This is Curve.m in view mode; [Download] [Up]
#import "draw.h"
/*
* This line is just a stub to get genstrings to generate
* a .strings file entry for the name of this type of Graphic.
* The name is used in the Undo New <Whatever> menu item.
*
* NXLocalString("Curve", NULL, "Name of the tool that draws curves, i.e., the %s of the New %s operation.")
*/
@implementation Curve
+ initialize
/*
* This bumps the class version so that we can compatibly read
* old Graphic objects out of an archive.
*/
{
[Curve setVersion:1];
return self;
}
- (float)arrowAngle:(int)corner
/*
* Since our control points are at a 90 degree angle, we'll draw our arrows
* at 90 degree angles (however, this method breaks down a bit as the bounds
* get very skinny--perhaps a better one could be found).
*/
{
if (gFlags.downhill) {
if (gFlags.goleft) {
switch (corner) {
case UPPER_RIGHT: return 90.0;
case LOWER_LEFT: return 180.0;
}
} else {
switch (corner) {
case UPPER_LEFT: return 90.0;
case LOWER_RIGHT: return 0.0;
}
}
} else {
if (gFlags.goleft) {
switch (corner) {
case UPPER_LEFT: return 180.0;
case LOWER_RIGHT: return -90.0;
}
} else {
switch (corner) {
case UPPER_RIGHT: return 0.0;
case LOWER_LEFT: return -90.0;
}
}
}
return 0.0;
}
- drawLine
/*
* Overridden from our superclass (Line).
* This is called from the draw method to actually do the drawing of the line,
* that way, we can inherit the arrow drawing, etc ...
*/
{
if (gFlags.downhill) {
if (gFlags.goleft) {
/* lower right curve */
PSCurve( bounds.origin.x + bounds.size.width,
bounds.origin.y + bounds.size.height,
bounds.origin.x + bounds.size.width,
bounds.origin.y,
bounds.origin.x + bounds.size.width,
bounds.origin.y,
bounds.origin.x,
bounds.origin.y);
} else {
/* lower left curve */
PSCurve(bounds.origin.x, bounds.origin.y + bounds.size.height,
bounds.origin.x, bounds.origin.y,
bounds.origin.x, bounds.origin.y,
bounds.origin.x + bounds.size.width, bounds.origin.y);
}
} else {
if (gFlags.goleft) {
/* upper right curve */
PSCurve(bounds.origin.x, bounds.origin.y + bounds.size.height,
bounds.origin.x + bounds.size.width,
bounds.origin.y + bounds.size.height,
bounds.origin.x + bounds.size.width,
bounds.origin.y + bounds.size.height,
bounds.origin.x + bounds.size.width, bounds.origin.y);
} else {
/* upper left curve */
PSCurve(bounds.origin.x, bounds.origin.y,
bounds.origin.x,
bounds.origin.y + bounds.size.height,
bounds.origin.x,
bounds.origin.y + bounds.size.height,
bounds.origin.x + bounds.size.width,
bounds.origin.y + bounds.size.height);
}
}
return self;
}
- (BOOL)hit:(const NXPoint *)p
/*
* Line only gets a hit if the mouse is within some tolerance of the line.
* Obviously that algorithm doesn't work for a curve. We could come up
* with the proper algorithm to only hit a curve if it is within a tolerance,
* but that would be complicated so we take the easy way out and just
* get a hit if it is anywhere in the bounds. It is unfortunate that we
* have to copy code from Graphic to accomplish this. Perhaps a better
* way exists?
*/
{
return (!gFlags.locked && gFlags.active && NXMouseInRect(p, &bounds, NO));
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.