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QTabletEvent

QTabletEvent class contains parameters that describe a Tablet event. 更多 …

Inheritance diagram of PySide2.QtGui.QTabletEvent

概要

函数

详细描述

平板事件 由数位板外围设备 (譬如 Wacom 数位板及各种其它品牌) 和电磁手写笔设备 (包括采用某些类型的数位板计算机) 生成。(不同于 QTouchEvent 触摸屏生成，即使在触摸屏上使用无源手写笔。)

数位板事件类似于鼠标事件；例如， x() , y() , pos() , globalX() , globalY() ，和 globalPos() accessors provide the cursor position, and you can see which buttons() are pressed (pressing the stylus tip against the tablet surface is equivalent to a left mouse button). But tablet events also pass through some extra information that the tablet device driver provides; for example, you might want to do subpixel rendering with higher resolution coordinates ( globalPosF() ), adjust color brightness based on the pressure() of the tool against the tablet surface, use different brushes depending on the type of tool in use ( deviceType() ), modulate the brush shape in some way according to the X-axis and Y-axis tilt of the tool with respect to the tablet surface ( xTilt() and yTilt() ), and use a virtual eraser instead of a brush if the user switches to the other end of a double-ended stylus ( pointerType() ).

Every event contains an accept flag that indicates whether the receiver wants the event. You should call accept() if you handle the tablet event; otherwise it will be sent to the parent widget. The exception are TabletEnterProximity and TabletLeaveProximity events: these are only sent to QApplication and do not check whether or not they are accepted.

setEnabled() function can be used to enable or disable mouse, tablet and keyboard events for a widget.

事件处理程序 tabletEvent() receives TabletPress , TabletRelease and TabletMove events. Qt will first send a tablet event, then if it is not accepted by any widget, it will send a mouse event. This allows users of applications that are not designed for tablets to use a tablet like a mouse. However high-resolution drawing applications should handle the tablet events, because they can occur at a higher frequency, which is a benefit for smooth and accurate drawing. If the tablet events are rejected, the synthetic mouse events may be compressed for efficiency.

New in Qt 5.4: QTabletEvent includes all information available from the device, including buttons() . Previously it was not possible to accept all tablet events and also know which stylus buttons were pressed.

Note that pressing the stylus button while the stylus hovers over the tablet will generate a button press on some types of tablets, while on other types it will be necessary to press the stylus against the tablet surface in order to register the simultaneous stylus button press.

X11 用户注意事项

If the tablet is configured in xorg.conf to use the Wacom driver, there will be separate XInput “devices” for the stylus, eraser, and (optionally) cursor and touchpad. Qt recognizes these by their names. Otherwise, if the tablet is configured to use the evdev driver, there will be only one device and applications may not be able to distinguish the stylus from the eraser.

Windows 用户注意事项

Tablet support currently requires the WACOM windows driver providing the DLL wintab32.dll to be installed. It is contained in older packages, for example pentablet_5.3.5-3.exe .

class QTabletEvent ( t , pos , globalPos , device , pointerType , pressure , xTilt , yTilt , tangentialPressure , rotation , z , keyState , uniqueID )

注意

This constructor is deprecated.

QTabletEvent(t, pos, globalPos, device, pointerType, pressure, xTilt, yTilt, tangentialPressure, rotation, z, keyState, uniqueID, button, buttons)

param globalPos

QPointF

param rotation

qreal

param z

int

param uniqueID

qint64

param pointerType

int

param buttons

MouseButtons

param pos

QPointF

param device

int

param yTilt

int

param xTilt

int

param button

MouseButton

param keyState

KeyboardModifiers

param t

Type

param pressure

qreal

param tangentialPressure

qreal

构造数位板事件为给定 type .

pos parameter indicates where the event occurred in the widget; globalPos is the corresponding position in absolute coordinates.

pressure contains the pressure exerted on the device .

pointerType 描述正在使用的笔类型。

xTilt and yTilt contain the device’s degree of tilt from the x and y axes respectively.

keyState specifies which keyboard modifiers are pressed (e.g., Ctrl).

uniqueID parameter contains the unique ID for the current device.

z parameter contains the coordinate of the device on the tablet, this is usually given by a wheel on 4D mouse. If the device does not support a Z-axis, pass zero here.

