.TH "QwtCounter" 3 "Fri Apr 15 2011" "Version 6.0.0" "Qwt User's Guide" \" -*- nroff -*-
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.SH NAME
QwtCounter \- 
.PP
The Counter Widget.  

.SH SYNOPSIS
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.PP
.PP
\fC#include <qwt_counter.h>\fP
.PP
Inherits \fBQwtDoubleRange\fP.
.SS "Public Types"

.in +1c
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.RI "enum \fBButton\fP { \fBButton1\fP, \fBButton2\fP, \fBButton3\fP, \fBButtonCnt\fP }"
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.SS "Signals"

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.RI "void \fBbuttonReleased\fP (double value)"
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.RI "void \fBvalueChanged\fP (double value)"
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.SS "Public Member Functions"

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.RI "\fBQwtCounter\fP (QWidget *parent=NULL)"
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.RI "virtual \fB~QwtCounter\fP ()"
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.RI "bool \fBeditable\fP () const "
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.RI "void \fBsetEditable\fP (bool)"
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.RI "void \fBsetNumButtons\fP (int n)"
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.RI "int \fBnumButtons\fP () const "
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.RI "void \fBsetIncSteps\fP (\fBQwtCounter::Button\fP btn, int nSteps)"
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.RI "int \fBincSteps\fP (\fBQwtCounter::Button\fP btn) const "
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.RI "virtual void \fBsetValue\fP (double)"
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.RI "virtual QSize \fBsizeHint\fP () const "
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.RI "double \fBstep\fP () const "
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.RI "void \fBsetStep\fP (double s)"
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.RI "double \fBminValue\fP () const "
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.RI "void \fBsetMinValue\fP (double m)"
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.RI "double \fBmaxValue\fP () const "
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.RI "void \fBsetMaxValue\fP (double m)"
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.RI "void \fBsetStepButton1\fP (int nSteps)"
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.RI "int \fBstepButton1\fP () const "
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.RI "void \fBsetStepButton2\fP (int nSteps)"
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.RI "int \fBstepButton2\fP () const "
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.RI "void \fBsetStepButton3\fP (int nSteps)"
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.RI "int \fBstepButton3\fP () const "
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.RI "virtual double \fBvalue\fP () const "
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.SS "Protected Member Functions"

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.RI "virtual bool \fBevent\fP (QEvent *)"
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.RI "virtual void \fBwheelEvent\fP (QWheelEvent *)"
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.RI "virtual void \fBkeyPressEvent\fP (QKeyEvent *)"
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.RI "virtual void \fBrangeChange\fP ()"
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.SH "Detailed Description"
.PP 
The Counter Widget. 

A Counter consists of a label displaying a number and one ore more (up to three) push buttons on each side of the label which can be used to increment or decrement the counter's value.
.PP
A Counter has a range from a minimum value to a maximum value and a step size. The range can be specified using QwtDblRange::setRange(). The counter's value is an integer multiple of the step size. The number of steps by which a button increments or decrements the value can be specified using \fBQwtCounter::setIncSteps()\fP. The number of buttons can be changed with \fBQwtCounter::setNumButtons()\fP.
.PP
Holding the space bar down with focus on a button is the fastest method to step through the counter values. When the counter underflows/overflows, the focus is set to the smallest up/down button and counting is disabled. Counting is re-enabled on a button release event (mouse or space bar).
.PP
Example: 
.PP
.nf
#include '../include/qwt_counter.h>

QwtCounter *cnt;

cnt = new QwtCounter(parent, name);

cnt->setRange(0.0, 100.0, 1.0);             // From 0.0 to 100, step 1.0
cnt->setNumButtons(2);                      // Two buttons each side
cnt->setIncSteps(QwtCounter::Button1, 1);   // Button 1 increments 1 step
cnt->setIncSteps(QwtCounter::Button2, 20);  // Button 2 increments 20 steps

connect(cnt, SIGNAL(valueChanged(double)), my_class, SLOT(newValue(double)));

