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Borland Windows Custom Controls _________________________________________ ObjectWindows for C++ Borland Windows Custom Controls The Borland Windows Custom Controls (BWCC) is a collection of stylish custom controls that implement the look and feel of Borland-style Windows dialog boxes, such as the dialog boxes in Resource Workshop and Turbo Pascal for Windows. ================================================================= BWCC custom controls ================================================================= o Bitmapped push buttons These controls use bitmaps to implement the behavior of standard windows push buttons. They also implement two enhancements over Windows standard buttons. o Static bitmaps These controls implement a "non-pushable" bitmap style for displaying "splash" images. o Radio buttons These radio buttons implement the behavior of standard Windows radio buttons and auto-radio buttons but are in a more attractive style than standard Windows radio buttons. o Check boxes These check boxes implement the behavior of standard Windows check boxes and auto-check boxes but are in a more attractive style than standard Windows check boxes. Page 1 o Group boxes These controls provide areas that appear to be cut into the "chiseled steel" background. Other controls can be placed on these areas. Gray panels themselves are "static" controls, meaning that the user does not interact with them at run time. o Dips and bumps These thin lines act as vertical and horizontal dividers within a dialog. - Dips (derivation: speed dip) separate areas within a dialog. (Borland uses them to separate push buttons from the rest of the dialog's controls.) - Bumps (derivation: speed bump) separate areas within a group box. o Custom dialog class The Borland custom dialog class does two things: - It paints the dialog window background with a brush appropriate to the display device--speckled (chiseled steel) for monitors with VGA capabilities and higher, white for EGA and monochrome. - It optimizes dialog drawing by taking over from the custom controls and drawing them directly on the surface of the dialog window. This "turbo painting" allows Borland's dialogs to implement a sophisticated look without a sluggish feel. ================================================================= Using BWCC or Custom Buttons in a program ================================================================= Using BWCC in an ObjectWindows program is easy. 1. In your C++ source files use the ObjectWindows BWCC "TB" classes (presented later) in place of their plain "T" analogs. Be sure to include the requisite BWCC header files. 2. In resource files, edit dialog entries to specify Windows class "BORDLG". 3. To ensure that BWCC.DLL will be dynamically loaded along with your program, include a call to BWCCGetVersion (defined in INCLUDE\BWCC.H) somwhere in your application. By Page 2 convention, the call to BWCCGetVersion is in your application class's InitMainWindow member function. 4. Link your program with the import library LIB\BWCC.LIB. You must link BWCC.LIB with your program before you link IMPORT.LIB. 5. Make the dynamic link library BWCC.DLL available to your application to use at run time (in addition to OWL31.DLL). For Windows to find it, it must be in one of the following places: o The same directory as your application's .EXE file o The Windows startup directory o The Windows system directory o A directory on your PATH ================================================================= Using Borland dialogs ================================================================= Borland dialogs must have their resource's Windows class set to "BORDLG". Such a dialog may be referred to by a conventional ObjectWindows TDialog class. Note that there is no TBDialog class. ================================================================= TBButton BBUTTON.H ================================================================= Derived from TButton. TBButton is an interface class that represents a BWCC bitmap push button interface element. You must use a TBButton to create a button control in a parent TWindow. You can also use a TBButton to facilitate communication between your application and the button controls of a TDialog. There are two types of push buttons. A regular button appears with a thin border. A default button appears with a thick border and represents the default action of the window (if user presses Enter). There can only be one default push button in a window. Page 3 TBButton Member functions constructor TBButton(PTWindowsObject AParent, int AnId, LPSTR AText, int X, int Y, int W, int H, BOOL IsDefault, PTModule AModule = NULL); Constructs a button object with the supplied parent window (AParent), control ID (AnId), associated text (AText), position (X, Y) relative to the origin of the parent window's client area, width (W), and height (H). Invokes TButton's constructor with similar parameters. Adds BS_DEFPUSHBUTTON to the default styles set for the TBButton (in Attr.Style), if IsDefault is TRUE. Otherwise, it adds BS_PUSHBUTTON. See also: TButton::TButton constructor TBButton(PTWindowsObject AParent, int ResourceId, PTModule AModule = NULL); Constructs a TBButton object to be associated with a button control of a TDialog. Invokes the TButton