Colored/Blinking Controls and Dialogs with any Font

April 5, 2000
By Yury Goltsman

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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.

CColorCtrl v1.2

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.

CFontCtrl v1.1

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, 
FC_FONT_BOLD|FC_FONT_UNDERLINE, 30> m_static;

will create 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;