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Programming the Be Operating System-Chapter 9: Messages and Threads

Programming the Be Operating System-Chapter 9: Messages and Threads

Hệ điều hành

... going to reply to the message (moretypically the target handler simply handles the message and doesn’t return anytype of reply). While the poster of the message and the target of the message don’thave ... thisexample the BWindow object is both the looper and handler. The menu item–generated message is placed in the window’s message loop, and the windowobject sends the message to itself and invokes the ... parame-ter, handler, names the target handler the BHandler object to which the mes-sage is to be delivered. The replyHandler, which is initialized to NULL,isofinterest only if the target handler...
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Tài liệu Programming the Be Operating System-Chapter 4: Windows, Views, and Messages doc

Tài liệu Programming the Be Operating System-Chapter 4: Windows, Views, and Messages doc

Hệ điều hành

... was clicked. The values of the point are in the view’s coor-dinate system. For example, if the cursor was over the very top left corner of the view at the time of the mouse click, the point’s ... Show();} The coordinate systems for the window and the view are different. The window’ssize and screen placement, which are established by the BRect variable framethat is passed to the constructor, ... Views, and Messages50.0). If the point (100.1, 49.9) is used instead, the result is the same the win-dow’s corner ends up 100 pixels from the left and 50 pixels from the top of the screen.The...
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Tài liệu Programming the Be Operating System-Chapter 6: Controls and Messages ppt

Tài liệu Programming the Be Operating System-Chapter 6: Controls and Messages ppt

Hệ điều hành

... class MyDrawView and occupies the entire con-tent area of a MyHelloWindow. In the MyHelloWindow constructor, the view iscreated first, and then the buttons are created and added to the view:MyHelloWindow::MyHelloWindow(BRect ... the user the current state of the button. To see a good real-world use of a two-state picture button, run the BeIDE. Then choose Find from the Edit menu. In the lower-left area of the Find window ... on it, as for a button), the system passes the applica-tion-defined message to the window. How the window handles the message isdetermined by the code you include in the BWindow member functionMessageReceived().Control...
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Analysis of Phosphorus Behavior in the Giant Reed for Phytoremediation and the Biomass Production System

Analysis of Phosphorus Behavior in the Giant Reed for Phytoremediation and the Biomass Production System

Môi trường

... plants including the roots and rhizomes are cropped except for the roots and rhizomes remaining for the next year. Thereafter, the giant reeds grow with the rhizome extension, and the giant reed ... from the fluorescent lamp to the top of the giant reeds was about 0.2 m at the start of the experiment. The temperature in the experimental room was kept at about 28 °C. The rhizomes and the ... in the typical giant reed habitat. The size of rhizomes and the number of stems growing from rhizomes are also different between this study and the natural environment. This means that the...
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Visual Studio 2005 and the Microsoft Office System

Visual Studio 2005 and the Microsoft Office System

Kỹ thuật lập trình

... and the number of columns to 2.5. Click the OK button to insert the new table.6. Select the upper two cells in the left-hand column. Then right-click the cells and selectMerge Cells from the ... In the toolbox, expand the Standard control section and drag a HyperLink control from the toolbox onto the designer surface.6. Select the HyperLink control on the designer surface to display the ... Name the new web user control TextPart.ascx and click the Add button.4. In the Solution Explorer, select the TextPart.ascx file and click the View Designerbutton.5. In the toolbox, expand the...
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Programming the Be Operating System-Chapter 10: Files

Programming the Be Operating System-Chapter 10: Files

Hệ điều hành

... the upcoming file saving and opening changes. While looking over the old code, I’ll insert a few changeshere and there to ready the program for the file-handling code. The changes beginin the ... For the Save file panel, the display of the panel comes when the userchooses the Save As item from the File menu. In response to the message issuedby the system to the appropriate MessageReceived() ... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Openfile panel, a click on the Save button in the Save file panel, or a click on the Can-cel...
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Tài liệu Module 1: Introduction to Exchange 2000 and the Web Storage System pdf

Tài liệu Module 1: Introduction to Exchange 2000 and the Web Storage System pdf

Chứng chỉ quốc tế

... Objective To list the database features of the Web Storage System Lead-in Each Exchange store is a Web Storage System and uses the Web Storage System to access items in the store. Note ... connecting to the server with access to public folders or mailboxes. Use Exchange System Manager to create the virtual directory and to specify the access control and authentication methods for the ... computer. If the user sorts or queries the data, the operation is performed locally on the client; thereby increasing the process time experienced by the user—without affecting network performance....
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Tài liệu Address Conversion Functions and The Domain Name System docx

Tài liệu Address Conversion Functions and The Domain Name System docx

Quản trị mạng

... seconds) ãLength of resource data ãResource data Netprog: DNS and name lookups3 The Domain Name System ã The domain name system is usually used to translate a host name into an IP address ... link with the DNS resolver library:-lnsl (nsl is “Name Server Library”)Suns (Solaris) need this! Netprog: DNS and name lookups35 Network Byte OrderãAll the IP addresses returned via the hostent ... where to find the address for a hostname, ask the root server.ã The root server will tell you what nameserver to contact.ãA request may get forwarded a few times. Netprog: DNS and name...
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Tài liệu Address Conversion Functions and The Domain Name System Refs doc

