| rectmove |
(Rectangle rect, double dx, double dx) |
typedict.Graphics |
| rectmove |
(Number x, Number y, Number width, Number height, double dx, double dy) |
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Copies the pixels contained in
rect,
or the rectangle that has
(x, y)
as its upper left corner and
width
and
height
as its dimensions, to the rectangle that has its upper left corner translated by
dx
and
dy
and then the source rectangle, minus any overlap with the destination, is erased.
The arguments are all transformed to device space using
CTM
and results are used to select the source pixels and the destination rectangle.
rectmove
makes no use of or changes to the current
path.
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| Example: |
The program,
import yoix.*.*;
JFrame f = {
Array layout = {
new JCanvas {
Color background = Color.black;
int panandzoom = 0x000400;
Graphics graphics = {
String font = "Helvetica-bold-12";
};
Rectangle cell = {
double x = 72;
double y = 72;
double width = 72;
double height = 36;
};
Point pressedpoint = NULL;
paint(rect) {
Rectangle bounds = NULL;
double x;
double y;
bounds = graphics.font.stringbounds("Drag Me");
x = cell.x + (cell.width - bounds.width)/2;
y = cell.y + (cell.height - bounds.height)/2 - bounds.y;
graphics {
gsave();
setgray(.7);
rectbutton(cell, 72.0/32);
setrgbcolor(1, 0, 0);
moveto(x, y);
show("Drag Me");
grestore();
}
}
mouseDragged(e) {
double dx;
double dy;
if (pressedpoint) {
dx = e.coordinates.x - pressedpoint.x;
dy = e.coordinates.y - pressedpoint.y;
pressedpoint.x += dx;
pressedpoint.y += dy;
graphics.rectmove(cell, dx, dy);
}
}
mousePressed(e) {
if (pointInRect(e.coordinates, cell))
pressedpoint = e.coordinates;
}
mouseReleased(e) {
pressedpoint = NULL;
}
},
};
};
f.visible = TRUE;
paints a "raised" rectangle on the canvas using
rectbutton,
draws some text in that rectangle, and defines event handlers that let you drag
it around on the canvas using
rectmove.
In addition we set
panandzoom
to enable the mouse wheel zooming.
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| Return: |
none
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| See Also: |
clip,
clippath,
drawablebbox,
eoclip,
eoerase,
eofill,
erase,
erasedrawable,
fill,
ineofill,
infill,
instroke,
rectbutton,
rectclip,
rectcopy,
recterase,
rectfill,
rectstroke,
stroke,
strokepath
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Yoix is a registered trademark of AT&T Inc.
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