.fi
.PP
 
.SH "Member Enumeration Documentation"
.PP 
.SS "enum \fBQwtCounter::Button\fP"
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Button index. 
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\fBEnumerator: \fP
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.TP
\fB\fIButton1 \fP\fP
Button intended for minor steps. 
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\fB\fIButton2 \fP\fP
Button intended for medium steps. 
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\fB\fIButton3 \fP\fP
Button intended for large steps. 
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\fB\fIButtonCnt \fP\fP
Number of buttons. 
.SH "Constructor & Destructor Documentation"
.PP 
.SS "QwtCounter::QwtCounter (QWidget *parent = \fCNULL\fP)\fC [explicit]\fP"The default number of buttons is set to 2. The default increments are: 
.PD 0

.IP "\(bu" 2
Button 1: 1 step 
.IP "\(bu" 2
Button 2: 10 steps 
.IP "\(bu" 2
Button 3: 100 steps
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\fBParameters:\fP
.RS 4
\fIparent\fP 
.RE
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.SS "QwtCounter::~QwtCounter ()\fC [virtual]\fP"
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Destructor. 
.SH "Member Function Documentation"
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.SS "void QwtCounter::buttonReleased (doublevalue)\fC [signal]\fP"This signal is emitted when a button has been released 
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\fBParameters:\fP
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\fIvalue\fP The new value 
.RE
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.SS "bool QwtCounter::editable () const"
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returns whether the line edit is edatble. (default is yes) 
.SS "bool QwtCounter::event (QEvent *event)\fC [protected, virtual]\fP"Handle PolishRequest events 
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\fBParameters:\fP
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\fIevent\fP Event 
.RE
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.SS "int QwtCounter::incSteps (\fBQwtCounter::Button\fPbutton) const"\fBReturns:\fP
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the number of steps by which a specified button increments the value or 0 if the button is invalid. 
.RE
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\fBParameters:\fP
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\fIbutton\fP Button index
.RE
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\fBSee also:\fP
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\fBsetIncSteps()\fP 
.RE
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.SS "void QwtCounter::keyPressEvent (QKeyEvent *event)\fC [protected, virtual]\fP"Handle key events
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.IP "\(bu" 2
Ctrl + Qt::Key_Home
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 Step to \fBminValue()\fP
.IP "\(bu" 2
Ctrl + Qt::Key_End
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 Step to \fBmaxValue()\fP
.IP "\(bu" 2
Qt::Key_Up
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 Increment by incSteps(QwtCounter::Button1)
.IP "\(bu" 2
Qt::Key_Down
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 Decrement by incSteps(QwtCounter::Button1)
.IP "\(bu" 2
Qt::Key_PageUp
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 Increment by incSteps(QwtCounter::Button2)
.IP "\(bu" 2
Qt::Key_PageDown
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 Decrement by incSteps(QwtCounter::Button2)
.IP "\(bu" 2
Shift + Qt::Key_PageUp
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 Increment by incSteps(QwtCounter::Button3)
.IP "\(bu" 2
Shift + Qt::Key_PageDown
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 Decrement by incSteps(QwtCounter::Button3)
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\fBParameters:\fP
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\fIevent\fP Key event 
.RE
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.SS "double QwtCounter::maxValue () const"
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returns the maximum value of the range 
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Reimplemented from \fBQwtDoubleRange\fP.
.SS "double QwtCounter::minValue () const"
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returns the minimum value of the range 
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Reimplemented from \fBQwtDoubleRange\fP.
.SS "int QwtCounter::numButtons () const"\fBReturns:\fP
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The number of buttons on each side of the widget. 
.RE
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.SS "void QwtCounter::rangeChange ()\fC [protected, virtual]\fP"
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Notify change of range. This function updates the enabled property of all buttons contained in \fBQwtCounter\fP. 
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Reimplemented from \fBQwtDoubleRange\fP.
.SS "void QwtCounter::setEditable (booleditable)"
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Allow/disallow the user to manually edit the value. \fBParameters:\fP
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\fIeditable\fP true enables editing 
.RE
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\fBSee also:\fP
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\fBeditable()\fP 
.RE
