A special scale draw made for QwtDial.
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#include <qwt_dial.h>
List of all members.
Public Types |
enum | ScaleComponent {
Backbone = 1,
Ticks = 2,
Labels = 4
} |
Public Member Functions |
QPoint | center () const |
virtual void | draw (QPainter *, const QPalette &) const |
void | enableComponent (ScaleComponent, bool enable=true) |
virtual int | extent (const QPen &, const QFont &) const |
bool | hasComponent (ScaleComponent) const |
virtual QwtText | label (double value) const |
int | majTickLength () const |
const QwtScaleMap & | map () const |
int | minimumExtent () const |
void | moveCenter (const QPoint &) |
void | moveCenter (int x, int y) |
uint | penWidth () const |
| QwtDialScaleDraw (QwtDial *) |
int | radius () const |
const QwtScaleDiv & | scaleDiv () const |
QwtScaleMap & | scaleMap () |
void | setAngleRange (double angle1, double angle2) |
void | setMinimumExtent (int) |
void | setPenWidth (uint) |
void | setRadius (int radius) |
void | setScaleDiv (const QwtScaleDiv &s) |
void | setSpacing (int margin) |
void | setTickLength (QwtScaleDiv::TickType, int length) |
void | setTransformation (QwtScaleTransformation *) |
int | spacing () const |
int | tickLength (QwtScaleDiv::TickType) const |
Protected Member Functions |
virtual void | drawBackbone (QPainter *p) const |
virtual void | drawLabel (QPainter *p, double val) const |
virtual void | drawTick (QPainter *p, double val, int len) const |
void | invalidateCache () |
const QwtText & | tickLabel (const QFont &, double value) const |
Detailed Description
A special scale draw made for QwtDial.
- See also:
- QwtDial, QwtCompass
Member Enumeration Documentation
Constructor & Destructor Documentation
QwtDialScaleDraw::QwtDialScaleDraw |
( |
QwtDial * |
parent | ) |
[explicit] |
Member Function Documentation
QPoint QwtRoundScaleDraw::center |
( |
| ) |
const [inherited] |
Get the center of the scale.
void QwtAbstractScaleDraw::draw |
( |
QPainter * |
painter, |
|
|
const QPalette & |
palette |
|
) |
| const [virtual, inherited] |
Draw the scale.
- Parameters:
-
painter | The painter |
palette | Palette, text color is used for the labels, foreground color for ticks and backbone |
void QwtRoundScaleDraw::drawBackbone |
( |
QPainter * |
painter | ) |
const [protected, virtual, inherited] |
void QwtRoundScaleDraw::drawLabel |
( |
QPainter * |
painter, |
|
|
double |
value |
|
) |
| const [protected, virtual, inherited] |
void QwtRoundScaleDraw::drawTick |
( |
QPainter * |
painter, |
|
|
double |
value, |
|
|
int |
len |
|
) |
| const [protected, virtual, inherited] |
void QwtAbstractScaleDraw::enableComponent |
( |
ScaleComponent |
component, |
|
|
bool |
enable = true |
|
) |
| [inherited] |
En/Disable a component of the scale
- Parameters:
-
component | Scale component |
enable | On/Off |
- See also:
- hasComponent()
int QwtRoundScaleDraw::extent |
( |
const QPen & |
pen, |
|
|
const QFont & |
font |
|
) |
| const [virtual, inherited] |
Calculate the extent of the scale
The extent is the distcance between the baseline to the outermost pixel of the scale draw. radius() + extent() is an upper limit for the radius of the bounding circle.
- Parameters:
-
pen | Pen that is used for painting backbone and ticks |
font | Font used for painting the labels |
- See also:
- setMinimumExtent(), minimumExtent()
- Warning:
- The implemented algo is not too smart and calculates only an upper limit, that might be a few pixels too large
Implements QwtAbstractScaleDraw.
bool QwtAbstractScaleDraw::hasComponent |
( |
ScaleComponent |
component | ) |
const [inherited] |
void QwtAbstractScaleDraw::invalidateCache |
( |
| ) |
[protected, inherited] |
QwtText QwtDialScaleDraw::label |
( |
double |
value | ) |
const [virtual] |
int QwtAbstractScaleDraw::majTickLength |
( |
| ) |
const [inherited] |
The same as QwtAbstractScaleDraw::tickLength(QwtScaleDiv::MajorTick).
