---
name: "QwtPlotPanner"
section: "3"
platform: "linux"
package: "libqwt-doc"
version: "6.1.4-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtPlotPanner"
---

# QwtPlotPanner(3)

QwtPlotPanner provides panning of a plot canvas.

## NAME

QwtPlotPanner - **QwtPlotPanner** provides panning of a plot canvas.

## SYNOPSIS

`#include <qwt_plot_panner.h>`

Inherits **QwtPanner**.

### Public Member Functions

**QwtPlotPanner** (QWidget \*)\
 A panner for the canvas of a **QwtPlot**.  virtual **~QwtPlotPanner** ()\
 Destructor.  QWidget \* **canvas** ()\
 Return observed plot canvas.  const QWidget \* **canvas** () const\
 Return Observed plot canvas.  **QwtPlot** \* **plot** ()\
 Return plot widget, containing the observed plot canvas.  const **QwtPlot** \* **plot** () const\
 Return plot widget, containing the observed plot canvas.  void **setAxisEnabled** (int axis, bool on)\
 En/Disable an axis.  bool **isAxisEnabled** (int axis) const\

### Protected Slots

virtual void **moveCanvas** (int dx, int dy)\

### Protected Member Functions

virtual QBitmap **contentsMask** () const\
 virtual QPixmap **grab** () const\

### Additional Inherited Members

## Detailed Description

**QwtPlotPanner** provides panning of a plot canvas.

**QwtPlotPanner** is a panner for a plot canvas, that adjusts the scales of the axes after dropping the canvas on its new position.

Together with **QwtPlotZoomer** and **QwtPlotMagnifier** powerful ways of navigating on a **QwtPlot** widget can be implemented easily.

**Note:**

The axes are not updated, while dragging the canvas

**See also:**

**QwtPlotZoomer**, **QwtPlotMagnifier**

## Constructor & Destructor Documentation

### QwtPlotPanner::QwtPlotPanner (QWidget \* canvas)` [explicit]`

A panner for the canvas of a **QwtPlot**. The panner is enabled for all axes

**Parameters:**

*canvas* Plot canvas to pan, also the parent object

**See also:**

**setAxisEnabled()**

## Member Function Documentation

### QBitmap QwtPlotPanner::contentsMask () const` [protected]`, ` [virtual]`

Calculate a mask from the border path of the canvas

**Returns:**

Mask as bitmap

**See also:**

**QwtPlotCanvas::borderPath()**

Reimplemented from **QwtPanner**.

### QPixmap QwtPlotPanner::grab () const` [protected]`, ` [virtual]`

**Returns:**

Pixmap with the content of the canvas

Reimplemented from **QwtPanner**.

### bool QwtPlotPanner::isAxisEnabled (int axis) const

Test if an axis is enabled

**Parameters:**

*axis* Axis, see **QwtPlot::Axis**

**Returns:**

True, if the axis is enabled

**See also:**

**setAxisEnabled()**, **moveCanvas()**

### void QwtPlotPanner::moveCanvas (int dx, int dy)` [protected]`, ` [virtual]`, ` [slot]`

Adjust the enabled axes according to dx/dy

**Parameters:**

*dx* Pixel offset in x direction \
 *dy* Pixel offset in y direction

**See also:**

**QwtPanner::panned()**

### void QwtPlotPanner::setAxisEnabled (int axis, bool on)

En/Disable an axis. Axes that are enabled will be synchronized to the result of panning. All other axes will remain unchanged.

**Parameters:**

*axis* Axis, see **QwtPlot::Axis** \
 *on* On/Off

**See also:**

**isAxisEnabled()**, **moveCanvas()**

## Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.