Tài liệu Programming the Be Operating System-Chapter 2: BeIDE Projects docx

... to determine the item’s current label before changing it to a new string. The type of label-changing shown in the above snippet is a good candidate for the use of both Label() 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 selec...

Ngày tải lên: 26/01/2014, 07:20

... existing BeIDE example projects and as you then start to write your own BeOS program. The BeIDE Folders When the BeIDE is installed on your hard drive, the folders and files that make up this programming ... Source Code 2 2. BeIDE Projects The BeOS CD-ROM includes the BeIDE Be s integrated development environ- ment (IDE) that’s used for creating Be applications. Thi...

Ngày tải lên: 26/01/2014, 07:20

... will be rectified in the balance of this book. 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 ... version would be executed and the window would close—but the 1 Chapter 1 In this chapter: • Features of the BeOS • Structure of the BeOS • Software Kits and...

Ngày tải lên: 26/01/2014, 07:20

... data members in Be classes. If a Be class does define 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 MyHelloWorld project the version just described. The Alert folder also holds a version of the MyHelloWorld project. The only difference between the two projec...

Ngày tải lên: 26/01/2014, 07:20

... altered—as they are here with the writing of the string “Quitting ” the view needs to be updated before 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 a...

Ngày tải lên: 26/01/2014, 07:20

... 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 is either red or blue. Because the pixels alternate between these two colors, and because pixel density is high on...

Ngày tải lên: 26/01/2014, 07:20

... *buttonBeep1Name = "Beep1"; const char *buttonBeep2Name = "Beep2"; const char *buttonBeep1Label = "Beep One"; const char *buttonBeep2Label = "Beep Two"; In the ... will be a quick read in the BPictureButton section of the Interface Kit chapter of the Be Book. Figure 6-5. The Find window of the BeIDE provides an example of a picture but...

Ngày tải lên: 26/01/2014, 07:20

... 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’ve added them to make it clear that the coordinates of the textBounds rectangle are relative to the viewFrame rec...

Ngày tải lên: 26/01/2014, 07:20

... message and the target of the message don’t have to be one and the same, they can be as shown in this snippet (read the Application-Defined Messages 357 identical to the version used in the Chapter ... calls the BLooper function DispatchMessage() for the next message in the queue. When your posted message becomes the next in the queue, the looper invokes DispatchMes...

Ngày tải lên: 17/10/2013, 19:15

... node (data). The entry can be represented by an entry_ref or a BEntry object. Currently the entry is in the form of an entry_ref. Here the entry is stored in a BEntry object. The BEntry function ... /boot/myDir/). The BEntry func- tion GetPath() is used to store the BEntry information as a BPath object. Here the BPath object path is first set to the directory, then the f...

Ngày tải lên: 20/10/2013, 10:15