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{
This file is part of the Free Pascal run time library.
Copyright (c) 2013,2019 by Nikolay Nikolov (nickysn@users.sourceforge.net)
Copyright (c) 1999-2000 by Florian Klaempfl
member of the Free Pascal development team
This file implements mouse input support for ptcgraph.
It is similar to the winmouse and msmouse units.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit ptcmouse;
{$MODE objfpc}
interface
{ initializes the mouse with the default values for the current screen mode }
function InitMouse: Boolean;
{ shows mouse pointer,text+graphics screen support }
procedure ShowMouse;
{ hides mouse pointer }
procedure HideMouse;
{ reads mouse position in pixels (divide by 8 to get text position in standard
text mode) and reads the buttons state:
bit 1 set -> left button pressed
bit 2 set -> right button pressed
bit 3 set -> middle button pressed
Have a look at the example program in the manual to see how you can use this }
procedure GetMouseState(var x, y, buttons: LongInt);
{ returns true if the left button is pressed }
function LPressed: Boolean;
{ returns true if the right button is pressed }
function RPressed: Boolean;
{ returns true if the middle button is pressed }
function MPressed: Boolean;
{ positions the mouse pointer }
procedure SetMousePos(x,y: LongInt);
(*!!!!! the following functions aren't implemented yet:
{ returns at which position "button" was last pressed in x,y and returns the
number of times this button has been pressed since the last time this
function was called with "button" as parameter. For button you can use the
LButton, RButton and MButton constants for resp. the left, right and middle
button }
function GetLastButtonPress(button: LongInt; var x, y: LongInt): LongInt;
{ returns at which position "button" was last released in x,y and returns the
number of times this button has been re since the last time. For button
you can use the LButton, RButton and MButton constants for resp. the left,
right and middle button
}
function GetLastButtonRelease(button: LongInt; var x, y: LongInt): LongInt;
{ sets mouse's x range, with Min and Max resp. the higest and the lowest
column (in pixels) in between which the mouse cursor can move }
procedure SetMouseXRange(Min, Max: LongInt);
{ sets mouse's y range, with Min and Max resp. the higest and the lowest
row (in pixels) in between which the mouse cursor can move}
procedure SetMouseYRange(Min, Max: LongInt);
{ set the window coordinates in which the mouse cursor can move }
procedure SetMouseWindow(x1, y1, x2, y2: LongInt);
{ sets the mouse shape in text mode: background and foreground color and the
Ascii value with which the character on screen is XOR'ed when the cursor
moves over it. Set to 0 for a "transparent" cursor}
procedure SetMouseShape(ForeColor, BackColor, Ascii: Byte);
{ sets the mouse ascii in text mode. The difference between this one and
SetMouseShape, is that the foreground and background colors stay the same
and that the Ascii code you enter is the character that you will get on
screen; there's no XOR'ing }
procedure SetMouseAscii(Ascii: Byte);
{ set mouse speed in mickey's/pixel; default: horizontal: 8; vertical: 16 }
procedure SetMouseSpeed(Horizontal, Vertical: LongInt);
{ set a rectangle on screen that mouse will disappear if it is moved into }
procedure SetMouseHideWindow(x1, y1, x2, y2: LongInt);
*)
const
LButton = 1; { left button }
RButton = 2; { right button }
MButton = 4; { middle button }
var
MouseFound: Boolean;
implementation
uses
ptcgraph, ptc, ptcwrapper;
function InGraphMode: Boolean;
begin
Result := (PTCWrapperObject <> nil) and (PTCWrapperObject.IsOpen);
end;
var
MouseX, MouseY: LongInt;
MouseButtonState: Byte;
procedure GetMouseEvents;
var
ev: IPTCEvent;
MouseEv: IPTCMouseEvent;
begin
if not InGraphMode then
begin
MouseX := 0;
MouseY := 0;
MouseButtonState := 0;
exit;
end;
repeat
PTCWrapperObject.NextEvent(ev, False, [PTCMouseEvent]);
if ev <> nil then
begin
case ev.EventType of
PTCMouseEvent:
begin
MouseEv := ev as IPTCMouseEvent;
MouseX := MouseEv.X;
MouseY := MouseEv.Y;
MouseButtonState := 0;
if PTCMouseButton1 in MouseEv.ButtonState then
MouseButtonState := MouseButtonState or LButton;
if PTCMouseButton2 in MouseEv.ButtonState then
MouseButtonState := MouseButtonState or RButton;
if PTCMouseButton3 in MouseEv.ButtonState then
MouseButtonState := MouseButtonState or MButton;
end;
end;
end;
until ev = nil;
end;
function InitMouse: Boolean;
begin
GetMouseEvents;
InitMouse := MouseFound;
end;
procedure ShowMouse;
begin
GetMouseEvents;
if InGraphMode then
PTCWrapperObject.Option('show cursor');
end;
procedure HideMouse;
begin
GetMouseEvents;
if InGraphMode then
PTCWrapperObject.Option('hide cursor');
end;
function LPressed: Boolean;
begin
GetMouseEvents;
LPressed := (MouseButtonState and LButton) <> 0;
end;
function RPressed: Boolean;
begin
GetMouseEvents;
RPressed := (MouseButtonState and RButton) <> 0;
end;
function MPressed: Boolean;
begin
GetMouseEvents;
MPressed := (MouseButtonState and MButton) <> 0;
end;
procedure GetMouseState(var x, y, buttons: LongInt);
begin
GetMouseEvents;
x := MouseX;
y := MouseY;
buttons := MouseButtonState;
end;
procedure SetMousePos(x,y: LongInt);
begin
if InGraphMode then
PTCWrapperObject.MoveMouseTo(x, y);
end;
begin
MouseFound := True;
end.
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