constructor with identical parameters; the TButton constructor calls DisableTransfer to exclude the button from the transfer mechanism because they have no data to be transferred. The ResourceId parameter must correspond to a button resource that you define. See also: TButton::TButton, TWindowsObject::DisableTransfer constructor TBButton(StreamableInit); protected TBButton stream constructor. Invokes TButton's stream constructor. Called when a TBButton is instantiated using data from an input stream. See also: TButton::TButton build static PTStreamable build(); Invokes the TBButton(StreamableInit) constructor. Constructs an object of the type TBButton prior to reading in its data members from a stream. Page 4 TBButton GetClassName virtual LPSTR GetClassName(); protected Returns the name of TBButton's Windows registration class, "BORBTN". See also: TWindowsObject::GetWindowClass ================================================================= TBCheckBox BCHKBOX.H ================================================================= Derived from TCheckBox. TBCheckBox is an interface object that represents a BWCC check box interface element in Windows. You must use a TBCheckBox to create a BWCC check box control in a parent TWindow. You can use a TBCheckBox to facilitate communication between your application and the check box controls of a TDialog. Check boxes have two states: checked and unchecked. Three-state check boxes have an additional grayed state. TBCheckBox member functions are concerned primarily with managing the check box's state. Optionally, a check box can be part of a group (TGroupBox) that visually and functionally groups its controls. Member functions TBCheckBox(PTWindowsObject AParent, int AnId, LPSTR ATitle, int X, int Y, int W, int H, PTGroupBox AGroup, PTModule AModule = NULL); Constructs a check box object with the specified parent window (AParent), control ID (AnId), associated text (ATitle), position (X, Y) relative to the origin of the parent window's client area, width (W), height (H), and associated group box (AGroup). TBCheckBox::TBCheckBox invokes a TCheckbox constructor which sets the check box's Attr.Style data member to WS_CHILD | WS_VISIBLE | WS_TABSTOP | BS_AUTOCHECKBOX. See also: TCheckBox::TCheckBox constructor TBCheckBox(PTWindowsObject AParent, int ResourceId, PTGroupBox AGroup, PTModule AModule = NULL); Page 5 TBCheckBox Constructs a TBCheckBox object to be associated with a check box control of a TDialog. ResourceId must correspond to a check box resource in the resource file. Invokes a TCheckBox constructor which sets Group to AGroup, and enables the data transfer mechanism by calling EnableTransfer. See also: TCheckBox::TCheckBox, TWindowsObject::EnableTransfer constructor TBCheckBox(StreamableInit); protected TBCheckBox stream constructor. Invokes TCheckBox's stream constructor. Called when a TBCheckBox is instantiated using data from an input stream. See also: TCheckBox::TCheckBox build static PTStreamable build(); Invokes the TBCheckBox(StreamableInit) constructor. Constructs an object of the type TBCheckBox prior to reading in its data members from a stream. GetClassName protected virtual LPSTR GetClassName(); Returns the name of TBCheckBox's Windows registration class, "BORCHECK". ================================================================= TBDivider BDIVIDER.H ================================================================= Derived from TControl. A TBDivider is an interface object that represents a static BWCC divider. Dividers come in two flavors: dips and bumps. Dips separate areas within a dialog. Bumps separate areas within a group box. Page 6 TBDivider Member functions TBDivider(PTWindowsObject AParent, int AnId, LPSTR AText, int X, int Y, int W, int H, BOOL IsVertical, BOOL IsBump, PTModule AModule = NULL); Constructs a static control object with the supplied parent window (AParent), control ID (AnId), text (ATitle), position (X, Y) relative to the origin of the parent window's client area, width (W) and height (H). By default, the static control is visible upon creation. Adds one of BSS_VBUMP, BSS_VDIP, BSS_HBUMP, or BSS_HDIP to Attr.Style depending on the values of IsVertical and IsBump. Invokes a TControl constructor which sets Attr.Style to WS_CHILD | WS_VISIBLE | WS_GROUP | WS_TABSTOP. See also: TControl::TControl constructor TBDivider(PTWindowsObject AParent, int ResourceId, PTModule AModule = NULL); Constructs a TBDivider object to be associated with a static control interface control of a TDialog. Invokes the TControl constructor with similar parameters. Disables the data transfer mechanism by calling DisableTransfer. The ResourceId parameter must correspond to a static control resource that you define. See also: TControl::TControl constructor TBDivider(StreamableInit); protected TBDivider stream constructor. Invokes TControl's stream constructor. Called when a TBDivider is instantiated using data from an input stream. See also: TControl::TControl build static PTStreamable build(); Invokes the TBDivider(StreamableInit) constructor. Constructs an object of the type TBDivider prior to reading in its data members from a stream. Page 7 TBDivider GetClassName virtual LPSTR GetClassName(); protected Returns the name of TBDivider's Windows registration class, "BORSHADE". ================================================================= TBGroupBox