"""DotView.py -- A one-window app demonstrating how to write a custom NSView.
To build the demo program, run this line in Terminal.app:
$ python setup.py py2app -A
This creates a directory "dist" containing DotView.app. (The
-A option causes the files to be symlinked to the .app bundle instead
of copied. This means you don't have to rebuild the app if you edit the
sources or nibs.)
"""
# Created by Etienne Posthumus on Thu Dec 26 2002, after Apple's
# ObjC DotView example.
# Edited and enhanced by JvR, 2003.
#
# The main difference with the Apple DotView demo is that our custom view
# is embedded in a scroll view. It turns out that this is almost no work
# in InterfaceBuilder (select the view, then go to Layout -> Make subvies of
# -> Scroll View), and *no* work in the code. It was too easy, so for kicks
# I added zoom functionality and a "Show rulers" checkbox.
from Cocoa import *
from PyObjCTools import AppHelper
ZOOM = 2.0
# class defined in MainMenu.nib
class DotView(NSView):
colorWell = objc.IBOutlet()
sizeSlider = objc.IBOutlet()
def initWithFrame_(self, frame):
self.center = (50.0, 50.0)
super(DotView, self).initWithFrame_(frame)
self.radius = 10.0
self.color = NSColor.redColor()
return self
def awakeFromNib(self):
self.colorWell.setColor_(self.color)
self.sizeSlider.setFloatValue_(self.radius)
scrollView = self.superview().superview()
scrollView.setHasHorizontalRuler_(1)
scrollView.setHasVerticalRuler_(1)
@objc.IBAction
def zoomIn_(self, sender):
(x, y), (bw, bh) = self.bounds()
(x, y), (fw, fh) = self.frame()
self.setBoundsSize_((bw / ZOOM, bh / ZOOM))
self.setFrameSize_((fw * ZOOM, fh * ZOOM))
self.setNeedsDisplay_(True)
@objc.IBAction
def zoomOut_(self, sender):
(x, y), (bw, bh) = self.bounds()
(x, y), (fw, fh) = self.frame()
self.setBoundsSize_((bw * ZOOM, bh * ZOOM))
self.setFrameSize_((fw / ZOOM, fh / ZOOM))
self.setNeedsDisplay_(True)
@objc.IBAction
def setRulersVisible_(self, button):
scrollView = self.superview().superview()
scrollView.setRulersVisible_(button.state())
def isOpaque(self):
return True
def mouseDown_(self, event):
eventLocation = event.locationInWindow()
if event.modifierFlags() & NSCommandKeyMask:
clipView = self.superview()
self.originalPoint = eventLocation
self.originalOffset = clipView.bounds()[0]
else:
self.center = self.convertPoint_fromView_(eventLocation, None)
self.setNeedsDisplay_(True)
self.autoscroll_(event)
def mouseDragged_(self, event):
if event.modifierFlags() & NSCommandKeyMask:
clipView = self.superview()
eventLocation = event.locationInWindow()
ox, oy = self.originalPoint
x, y = eventLocation
dx, dy = x - ox, y - oy
x, y = self.originalOffset
ox, oy = clipView.constrainScrollPoint_((x - dx, y - dy))
clipView.scrollToPoint_((ox, oy))
clipView.superview().reflectScrolledClipView_(clipView)
else:
self.mouseDown_(event)
def drawRect_(self, rect):
NSColor.whiteColor().set()
NSRectFill(self.bounds())
origin = (self.center[0]-self.radius, self.center[1]-self.radius)
size = (2 * self.radius, 2 * self.radius)
dotRect = (origin, size)
self.color.set()
NSBezierPath.bezierPathWithOvalInRect_(dotRect).fill()
@objc.IBAction
def setRadius_(self, sender):
self.radius = sender.floatValue()
self.setNeedsDisplay_(True)
@objc.IBAction
def setColor_(self, sender):
self.color = sender.color()
self.setNeedsDisplay_(True)
if __name__ == "__main__":
AppHelper.runEventLoop()
|