tangentialPressure parameter contins the tangential pressure of an air brush. If the device does not support tangential pressure, pass 0 here.

rotation contains the device’s rotation in degrees. 4D mice support rotation. If the device does not support rotation, pass 0 here.

in 5.4: use the constructor with MouseButton status

另请参阅

pos() globalPos() device() pressure() xTilt() yTilt() uniqueId() rotation() tangentialPressure() z()

构造数位板事件为给定 type .

pos parameter indicates where the event occurred in the widget; globalPos is the corresponding position in absolute coordinates.

pressure contains the pressure exerted on the device .

pointerType 描述正在使用的笔类型。

xTilt and yTilt contain the device’s degree of tilt from the x and y axes respectively.

keyState specifies which keyboard modifiers are pressed (e.g., Ctrl).

uniqueID parameter contains the unique ID for the current device.

z parameter contains the coordinate of the device on the tablet, this is usually given by a wheel on 4D mouse. If the device does not support a Z-axis, pass zero here.

tangentialPressure parameter contins the tangential pressure of an air brush. If the device does not support tangential pressure, pass 0 here.

rotation contains the device’s rotation in degrees. 4D mice, the Wacom Art Pen, and the Apple Pencil support rotation. If the device does not support rotation, pass 0 here.

button that caused the event is given as a value from the MouseButton 枚举。若事件 type 不是 TabletPress or TabletRelease , the appropriate button for this event is NoButton .

buttons 是事件发生时的所有按钮状态。

另请参阅

pos() globalPos() device() pressure() xTilt() yTilt() uniqueId() rotation() tangentialPressure() z()

PySide2.QtGui.QTabletEvent. TabletDevice

此枚举定义生成事件的设备类型。

常量

描述

QTabletEvent.NoDevice

没有设备，或未知设备。

QTabletEvent.Puck

游标 (类似扁平鼠标的设备，带有十字准线透明圆圈)。

QTabletEvent.Stylus

手写笔。

QTabletEvent.Airbrush

喷枪

QTabletEvent.FourDMouse

4D 鼠标。

QTabletEvent.RotationStylus

特殊手写笔，还知道旋转 (6D 手写笔)。

PySide2.QtGui.QTabletEvent. PointerType

此枚举定义生成事件是什么点类型。

常量

描述

QTabletEvent.UnknownPointer

未知设备。

QTabletEvent.Pen

像手写笔设备的尖端 (笔的窄端)。

QTabletEvent.Cursor

任何像游标的设备。

QTabletEvent.Eraser

像手写笔设备的橡皮擦端 (笔的宽端)。

另请参阅

pointerType()

PySide2.QtGui.QTabletEvent. button ( )
返回类型

MouseButton

返回导致事件的按钮。

注意：返回值始终是 NoButton for TabletMove , TabletEnterProximity and TabletLeaveProximity 事件。

另请参阅

buttons() MouseButton

PySide2.QtGui.QTabletEvent. buttons ( )
返回类型

MouseButtons

Returns the button state when the event was generated. The button state is a combination of buttons from the MouseButton enum using the OR operator. For TabletMove events, this is all buttons that are pressed down. For TabletPress events this includes the button that caused the event. For TabletRelease events this excludes the button that caused the event.

另请参阅

button() MouseButton

PySide2.QtGui.QTabletEvent. device ( )
返回类型

TabletDevice

注意

此函数被弃用。

使用 deviceType() .

PySide2.QtGui.QTabletEvent. deviceType ( )
返回类型

TabletDevice

返回生成事件的设备类型。

另请参阅

TabletDevice

PySide2.QtGui.QTabletEvent. globalPos ( )
返回类型

QPoint

Returns the global position of the device at the time of the event . This is important on asynchronous windows systems like X11; whenever you move your widgets around in response to mouse events, can differ significantly from the current position pos() .

另请参阅

globalX() globalY()

PySide2.QtGui.QTabletEvent. globalPosF ( )
返回类型

QPointF

Returns the global position of the device at the time of the event . This is important on asynchronous windows systems like X11; whenever you move your widgets around in response to mouse events, can differ significantly from the current position pos() .