BGRPBOX.H ================================================================= Derived from TGroupBox. An instance of a TBGroupBox is an interface object that represents a corresponding gray BWCC group box element. Group boxes don't serve an active purpose onscreen. They visually unify a group of selection boxes (check boxes and radio buttons) or other controls. Behind the scenes they can take an important role in handling state changes for their group of controls (normally check boxes or radio buttons). For example, you may want to respond to a selection change in any one of a group of radio buttons in a similiar manner. You can do this by deriving a class from TBGroupBox that redefines the member function SelectionChanged. Alternatively, you could respond to selection changes in the group of radio buttons by defining a response for the group box's parent. To do so, define a child-ID-based response member function, using the ID of the group box. The group box will automatically send a child-ID-based message to its parent whenever the radio button selection state changes. Member functions TBGroupBox(PTWindowsObject AParent, int AnId, LPSTR AText, int X, int Y, int W, int H, PTModule AModule = NULL); Constructs a group box object with the supplied parent window (AParent), control ID (AnId), associated text (AText), position (X, Y) relative to the origin of the parent window's client area, width (W), and height (H). Invokes the TGroupBox constructor with similar parameters, which modifies Attr.Style by removing WS_TABSTOP. The TBGroupBox constructor then removes BS_GROUPBOX and adds BSS_GROUP to Attr.Style. NotifyParent is set to TRUE in the TGroupBox constructor; by default, the group box's parent Page 8 TBGroupBox will be notified when a selection change occurs in any of the group box's controls. See also: TGroupBox::TGroupBox constructor TBGroupBox(PTWindowsObject AParent, int ResourceId, PTModule AModule = NULL); Constructs a TBGroupBox object to be associated with a group box control of a TDialog. Invokes the TGroupBox constructor with identical parameters, which calls DisableTransfer to exclude group boxes from the transfer mechanism because they have no data to be transferred. The ResourceId parameter must correspond to a group box resource that you define. See also: TGroupBox::TGroupBox, TWindowsObject::DisableTransfer constructor TBGroupBox(StreamableInit); protected TBGroupBox stream constructor. Invokes TGroupBox's stream constructor. Called when a TBGroupBox is instantiated using data from an input stream. See also: TGroupBox::TGroupBox build static PTStreamable build(); Invokes the TBGroupBox(StreamableInit) constructor. Constructs an object of the type TBGroupBox prior to reading in its data members from a stream. GetClassName virtual LPSTR GetClassName(); protected Returns the name of TBGroupBox's Windows registration class, "BORSHADE". Page 9 TBRadioButton ================================================================= TBRadioButton BRADIO.H ================================================================= Derived from TRadioButton. A TBRadioButton is an interface object that represents an attractive BWCC radio button element. Use TBRadioButton to create a radio button control in a parent TWindow. A TBRadioButton can also be used to communicate between your application and the radio button controls of a TDialog. Radio buttons have two states: checked and unchecked. Optionally, a radio button can be part of a group (TGroupBox) that visually and logically groups its controls. Member functions TBRadioButton(PTWindowsObject AParent, int AnId, LPSTR ATitle, int X, int Y, int W, int H, PTGroupBox AGroup, PTModule AModule = NULL); Constructs a radio button object with the supplied parent window (AParent), control ID (AnId), associated text (ATitle), position (X, Y) relative to the origin of the parent window's client area, width (W), height (H), and associated group box (AGroup). Invokes the TRadioButton constructor with similar parameters, which sets the Attr.Style data member to WS_CHILD | WS_VISIBLE | BS_AUTORADIOBUTTON. See also: TRadioButton::TRadioButton constructor TBRadioButton(PTWindowsObject AParent, int ResourceId, PTGroupBox AGroup, PTModule AModule = NULL); Constructs a TBRadioButton object to be associated with a radio button control of a TDialog. Invokes the TRadioButton constructor with identical parameters. The ResourceId parameter must correspond to a radio button resource that you define. constructor TBRadioButton(StreamableInit); protected TBRadioButton stream constructor. Invokes TRadioButton's stream constructor. Called when a TBRadioButton is instantiated using data from an input stream. See also: TRadioButton::TRadioButton Page 10 TBRadioButton build static PTStreamable build(); Invokes the TBRadioButton(StreamableInit) constructor. Constructs an object of the type TBRadioButton prior to reading in its data members from a stream. GetClassName virtual LPSTR GetClassName(); protected Returns the name of TBRadioButton's Windows registration class, "BORRADIO". ================================================================= TBStatic BSTATIC.H ================================================================= Derived from TStatic. A TBStatic is an interface object that represents a static