[Newbies] Project on squeak language
Ron Teitelbaum
ron at usmedrec.com
Sun Aug 21 01:14:56 UTC 2016
From: roger mpouma
Sent: Saturday, August 20, 2016 2:42 PM
How can i make this please ?
I thought to add "color" and "size" commands as "clear" command in the custom menu code. After that, add "color" and "size" methods...
[Ron Teitelbaum]
What I was thinking is making buttons on the panel. Color buttons with a highlight around it so you can see what is selected. You could instead add something like Red or Blue to the menu.
On your class add some instance variable called drawColor or something like that.
When the menu item Red is called you would do
drawColor := Color red.
Then in mouseDown:
brush color: drawColor.
Initialize your color to something like black
Initialize
drawColor := Color black.
So that the user is not required to use the menu to get the default color (black).
Hope that helps,
Ron
2016-08-20 20:26 GMT+02:00 Ron Teitelbaum <ron at usmedrec.com>:
Have you considered having a menu bar with colors and line sizes. The users can select the color and line size which will change your program to use those settings.
All the best,
Ron Teitelbaum
From: beginners-bounces at lists.squeakfoundation.org [mailto:beginners-bounces at lists.squeakfoundation.org] On Behalf Of roger mpouma
Sent: Saturday, August 20, 2016 1:51 PM
To: A friendly place to get answers to even the most basic questions about Squeak.
Subject: Re: [Newbies] Project on squeak language
I have already implemented the canvas on which we draw, the possibility of drawing with the brush but with only a single color and a single size, a capacity to erase what we have already drawn with the "Clear" command on the custom menu code.
So, i'd like to add the possibility of changing the color and the size of the brush presenting the choices of color and brush size.
The differents methods are:
"Methods"
extent: aPoint
| newForm |
super extent: aPoint.
newForm := Form extent: self extent depth: 16.
newForm fillColor: Color veryLightGray.
form ifNotNil: [form displayOn: newForm].
form := newForm.
initialize
super initialize.
self extent: 500 at 350.
drawOn: aCanvas
aCanvas image: form at: bounds origin.
handlesMouseDown: evt
^ true
mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 3.
brush color: Color red.
lastMouse := evt cursorPoint - bounds origin.
brush drawFrom: lastMouse to: lastMouse.
self invalidRect:
((lastMouse - brush sourceForm extent corner:
lastMouse + brush sourceForm extent)
translateBy: bounds origin).
mouseMove: evt
| p |
p := evt cursorPoint - bounds origin.
p = lastMouse ifTrue: [^ self].
brush drawFrom: lastMouse to: p.
self invalidRect: ((
((lastMouse min: p) - brush sourceForm extent) corner:
((lastMouse max: p) + brush sourceForm extent))
translateBy: bounds origin).
lastMouse := p.
addCustomMenuItems: aCustomMenu hand: aHandMorph
super addCustomMenuItems: aCustomMenu hand: aHandMorph.
aCustomMenu add: 'clear' action: #clear.
clear
form fillColor: Color veryLightGray.
self changed.
"Class PaintMorph"
Morph subclass: #PaintMorph
instanceVariableNames: 'form brush lastMouse'
classVariableNames: ''
poolDictionaries: ''
category: 'Morphic-Fun'
"Workspace"
PaintMorph new openInWorld.
Thank you in advance.
2016-08-20 18:47 GMT+02:00 Bert Freudenberg <bert at freudenbergs.de>:
Sure. Just ask some specific questions - e.g. what you tried, what worked, what didn't etc.
- Bert -
On Sat, Aug 20, 2016 at 10:59 AM, roger mpouma <rmpouma at gmail.com> wrote:
Hello,
I need help for a drawing project on Squeak. I'd like implement a canvas on which we draw with the possibility of drawing with brush changing the color and size of the brush. Is it possibile to have help ?
Thank you in advance.
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