RE: [Newbies] Project on squeak language

[Ron Teitelbaum]

 

 

From: roger mpouma
Sent: Monday, August 22, 2016 2:42 PM



 

Hi Ron,

I solved my problem, thank you for your help.

I got one more question, how can i add the possibility to erase parts of what i 
have already drawn as item "clear" but just parts of the drawing ? 

 

[Ron Teitelbaum] Of course everything is possible.  Your clear is doing just 
that, it’s filling in the canvas area with your background color.  There are 
number of ways to accomplish this.  A number of programs hold onto the results 
of each drawing collection (clicking and moving until you let go of the mouse) 
as a single element of the drawing.  Then you can ctrl –z to remove them in 
order.  To do something like that you need an instance of a class, something 
like Drawing, which holds a collection of brush strokes, colors and line 
widths,  and a collection on your canvas to apply the drawings in order to your 
canvas. An instance variable called drawings would work.   You could also 
calculate the intersection of a line and the position of the mouse pointer in 
the drawing to find each draw element and remove them when clicked.  You could 
also erase by simply overlaying the background color as another draw element, 
in other words, drawing a line with the background color on top of everything 
else is similar to erasing. 

 

Everything is possible!

 

All the best,

 

Ron Teitelbaum

 

2016-08-22 18:45 GMT+02:00 Ron Teitelbaum :

Hi Roger!  

 

That was a nice try!

 

I modified methods:

addCustomMenuItems: aCustomMenu hand: aHandMorph
super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
aCustomMenu add: 'clear' action: #clear.
drawColor := Color red.//modification
drawColor := Color yellow.//modification
drawColor := Color green. //modification
drawColor := Color blue.   //modification

[Ron Teitelbaum]

What this does is create a menu with one item clear and then it sets the 
drawColor to red yellow green and then blue.  Since blue is the last color you 
end up with blue.

Try creating drawRed, drawYellow, drawGreen, and drawBlue methods

For example

drawRed

   drawColor := Color red.

Now add to your menu properly.

aCustomMenu add: 'clear' action: #clear.
aCustomMenu add: 'red' action: #drawRed.

Where add is what you see in your menu and action is what happens when you 
select the menu item.  (it calls: self drawRed)

Do that with all your colors and you should be all set!

You can also add menu items to adjust the size of the brush.  Maybe make small 
brush, medium brush and large brush menu items?  Works the same way as changing 
color.  You need a brushSize instance variable. And initialize brushSize := 2.

All the best,

Ron Teitelbaum

initialize
super initialize.
self extent: 500@700.
drawColor := Color black.

mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 2.
brush color: drawColor.//modification
lastMouse := evt cursorPoint - bounds origin.
brush drawFrom: lastMouse to: lastMouse.
self invalidRect:
((lastMouse - brush sourceForm extent corner:
lastMouse + brush sourceForm extent)
translateBy: bounds origin).

The initial color is black.

When i click the command "change color" on the menu  and i chose for example 
the green color, the result is the blue color. I don't understand why ?

And after the first choice, i must restart the program with the Workspace for 
change another color. So i can't make several choices at the same time.

How can I solve these problems ? and to change size of the brush ? 

Thank you in advance.

 

2016-08-21 3:14 GMT+02:00 Ron Teitelbaum :

 

 

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 :

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: 

Re: [Newbies] Re: Project on squeak language

[roger mpouma]

Sorry it's an error from me, it's rather " "

2016-08-22 19:50 GMT+02:00 Joseph Alotta :

> Is //modification a new way of doing comments?
>
> Sent from my iPhone
>
> On Aug 22, 2016, at 11:45 AM, Ron Teitelbaum [via Smalltalk] <[hidden
> email] > wrote:
>
> Hi Roger!
>
>
>
> That was a nice try!
>
>
>
> I modified methods:
>
> addCustomMenuItems: aCustomMenu hand: aHandMorph
> super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
> aCustomMenu add: 'clear' action: #clear.
> drawColor := Color red.//modification
> drawColor := Color yellow.//modification
> drawColor := Color green. //modification
> drawColor := Color blue.   //modification
>
> *[Ron Teitelbaum]*
>
> *What this does is create a menu with one item clear and then it sets the
> drawColor to red yellow green and then blue.  Since blue is the last color
> you end up with blue.*
>
> *Try creating drawRed, drawYellow, drawGreen, and drawBlue methods*
>
> *For example*
>
> *drawRed*
>
> *   drawColor := Color red.*
>
> *Now add to your menu properly.*
>
> aCustomMenu add: 'clear' action: #clear.
> aCustomMenu add: 'red' action: #drawRed.
>
> *Where add is what you see in your menu and action is what happens when
> you select the menu item.  (it calls: self drawRed)*
>
> *Do that with all your colors and you should be all set!*
>
> *You can also add menu items to adjust the size of the brush.  Maybe make
> small brush, medium brush and large brush menu items?  Works the same way
> as changing color.  You need a brushSize instance variable. And initialize
> brushSize := 2.*
>
> *All the best,*
>
>
> *Ron Teitelbaum*
> initialize
> super initialize.
> self extent: 500@700.
> drawColor := Color black.
>
> mouseDown: evt
> brush := Pen newOnForm: form.
> brush roundNib: 2.
> brush color: drawColor.
> //modification
> lastMouse := evt cursorPoint - bounds origin.
> brush drawFrom: lastMouse to: lastMouse.
> self invalidRect:
> ((lastMouse - brush sourceForm extent corner:
> lastMouse + brush sourceForm extent)
> translateBy: bounds origin).
>
> The initial color is black.
>
> When i click the command "change color" on the menu  and i chose for
> example the green color, the result is the blue color. I don't understand
> why ?
>
> And after the first choice, i must restart the program with the Workspace
> for change another color. So i can't make several choices at the same time.
>
> How can I solve these problems ? and to change size of the brush ?
>
> Thank you in advance.
>
>
>
> 2016-08-21 3:14 GMT+02:00 Ron Teitelbaum <[hidden email]
> >:
>
>
>
>
>
> *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 <[hidden email]
> >:
>
> 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:* [hidden email]
>  [mailto:[hidden
> email] ] *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 