const QwtScaleMap & QwtAbstractScaleDraw::map |
( |
| ) |
const [inherited] |
- Returns:
- Map how to translate between scale and pixel values
int QwtAbstractScaleDraw::minimumExtent |
( |
| ) |
const [inherited] |
void QwtRoundScaleDraw::moveCenter |
( |
int |
x, |
|
|
int |
y |
|
) |
| [inline, inherited] |
Move the center of the scale draw, leaving the radius unchanged.
void QwtRoundScaleDraw::moveCenter |
( |
const QPoint & |
center | ) |
[inherited] |
Move the center of the scale draw, leaving the radius unchanged
- Parameters:
-
- See also:
- setRadius()
uint QwtDialScaleDraw::penWidth |
( |
| ) |
const |
int QwtRoundScaleDraw::radius |
( |
| ) |
const [inherited] |
Get the radius
Radius is the radius of the backbone without ticks and labels.
- See also:
- setRadius(), extent()
const QwtScaleDiv & QwtAbstractScaleDraw::scaleDiv |
( |
| ) |
const [inherited] |
QwtScaleMap & QwtAbstractScaleDraw::scaleMap |
( |
| ) |
[inherited] |
- Returns:
- Map how to translate between scale and pixel values
void QwtRoundScaleDraw::setAngleRange |
( |
double |
angle1, |
|
|
double |
angle2 |
|
) |
| [inherited] |
Adjust the baseline circle segment for round scales.
The baseline will be drawn from min(angle1,angle2) to max(angle1, angle2). The default setting is [ -135, 135 ]. An angle of 0 degrees corresponds to the 12 o'clock position, and positive angles count in a clockwise direction.
- Parameters:
-
angle1 | |
angle2 | boundaries of the angle interval in degrees. |
- Warning:
-
The angle range is limited to [-360, 360] degrees. Angles exceeding this range will be clipped.
-
For angles more than 359 degrees above or below min(angle1, angle2), scale marks will not be drawn.
-
If you need a counterclockwise scale, use QwtScaleDiv::setRange
void QwtAbstractScaleDraw::setMinimumExtent |
( |
int |
minExtent | ) |
[inherited] |
Set a minimum for the extent.
The extent is calculated from the coomponents of the scale draw. In situations, where the labels are changing and the layout depends on the extent (f.e scrolling a scale), setting an upper limit as minimum extent will avoid jumps of the layout.
- Parameters:
-
- See also:
- extent(), minimumExtent()
void QwtDialScaleDraw::setPenWidth |
( |
uint |
penWidth | ) |
|
void QwtRoundScaleDraw::setRadius |
( |
int |
radius | ) |
[inherited] |
Change of radius the scale
Radius is the radius of the backbone without ticks and labels.
- Parameters:
-
- See also:
- moveCenter()
void QwtAbstractScaleDraw::setScaleDiv |
( |
const QwtScaleDiv & |
sd | ) |
[inherited] |
Change the scale division
- Parameters:
-
void QwtAbstractScaleDraw::setSpacing |
( |
int |
spacing | ) |
[inherited] |
Set the spacing between tick and labels.
The spacing is the distance between ticks and labels. The default spacing is 4 pixels.
- Parameters:
-
- See also:
- spacing()
Set the length of the ticks
- Parameters:
-
tickType | Tick type |
length | New length |
- Warning:
- the length is limited to [0..1000]
Change the transformation of the scale
- Parameters:
-
transformation | New scale transformation |
int QwtAbstractScaleDraw::spacing |
( |
| ) |
const [inherited] |
Get the spacing.
The spacing is the distance between ticks and labels. The default spacing is 4 pixels.
- See also:
- setSpacing()
const QwtText & QwtAbstractScaleDraw::tickLabel |
( |
const QFont & |
font, |
|
|
double |
value |
|
) |
| const [protected, inherited] |
Convert a value into its representing label and cache it.
The conversion between value and label is called very often in the layout and painting code. Unfortunately the calculation of the label sizes might be slow (really slow for rich text in Qt4), so it's necessary to cache the labels.
- Parameters:
-
- Returns:
- Tick label