Several bugs in precedences graph

[Jerome Legrand]

There are several bugs in precedences graph dialog box :

Bug 1

Precedences graph dialog box crash if one follow the following step :

• Open precedences graph.
• Choose "create" in combo box and task or buffer.
• Click dialog box canvas (possibly more than once).

=> crash

Bug 2

Precedences graph dialog box has a wrong behavior if one follow the following step :

• Open precedences graph.
• Choose "create" in combo box and message.
• Click dialog box canvas and create a message (new and Ok in the new item dialog box + message creation).

=> the newly created message appears and disappears (it is actualy created)

Bug 3

Precedences graph dialog box shows a strange behavior if one follow the following step :

• Create a processor and an address space
• Open precedences graph.
• Choose "create" in combo box and task.
• Click dialog box canvas and choose Ok in the new item dialog box
• In Add/Update? task dialog box click on "Close" button.

=> no task is created (Ok) but the circle which is task graphical equivalent in precedences graph is and stay on th canvas.

Bug 4

Idem bug 3 with buffer instead of task => crash in fourth step when "Ok" button is clicked in "new item" dialog box.