.
To see more of Yury’s work, be sure to visit his
home page.
Environment: Windows 9x and Windows NT, Visual C++ 6
Introduction
In this article I want to introduce two template
classes, that can help you in simple dialog development.
Very frequently we try to set different color or font to static,
editbox or another control in our dialog. To simplify this work
I wrote two classes CColorCtrl
and
CFontCtrl
.
These classes have two advantages. First of all, you don’t need to
throw out your beloved class. Because these classes are templates – they can
be attached to any existing CWnd-based class.
Second, there is no painting of any kind in these classes.
Control works in one of two modes:
- Simple Colored Mode
- Blinking Mode
You can customise:
- Text color(s)
- Background color(s)
- Blinking delay
If your control uses WM_CTLCOLOR
message for painting
(as almost all standard windows controls do), you can use this
template. Use it also for whole dialog
(see "About" dialog in system menu).
Usage:
Include ColorCtrl.h in your project.
Create control with dialog editor.
Add member variable for this control with class wizard.
Replace CCtrlClass m_ctrl
with CColorCtrl<CCtrlClass> m_ctrl
e.g. replace
CEdit m_edit; CStatic m_static;
with
CColorCtrl<CEdit> m_edit; CColorCtrl<CStatic> m_static;
Use the following functions to change colors:
void SetTextColor(COLORREF); COLORREF GetTextColor(); void SetTextBlinkColors(COLORREF, COLORREF); void SetBkColor(COLORREF); COLORREF GetBkColor(); void SetBkBlinkColors(COLORREF, COLORREF);
To set default color use CLR_DEFAULT
as argument.
To set system colors use macro CC_SYSCOLOR(index)
,
where "index
" is one of system color IDs
(see help on ::GetSysColor
).
This macro doesn’t call ::GetSysColor
,
but decorates index for further usage.
Use the folowing functions to start/stop blinking:
void StartBlink(int iWho, UINT nDelay); void StopBlink(int iWho); UINT GetDelay();
Argument can be one of :
CC_BLINK_TEXT
CC_BLINK_BK
CC_BLINK_BOTH
Argument "nDelay
" can be one of :
CC_BLINK_NOCHANGE
– doesn’t change blinking speed
CC_BLINK_FAST
CC_BLINK_NORMAL
– default
CC_BLINK_SLOW
- any other value specified in miliseconds
In version 1.2 two derived classes CColorCtrlEx
and CBlinkCtrlEx
were added, that allow you to preset control
colors on template level.
E.g. CColorCtrlEx<CStatic, RGB(255,0,0), RGB(0,255,0)> m_static;
will create static control with initial red text and green background.
Warning! Don’t use these two classes together with one control.
Use this control if you want to change font style or
font height of your control.
Class supports combinations
of the folowing styles:
- Bold
- Italic
- Underline
- Strikeout
Usage:
Include FontCtrl.h in your project.
Create control with dialog editor.
Add member variable for this control with class wizard.
Replace CCtrlClass m_ctrl
with CFontCtrl<CCtrlClass> m_ctrl
e.g. replace
CEdit m_edit; CStatic m_static;
with
CFontCtrl<CEdit> m_edit; CFontCtrl<CStatic> m_static;
Use the following functions to change font style and height:
void ChangeFontStyle(int fAdd, int fRemove = 0, BOOL fRedraw = TRUE); void ChangeFontHeight(int nHeight, BOOL fRedraw = TRUE); void SetFont(CFont* pFont, BOOL bRedraw = TRUE); void SetFont(LOGFONT& lf, BOOL bRedraw = TRUE);
Arguments "fAdd
" and "fRemove
"
can be combined from the following values:
FC_FONT_BOLD
FC_FONT_ITALIC
FC_FONT_UNDERLINE
FC_FONT_STRIKEOUT
When you use functions SetFont
together with ChangeFont*
in any order – resulting font will have combination of styles, and height
specified in ChangeFontHeight
(if not equal to
zero).
In version 1.1 derived class CFontCtrlEx
was added,
that allow you to preset font style and height on
template level. E.g. CFontCtrlEx<CStatic,
will create static
FC_FONT_BOLD|FC_FONT_UNDERLINE, 30> m_static;
control with bold, underlined text and text height equal to 30.
Also four classes for basic styles added: CBoldCtrl, CItalicCtrl, CUnderlineCtrl, CStrikeoutCtrl
Warning! Don’t use these five classes together with one control.
If your control doesn’t contain font (e.g. you create it in code
by call to Create
function)
CFontCtrl
cannot change font style/height. In this
case use one of SetFont
functions to set font
to your control. If you create control on base of one of five
derived classes – don’t worry – predefined style/height
will be added to selected font.
Common Notes
Any function of any class can be called even before window created.
You can use both classes together for single control:
CFontCtrl<CColorCtrl<CStatic> > m_static; // or CColorCtrl<CFontCtrl<CStatic> > m_static; // or typedef CFontCtrl<CStatic> CFontStatic; CColorCtrl<CFontStatic> m_static; // or even typedef CFontCtrlEx<CStatic, FC_FONT_BOLD|FC_FONT_UNDERLINE, 30> CBoldUnderlineStatic; CColorCtrlEx<CBoldUnderlineStatic, RGB(255,0,0), RGB(0,255,0)> m_static;