Aufgabe 4: Kontextwechsel

Public Member Functions | Public Attributes | List of all members
Mouse Class Reference
I/O subsystem

Handles mouse movements and clicks. More...

#include <device/mouse.h>

+ Inheritance diagram for Mouse:
+ Collaboration diagram for Mouse:

Public Member Functions

 Mouse (unsigned max_x, unsigned max_y)
 Constructor. More...
 
void getPos (unsigned &x, unsigned &y) const
 Retrieve the current mouse position. More...
 
bool isPressed (MouseButton btn) const
 Check if a given mouse button is pressed. More...
 
void plugin ()
 Initialization of the mouse. More...
 
bool prologue () override
 Prologue of mouse interrupts. More...
 
void epilogue () override
 Epilogue of mouse interrupts. More...
 
- Public Member Functions inherited from Gate
 Gate ()
 Constructor.
 
virtual ~Gate ()
 Destructor. More...
 
virtual bool prologue ()=0
 Device-specific interrupt handling routine that is executed immediately after the interrupt occurs (asynchronously). More...
 
virtual void epilogue ()
 Possibly delayed, synchronously executed Device-specific interrupt handling routine. More...
 

Public Attributes

const unsigned MAX_X
 Maximum X position of the mouse.
 
const unsigned MAX_Y
 Maximum Y position of the mouse.
 

Detailed Description

Handles mouse movements and clicks.

This class ensures correct initialization of the mouse and, above all, its interrupt handling.

Constructor & Destructor Documentation

Mouse::Mouse ( unsigned  max_x,
unsigned  max_y 
)
inlineexplicit

Constructor.

Defines a virtual window for the mouse.

Parameters
max_xMaximum X position (excluding) for the mouse
max_yMaximum Y position (excluding) for the mouse

Member Function Documentation

void Mouse::getPos ( unsigned &  x,
unsigned &  y 
) const
inline

Retrieve the current mouse position.

Parameters
xReference to variable for the X position (0 ≤ x < MAX_X) of the mouse
yReference to variable for the Y position (0 ≤ y < MAX_Y) of the mouse
bool Mouse::isPressed ( MouseButton  btn) const
inline

Check if a given mouse button is pressed.

Parameters
btnButton to check for press
Returns
true if button is currently pressed
void Mouse::plugin ( )

Initialization of the mouse.

Initialization of the mouse and activation of the specific interrupt handling: The object will register itself at the Plugbox and configure the IOAPIC to receive the corresponding interrupts.

Note
The mouse interrupts should be configured as level triggered.
bool Mouse::prologue ( )
overridevirtual

Prologue of mouse interrupts.

This method directly handles interrupts caused by the mouse. The position of the mouse and the pressed buttons are calculated and stored in variables, which are used by the epilogue to draw the cursor on the screen.

Implements Gate.

void Mouse::epilogue ( )
overridevirtual

Epilogue of mouse interrupts.

The current position of the cursor is drawn on the screen using TextMode::showMouse(). Press and release events of the buttons are printed to the debug output.

Reimplemented from Gate.

The documentation for this class was generated from the following files: