +migration project has a large online help system, we recommend looking +at the Simple HTML Help Browser +example for information on how to build an rich text help system with +hypertext navigation and full printing capabilities, or using Qt Assistant. +

Removing the existing Help dialog is relatively simple. We remove +the Xmd/Help.h, Xmd/HelpP.h and Xmd/Help.c files from our +project file and regenerate our Makefile. +

The code to create the Help menu and Help dialog is in todo.cpp. We remove the Xmd/Help.h include, the *help_manager +resource string, the help_cb() function forward declaration and the +help_widget global variable. We also need to remove the code that +creates the Help dialog. We will also remove the code to create +the Help menu, since this menu is now empty. Finally, we remove +the help_cb() function implementation. +

The Help dialog is now removed from our project. We cannot add +QToolTip and QWhatsThis help at the moment, since we are still using +XmMainWindow for the Main Window widget. Once we have +migrated the Main Window and the popup-menu hierarchy, we can +begin using QToolTip and QWhatsThis for online help. +

[ Previous: Getting Started ] +[ Home ] +[ Next: Using Qt Standard Dialogs ] +

+ +

Trademarks +

Qt 3.3.8

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