Programming the Be Operating System-Chapter 10: Files
Programming the Be Operating System-Chapter 10: Files
... application data member. The Save file panel, on the other hand, affects the window, and is referenced by a window data member. So I want the message sent to the window object rather than the application ... under the menubar, there’s no need to resize the frame such that it fills the window, less the menubar area. The MyHelloWindow constructor next establishes the size of the text view and the text ... with files regardless of the program being used. The BeOS is no exception. In Figure 10-1, you see the standard Save file panel. The Open file panel looks similar to the Save file panel, with the...
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Programming the Be Operating System-Chapter 9: Messages and Threads
... class The previous section described the system’s application roster, the be_ roster glo- bal object used to access the roster, and the BRoster class that defines the type of object be_ roster is. The ... the BLooper function DispatchMessage() for the next message in the queue. When your posted message becomes the next in the queue, the looper invokes DispatchMessage() to pass the message to the ... executing instances of the RosterCheck program (including the instance that’s just been launched and is executing the above code). The following code limits the number of times the user can execute...
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Tài liệu Programming the Be Operating System-Chapter 1: BeOS Programming Overview ppt
... will be rectified in the balance of thisbook. Starting, in fact, with the next chapter.BeOS Programming Environment The programming tool you’ll be using to create your Be applications is the BeIDE.This ... during the execution of a program. Anobject can be added or deleted from the heap without regard for itsplacement in the heap, or for the other contents of the heap. The stack, on the other hand, ... version would be executed and the window would close—but the 1Chapter 1In this chapter:• Features of the BeOS• Structure of the BeOS• Software Kits andTheir Classes• BeOS Programming Fundamentals•...
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Tài liệu Programming the Be Operating System-Chapter 2: BeIDE Projects docx
... determined by the status of the Argv Only checkbox. Whilethese two items appear grouped together in the Application Flags area, they aren’trelated. Neither, either, or both can be checked at the same ... resource filenames from the project window.6. Edit the name of the constants in the #ifndef directive in the header files and the #includes in the source files. 7. Test the project’s code by building ... will be beneficial as you look at existing BeIDE example projects and as you then start towrite your own BeOS program. The BeIDE FoldersWhen the BeIDE is installed on your hard drive, the folders...
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Tài liệu Programming the Be Operating System-Chapter 3: BeOS API Overview doc
... data members in Be classes. If a Be class doesdefine data members, they are usually defined to be private rather than public.These private data members will be used within class member functions, ... version of the MyHelloWorldproject the version just described. The Alert folder also holds a version of the MyHelloWorld project. The only difference between the two projects appears in the MyHelloApplication ... important member functions. The focus of this book is on the first three kits described below: the ApplicationKit, the Interface Kit, and the Storage Kit. Don’t feel as if you’re being short-changed,...
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Tài liệu Programming the Be Operating System-Chapter 4: Windows, Views, and Messages doc
... altered—as they arehere with the writing of the string “Quitting ” the view needs to be updatedbefore the changes become visible onscreen. If the changes are made while the view’s window is hidden, then ... AddChild(fMyView); BFont theFont = be_ plain_font; int32 theSize = 12; SetHelloViewFont(theFont, theSize); Show();} The call to SetHelloViewFont() results in the about-to -be shown window hav-ing ... chapter. The beep() global function plays the system beep. Sound (and thus the beep() function) is a topic covered in the Media Kit chapter of the Be Book.View HierarchyA window can hold any number...
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Tài liệu Programming the Be Operating System-Chapter 5: Drawing ppt
... 10.0); The call to MovePenTo() moves the pen to the location 30 pixels from the left of the view and 40 pixels from the top of the view. That places the pen at the point(30.0, 40.0). The call ... of the pixels in the rectangle are purple. Instead, each iseither red or blue. Because the pixels alternate between these two colors, andbecause pixel density is high on a typical monitor, the ... be different is the content of the Draw() function. The code that demonstrates the concepts of each drawing topic can usually be added to the Draw() routine.In Be programming, the colors and...
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Tài liệu Programming the Be Operating System-Chapter 6: Controls and Messages ppt
... *buttonBeep1Name = "Beep1";const char *buttonBeep2Name = "Beep2";const char *buttonBeep1Label = "Beep One";const char *buttonBeep2Label = "Beep Two";In the ... immediately change the setting. Instead,when the user dismisses the window the checkbox resides in, the value of the checkbox can be queried and the setting of the program feature could be per-formed ... *radioBeep2Name = "Beep2Radio";const char *radioBeep3Name = "Beep3Radio";const char *radioBeep1Label = "One Beep";const char *radioBeep2Label = "Two Beeps";const...
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Tài liệu Programming the Be Operating System-Chapter 7: Menus docx
... todetermine the item’s current label before changing it to a new string. The type oflabel-changing shown in the above snippet is a good candidate for the use of bothLabel() and SetLabel(). If the user ... BUTTON_BEEP_MSG: beep(); break; case MENU_BEEP_1_MSG: beep(); break; default: BWindow::MessageReceived(message); }}Because a click on the Beep One button and a selection of the Beep Once ... all ofthese items need to be shifted within the window, it would make sense to haveall of the items attached to a view within the window rather than to the win-dow itself. Then a call to the...
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Tài liệu Programming the Be Operating System-Chapter 8: Text ppt
... that the first parameter to the BMenuItem constructor,label, specifies the new menu item’s label the text the user sees in the menu. The second parameter, message, associates a message with the ... example. The arrows would not be in the window either—I’veadded them to make it clear that the coordinates of the textBounds rectangle arerelative to the viewFrame rectangle. Here’s the code ... relationshipbetween the two rectangles clear.Another point to be aware of is that the top and bottom coordinates of the textarea rectangle become unimportant as the user enters text that exceeds the...
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