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.SS "void QwtCounter::setIncSteps (\fBQwtCounter::Button\fPbutton, intnSteps)"Specify the number of steps by which the value is incremented or decremented when a specified button is pushed.
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\fBParameters:\fP
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\fIbutton\fP Button index 
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\fInSteps\fP Number of steps
.RE
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\fBSee also:\fP
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\fBincSteps()\fP 
.RE
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.SS "void QwtCounter::setMaxValue (doublevalue)"Set the maximum value of the range
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\fBParameters:\fP
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\fIvalue\fP Maximum value 
.RE
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\fBSee also:\fP
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\fBsetMinValue()\fP, maxVal() 
.RE
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.SS "void QwtCounter::setMinValue (doublevalue)"Set the minimum value of the range
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\fBParameters:\fP
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\fIvalue\fP Minimum value 
.RE
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\fBSee also:\fP
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\fBsetMaxValue()\fP, \fBminValue()\fP 
.RE
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.SS "void QwtCounter::setNumButtons (intnumButtons)"
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Specify the number of buttons on each side of the label. \fBParameters:\fP
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\fInumButtons\fP Number of buttons 
.RE
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.SS "void QwtCounter::setStep (doublestepSize)"Set the step size 
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\fBParameters:\fP
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\fIstepSize\fP Step size 
.RE
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\fBSee also:\fP
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\fBQwtDoubleRange::setStep()\fP 
.RE
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.PP
Reimplemented from \fBQwtDoubleRange\fP.
.SS "void QwtCounter::setStepButton1 (intnSteps)"Set the number of increment steps for button 1 
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\fBParameters:\fP
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\fInSteps\fP Number of steps 
.RE
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.SS "void QwtCounter::setStepButton2 (intnSteps)"Set the number of increment steps for button 2 
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\fBParameters:\fP
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\fInSteps\fP Number of steps 
.RE
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.SS "void QwtCounter::setStepButton3 (intnSteps)"Set the number of increment steps for button 3 
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\fBParameters:\fP
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\fInSteps\fP Number of steps 
.RE
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.SS "void QwtCounter::setValue (doublevalue)\fC [virtual]\fP"
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Set a new value. Calls \fBQwtDoubleRange::setValue\fP and does all visual updates.
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\fBParameters:\fP
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\fIvalue\fP New value 
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\fBSee also:\fP
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\fBQwtDoubleRange::setValue()\fP 
.RE
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.PP
Reimplemented from \fBQwtDoubleRange\fP.
.SS "QSize QwtCounter::sizeHint () const\fC [virtual]\fP"
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A size hint. 
.SS "double QwtCounter::step () const"
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returns the step size 
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Reimplemented from \fBQwtDoubleRange\fP.
.SS "int QwtCounter::stepButton1 () const"
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returns the number of increment steps for button 1 
.SS "int QwtCounter::stepButton2 () const"
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returns the number of increment steps for button 2 
.SS "int QwtCounter::stepButton3 () const"
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returns the number of increment steps for button 3 
.SS "double QwtCounter::value () const\fC [virtual]\fP"\fBReturns:\fP
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Current value 
.RE
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.PP
Reimplemented from \fBQwtDoubleRange\fP.
.SS "void QwtCounter::valueChanged (doublevalue)\fC [signal]\fP"This signal is emitted when the counter's value has changed 
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\fBParameters:\fP
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\fIvalue\fP The new value 
.RE
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.SS "void QwtCounter::wheelEvent (QWheelEvent *event)\fC [protected, virtual]\fP"Handle wheel events 
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\fBParameters:\fP
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\fIevent\fP Wheel event 
.RE
.PP


.SH "Author"
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