moustrap.prn
来自「又一个关于鼠标驱动的C程序」· PRN 代码 · 共 2,261 行 · 第 1/5 页
PRN
2,261 行
Set_Mouse_Text_Cursor(0,0,TC(' ',4,4));
Now, we describe how the mouse cursor will look. We start with
something simple. We'll use a software cursor, with no screen mask.
We use the macro TC(), defined in MOUSTRAP.H, to build a cursor
which is just a space, with a red foreground (color 4) on a red
background.
Add_Mouse_Button(0,M_Middle,'2');
For our first button definition, we'll say that anytime the
Middle button is pressed, Read_Mouse will return an ASCII
character '2', regardless of what page is active (provided at
least one page IS active).
Add_Mouse_Button(z,M_Left,'1');
Next we'll have pressing the Left button return an ASCII
'1' whenever page Z is active.
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Add_Mouse_Button(z,M_Right,0);
Add_Mouse_Hot_Spot(z,M_Right,7,13,13,18,'C');
Now, we add our first Hot Spot. Here, we must first declare
the Right button in Page Z, then we declare the area in the rectangle
(7,13) - (13,18) as a hot spot returning the character 'C' when that
button is pressed while page Z is active. Since no other hot spot is
defined, clicking the right button outside that area will return 0,
just as if no click had occurred.
Add_Mouse_Button(y,M_Left,0);
Add_Mouse_Hot_Spot(y,M_Left,15,20,24,30,'L');
Add_Mouse_Hot_Spot(y,M_Left,15,30,24,40,'R');
Continuing in a similar vein, we define two hot spots in page Y.
When the Left button is pressed, if the cursor is in the left side
we'll get the character 'L', while the right side return the character
'R'.
do {
Activate_Mouse_Page(z);
As we enter the loop, we activate page Z. The mouse cursor is
"turned on" with it's movement limited to the edges of the page.
c=Get_Char_Mouse_Kbd();
printf("Page Z: Character \"%c\"",c);
We stop, and get a character from either the keyboard (which is
not much fun), or via the mouse; and print it.
Activate_Mouse_Page(y);
c=Get_Char_Mouse_Kbd();
printf("Page Y: Character \"%c\"",c);
Now, we activate page Y (which automatically deactivates page
Z). The mouse cursor moves into the new area, and it's motion is
limited to that range. We get another character and print it.
} while (c!='Q');
Clear_All_Mouse_Definitions();
Define_Mouse_System(M_Overlaid_Pages);
Now, we want to start over, so we clear all the old definitions,
and restart, but this time using overlaid pages.
y=Add_Mouse_Page(M_Text_Coord,15,20,24,40);
z=Add_Mouse_Page(M_Text_Coord,5,10,15,20);
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Add_Mouse_Button(0,M_Middle,'2');
Add_Mouse_Button(z,M_Left,'1');
Add_Mouse_Button(z,M_Right,0);
Add_Mouse_Hot_Spot(z,M_Right,7,13,13,18,'C');
Add_Mouse_Button(y,M_Left,0);
Add_Mouse_Hot_Spot(y,M_Left,15,20,24,30,'L');
Add_Mouse_Hot_Spot(y,M_Left,15,30,24,40,'R');
Set_Mouse_Text_Cursor(0,0,TC('+',4,2));
We'll redefine all of our pages, buttons, and hot spots, exactly
as we did the first time. We'll also change the mouse cursor, this
time to something a bit more exciting than before, a red plus sign
on a green background (color 2).
do {
Activate_Mouse_Page(z);
c=Get_Char_Mouse_Kbd();
printf("Page Z: Character \"%c\"",c);
Again, we activate page Z, and get a character from it. This
works exactly as it did in the first loop using single page mode.
DeActivate_Mouse_Page(z);
Activate_Mouse_Page(y);
c=Get_Char_Mouse_Kbd();
printf("Page Y: Character \"%c\"",c);
And again, we activate page Y, and get a character from it. The
only difference is that we had to first deactivate page Z.
Activate_Mouse_Page(z);
c=Get_Char_Mouse_Kbd();
printf("Page Y & Z: Character \"%c\"",c);
Now we get flashy. Without deactivate page Y, we'll reactivate
page Z. You will notice that the mouse can now move within a much
larger area, specifically the rectangle which circumscribes both of
the smaller rectangle. Notice that if you click the left button in
the area that is not within the boundaries of either page, "1" will
be return. This is because the button definition says to return "1"
whenever page Z is active, regardless of where the cursor is, even
if it is outside the stated area of Page Z. However, notice that
the Hot Spots of the left button in page Y, take precedence over this.
This is because the BUTTON definition on page Y was give after the
button definition off page Z, and therefore overrules it.
DeActivate_Mouse_Page(y);
Now, we deactivate page Y, leaving only page Z. Notice that the
mouse's movements are once again restricted to the area of page Z.
(See..I told you that I would fix this problem with release 1.01)
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}
}
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You should also remember that, although we always used ASCII
characters for return values in the example, ANY character or integer
value, in the range of 1 to 65534, can be used.
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Chapter 5
Technical Specification
This chapter is provided only to those who have paid to become
registered uses. This was done because I assumed that it would be of
little use to anyone who didn't have the source code (which also comes
with registration). This method also gives me a few extra weeks to
write it.
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February 12, 1989
Chapter 6
Appendix
A. MOUSTRAP.H
B. Global Variables
C. Error Codes
D. Reference
E. Support
F. Release History
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Appendix A : MOUSTRAP.H
The header file, MOUSTRAP.H should be included in every C
program which uses the MouseTrap Library functions. It includes
complete function prototypes for each of the MouseTrap Library functions.
In addition, it defines a number of constants which are to be used
with the functions. These include:
M_Overlaid_Pages -and- M_Single_Pages, which are used
with the function Define_Mouse_System.
M_Text_Coord -and- M_Graphic_Coord, which are used with the
Add_Mouse_Page function, to tell which system screen coordinates
are being given in.
M_Left, M_Right, M_Center, -and- M_Middle, which are used to
refer to the mouse buttons whenever necessary. Note that M_Center
and M_Middle are equivalent, and you may use whichever holds
your fancy.
M_HORIZ -and- M_VERT, which are used with Set_Mouse_Limits.
MERROR -and- MNOERROR, (-1 and 0, respectively), which are
return by various functions to indicate whether an error
occurred. Also defined are a large number of error codes, which
are discussed further in appendix C.
The macro TC() is used to create an integer value in the form
BFCC, where B is the background color, F, the foreground color,
and CC is a character. This value is used by Set_Mouse_Text_Cursor,
(and by other routines outside of the MouseTrap Library
which perform direct screen writes). The macro require that you
give it the character, foreground and background color code. The
statement TC('A',14,5) would produce the code 5E41h, which mean
the letter 'A' in bright Yellow on a Magenta background.
It also declared three global variables, which are described
in Appendix B.
Also defined is the data type "mouse_t" which is used to define
vitually every variable used in the MouseTrap functions. Also
included are the structure definitions for Pages, buttons, and
hot spots. I'll not should what you can use them for, but I
thought you might be interested.
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