另请参阅

posF()

PySide2.QtGui.QTabletEvent. globalX ( )
返回类型

int

返回事件发生时鼠标指针的全局 x 位置。

另请参阅

globalY() globalPos() hiResGlobalX()

PySide2.QtGui.QTabletEvent. globalY ( )
返回类型

int

返回事件发生时数位板设备的全局 y 位置。

另请参阅

globalX() globalPos() hiResGlobalY()

PySide2.QtGui.QTabletEvent. hiResGlobalX ( )
返回类型

qreal

注意

此函数被弃用。

The high precision x position of the tablet device.

use globalPosF()

PySide2.QtGui.QTabletEvent. hiResGlobalY ( )
返回类型

qreal

注意

此函数被弃用。

The high precision y position of the tablet device.

use globalPosF()

PySide2.QtGui.QTabletEvent. pointerType ( )
返回类型

PointerType

返回生成事件的点类型。

PySide2.QtGui.QTabletEvent. pos ( )
返回类型

QPoint

返回设备位置，相对接收事件 Widget。

若为响应鼠标事件而移动 Widget，使用 globalPos() instead of this function.

另请参阅

x() y() globalPos()

PySide2.QtGui.QTabletEvent. posF ( )
返回类型

QPointF

返回设备位置，相对接收事件 Widget。

若为响应鼠标事件而移动 Widget，使用 globalPosF() instead of this function.

另请参阅

globalPosF()

PySide2.QtGui.QTabletEvent. pressure ( )
返回类型

qreal

Returns the pressure for the device. 0.0 indicates that the stylus is not on the tablet, 1.0 indicates the maximum amount of pressure for the stylus.

另请参阅

tangentialPressure()

PySide2.QtGui.QTabletEvent. rotation ( )
返回类型

qreal

Returns the rotation of the current tool in degrees, where zero means the tip of the stylus is pointing towards the top of the tablet, a positive value means it’s turned to the right, and a negative value means it’s turned to the left. This can be given by a 4D Mouse or a rotation-capable stylus (such as the Wacom Art Pen or the Apple Pencil). If the device does not support rotation, this value is always 0.0.

PySide2.QtGui.QTabletEvent. tangentialPressure ( )
返回类型

qreal

Returns the tangential pressure for the device. This is typically given by a finger wheel on an airbrush tool. The range is from -1.0 to 1.0. 0.0 indicates a neutral position. Current airbrushes can only move in the positive direction from the neutrual position. If the device does not support tangential pressure, this value is always 0.0.

另请参阅

pressure()

PySide2.QtGui.QTabletEvent. uniqueId ( )
返回类型

qint64

Returns a unique ID for the current device, making it possible to differentiate between multiple devices being used at the same time on the tablet.

此特征的支持从属数位板。

同一设备的值可能因操作系统而异。

Later versions of the Wacom driver for Linux will now report the ID information. If you have a tablet that supports unique ID and are not getting the information on Linux, consider upgrading your driver.

As of Qt 4.2, the unique ID is the same regardless of the orientation of the pen. Earlier versions would report a different value when using the eraser-end versus the pen-end of the stylus on some OS’s.

另请参阅

pointerType()

PySide2.QtGui.QTabletEvent. x ( )
返回类型

int

返回设备的 x 位置，相对接收事件 Widget。

另请参阅

y() pos()

PySide2.QtGui.QTabletEvent. xTilt ( )
返回类型

int

Returns the angle between the device (a pen, for example) and the perpendicular in the direction of the x axis. Positive values are towards the tablet’s physical right. The angle is in the range -60 to +60 degrees.

../../_images/qtabletevent-tilt.png

另请参阅

yTilt()

PySide2.QtGui.QTabletEvent. y ( )
返回类型

int

返回设备的 y 位置，相对接收事件 Widget。

另请参阅

x() pos()

PySide2.QtGui.QTabletEvent. yTilt ( )
返回类型

int

Returns the angle between the device (a pen, for example) and the perpendicular in the direction of the y axis. Positive values are towards the bottom of the tablet. The angle is within the range -60 to +60 degrees.

另请参阅

xTilt()

PySide2.QtGui.QTabletEvent. z ( )
返回类型

int

Returns the z position of the device. Typically this is represented by a wheel on a 4D Mouse. If the device does not support a Z-axis, this value is always zero. This is not the same as pressure.

另请参阅

pressure()