Tài liệu Address Conversion Functions and The Domain Name System Refs doc

Quản trị mạng

... ! Netprog: DNS and name lookups 6Domain Nameã The domain name for a host is the sequence of labels that lead from the host (leaf node in the naming tree) to the top of the worldwide naming ... Host Information HINFO Netprog: DNS and name lookups 13DNS Serversã Servers handle requests for their domain directly.ã Servers handle requests for other domains by contacting remote DNS ... INFORMATION Netprog: DNS and name lookups 4DNS Hierarchyedu com org jprpi albany Netprog: DNS and name lookups 1Address Conversion Functions and The Domain Name System Refs: Chapter 9RFC...
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Tài liệu Programming the Be Operating System-Chapter 1: BeOS Programming Overview ppt

Tài liệu Programming the Be Operating System-Chapter 1: BeOS Programming Overview ppt

Hệ điều hành

... handle such tasks. The zoom-ing and moving of windows is handled by the system, not by the SimpleApp code.This simple demonstration emphasizes the power of the BeOS system software—itis the ... windows tab)ã The type of the window (the look and feel of the window)ã The behavior of the window (whether it has a resize knob, and so forth)Recall from your C++ background that when the definition ... click in the window) is taken care of by the operating system. You’llbe even more pleased to find that for some system messages, even the window’sresponse to the message is handled by the BeOS....
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Tài liệu Programming the Be Operating System-Chapter 2: BeIDE Projects docx

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

Hệ điều hành

... name to change in the Find box and the name to replace it with in the Replace box of the Find window.5. Click on the Find button in the Find window.6. After verifying that the found text should ... from the BeIDE main menu in the dock and open a header file.2. Choose Find from the Search menu of the opened header file.3. Set up the Find window to search the project’s source code files and ... header file and source code file with the same name as the project (and thus the same name as the application that will be built from the project). The header file holds the definition of the class...
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Tài liệu Programming the Be Operating System-Chapter 3: BeOS API Overview doc

Tài liệu Programming the Be Operating System-Chapter 3: BeOS API Overview doc

Hệ điều hành

... the control of input and output devices and for the development of device drivers.These classes serve as interfaces to the ports on the back of a computer running the BeOS. Network Kit The Network ... Descriptions and the Be Book The definitive source of information for the many classes that make up the BeOSsoftware kits is the Be class reference by the programmers of the BeOS. The elec-tronic ... illustrates the relationship between the BApplication and BLooper and BHandler classes.Interface KitWith over two dozen classes, the Interface Kit is the largest of the Be software kits.It’s also the...
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Tài liệu Programming the Be Operating System-Chapter 5: Drawing ppt

Tài liệu Programming the Be Operating System-Chapter 5: Drawing ppt

Hệ điều hành

... done in the Draw() function, wherea call to MovePenTo() ensures that the drawing will start in the top left corner of the view (and, because the view is the same size as the window, the top ... MouseDown() makes the system aware of the fact that the viewneeds updating, and the system invokes Draw():void MyDrawView::MouseDown(BPoint point){ Invalidate();}One further improvement to the ColorControl ... at the time of declaration. The order of the supplied values corresponds to the ordering of the struct defini-tion. The following declares an rgb_color variable named redColor and assignsthe...
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Tài liệu Programming the Be Operating System-Chapter 7: Menus docx

Tài liệu Programming the Be Operating System-Chapter 7: Menus docx

Hệ điều hành

... item—Command-1 for the Beep Once item and Command-2for the Beep Twice item. Figure 7-10 shows that the system has assigned each itema trigger that is the same character as that used in the item’s ... that, gain access to the menu item and then invoke the BMenuItem function SetLabel(). In the next 264 Chapter 7: Menus The last BPopUpMenu parameter defines the layout of the pop-up menu. Bydefault, ... “Drawing:” and a menu with the name“Visual.” Recall that the source of the menu’s name is the name parameter of the BPopUpMenu object. The BMenuField name parameter serves as a name for the BMenuField...
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Tài liệu Programming the Be Operating System-Chapter 8: Text ppt

Tài liệu Programming the Be Operating System-Chapter 8: Text ppt

Hệ điều hành

... When the contents of the view a scrollbar isattached to exceed the size of the view, the scrollbar’s knob appears and the scrollbar becomes enabled. As the content of the view increases, the ... desiredchanges to the font and then pass these changes back to the text view object. The same applies to the text’s color. The BTextView function SetFontAndColor()takes care of both of these tasks:void ... slant to the right. The following code generates the three strings shown in Figure 8-3:BFont theFont(be_plain_font);theFont.SetSize(24.0);theFont.SetShear(45.0);theView->SetFont(&theFont);theView->MovePenTo(110.0,...
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