text interface element in Windows. A TBStatic must be used to create a static control in a parent TWindow. A TBStatic can also be used to facilitate modifications to the text of static controls in TDialogs. Member functions TBStatic(PTWindowsObject AParent, int AnId, LPSTR ATitle, int X, int Y, int W, int H, WORD ATextLen, PTModule AModule = NULL); Constructs a static control object with the supplied parent window (AParent), control ID (AnId), text (ATitle), position (X, Y) relative to the origin of the parent window's client area, width (W), height (H), and text length(ATextLen). By default, the static control is visible upon creation and has left-justified text. (Attr.Style is set to WS_CHILD | WS_VISIBLE | WS_GROUP | SS_LEFT.) Invokes a TStatic constructor. See also: TStatic::TStatic constructor TBStatic(PTWindowsObject AParent, int ResourceId, WORD ATextLen, PTModule AModule = NULL); Page 11 TBStatic Constructs a TBStatic object to be associated with a static control interface control of a TDialog. Invokes the TStatic constructor with similar parameters, which sets TextLen to ATextLen. Disables the data transfer mechanism by calling DisableTransfer. The ResourceId parameter must correspond to a static control resource that you define. See also: TStatic::TStatic constructor TBStatic(StreamableInit); protected TBStatic stream constructor. Invokes TStatic's stream constructor. Called when a TBStatic is instantiated using data from an input stream. See also: TStatic::TStatic build static PTStreamable build(); Invokes the TBStatic(StreamableInit) constructor. Constructs an object of the type TBStatic prior to reading in its data members from a stream. GetClassName virtual LPSTR GetClassName(); protected Returns the name of TBStatic's Windows registration class, "BORSTATIC". ================================================================= TBStaticBmp BSTATBMP.H ================================================================= Derived from TControl. A TBStaticBmp is an interface object that represents a static BWCC bitmap interface element used for displaying splash images. A TBStaticBmp must be used to create a bitmap control in a parent TWindow. A TBStaticBmp can also be used to facilitate modifications to the text of bitmap controls in TDialogs. Page 12 TBStaticBmp Member functions TBStaticBmp(PTWindowsObject AParent, int AnId, LPSTR AText, int X, int Y, int W, int H, PTModule AModule = NULL); Constructs a static bitmap object with the supplied parent window (AParent), control ID (AnId), text (ATitle), position (X, Y) relative to the origin of the parent window's client area, width (W), and height (H). By default, the static control is visible upon creation. Invokes a TControl constructor. See also: TControl::TControl constructor TBStaticBmp(PTWindowsObject AParent, int ResourceId, PTModule AModule = NULL); Constructs a TBStaticBmp object to be associated with a static bitmap interface control of a TDialog. Invokes the TControl constructor with similar parameters. Disables the data transfer mechanism by calling DisableTransfer. The ResourceId parameter must correspond to a static control resource that you define. See also: TControl::TControl, TWindowsObject::DisableTransfer constructor TBStaticBmp(StreamableInit); protected TBStaticBmp stream constructor. Invokes TControl's stream constructor. Called when a TBStaticBmp is instantiated using data from an input stream. See also: TControl::TControl build static PTStreamable build(); Invokes the TBStaticBmp(StreamableInit) constructor. Constructs an object of the type TBStaticBmp prior to reading in its data members from a stream. GetClassName virtual LPSTR GetClassName(); protected Page 13 TBWindow Returns the name of TBStaticBmp's Windows registration class, "BORBTN". ================================================================= TBWindow BWINDOW.H ================================================================= TBWindow is derived from TWindow. TBWindow is a generic window with a light gray background that will look attractive with BWCC. Member functions TBWindow(PTBWindowsObject AParent, LPSTR ATitle, PTModule AModule = NULL); Constructs a gray-background window object with the parent window supplied in AParent. (AParent should be NULL for main windows, which have no parent.) The associated text, usually the window's caption, is copied from ATitle. See also: TWindow::TWindow constructor TBWindow(StreamableInit); protected TBWindow stream constructor. Called when a TBWindow is instantiated using data from an input stream. See also: TWindow::TWindow build static PTStreamable build(); Invokes the TBWindow(StreamableInit) constructor. Constructs an object of the type TBWindow prior to reading in its data members from a stream. See also: TBWindow::TBWindow GetClassName virtual LPSTR GetClassName(); protected Returns "TBWindow", the name of the default Windows registration class for a TBWindow. Page 14 TBWindow GetWindowClass virtual void GetWindowClass(WNDCLASS & AWndClass); Fills the WNDCLASS structure, supplied in AWndClass, with the default registration attributes appropriate for a TBWindow. These attributes are the same as those for a TWindow except that the background color is set to LTGRAY_BRUSH. See also: TBWindow::GetClassName, TWindow::GetWindowClass, TWindowsObject::Register, TBWindow::Create Page 15