Re: [Newbies] Project on squeak language

[roger mpouma]

Hi Ron,

I solved my problem, thank you for your help.
I got one more question, how can i add the possibility to erase parts of
what i have already drawn as item "clear" but just parts of the drawing ?


2016-08-22 18:45 GMT+02:00 Ron Teitelbaum :

> Hi Roger!
>
>
>
> That was a nice try!
>
>
>
> I modified methods:
>
> addCustomMenuItems: aCustomMenu hand: aHandMorph
> super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
> aCustomMenu add: 'clear' action: #clear.
> drawColor := Color red.//modification
> drawColor := Color yellow.//modification
> drawColor := Color green. //modification
> drawColor := Color blue.   //modification
>
> *[Ron Teitelbaum]*
>
> *What this does is create a menu with one item clear and then it sets the
> drawColor to red yellow green and then blue.  Since blue is the last color
> you end up with blue.*
>
> *Try creating drawRed, drawYellow, drawGreen, and drawBlue methods*
>
> *For example*
>
> *drawRed*
>
> *   drawColor := Color red.*
>
> *Now add to your menu properly.*
>
> aCustomMenu add: 'clear' action: #clear.
> aCustomMenu add: 'red' action: #drawRed.
>
> *Where add is what you see in your menu and action is what happens when
> you select the menu item.  (it calls: self drawRed)*
>
> *Do that with all your colors and you should be all set!*
>
> *You can also add menu items to adjust the size of the brush.  Maybe make
> small brush, medium brush and large brush menu items?  Works the same way
> as changing color.  You need a brushSize instance variable. And initialize
> brushSize := 2.*
>
> *All the best,*
>
>
> *Ron Teitelbaum*
> initialize
> super initialize.
> self extent: 500@700.
> drawColor := Color black.
>
> mouseDown: evt
> brush := Pen newOnForm: form.
> brush roundNib: 2.
> brush color: drawColor.
> //modification
> lastMouse := evt cursorPoint - bounds origin.
> brush drawFrom: lastMouse to: lastMouse.
> self invalidRect:
> ((lastMouse - brush sourceForm extent corner:
> lastMouse + brush sourceForm extent)
> translateBy: bounds origin).
>
> The initial color is black.
>
> When i click the command "change color" on the menu  and i chose for
> example the green color, the result is the blue color. I don't understand
> why ?
>
> And after the first choice, i must restart the program with the Workspace
> for change another color. So i can't make several choices at the same time.
>
> How can I solve these problems ? and to change size of the brush ?
>
> Thank you in advance.
>
>
>
> 2016-08-21 3:14 GMT+02:00 Ron Teitelbaum :
>
>
>
>
>
> *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 :
>
> 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-boun...@lists.squeakfoundation.org [mailto:
> beginners-boun...@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

RE: [Newbies] Re: Project on squeak language

[Ron Teitelbaum]

 

From: Joseph Alotta
Sent: Monday, August 22, 2016 1:50 PM

 

Is //modification a new way of doing comments?



[Ron Teitelbaum] 

Good question Joe,

 

I assumed it was added to the email and not to code.

 

The comments would require quotes: " this is a comment "

 

All the best,

 

Ron Teitelbaum


Sent from my iPhone 


On Aug 22, 2016, at 11:45 AM, Ron Teitelbaum [via Smalltalk] <[hidden
email]> wrote:

Hi Roger!  

 

That was a nice try!

 

I modified methods:

addCustomMenuItems: aCustomMenu hand: aHandMorph
super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
aCustomMenu add: 'clear' action: #clear.
drawColor := Color red.//modification
drawColor := Color yellow.//modification
drawColor := Color green. //modification
drawColor := Color blue.   //modification

[Ron Teitelbaum]

What this does is create a menu with one item clear and then it sets the
drawColor to red yellow green and then blue.  Since blue is the last color
you end up with blue.

Try creating drawRed, drawYellow, drawGreen, and drawBlue methods

For example

drawRed

   drawColor := Color red.

Now add to your menu properly.

aCustomMenu add: 'clear' action: #clear.
aCustomMenu add: 'red' action: #drawRed.

Where add is what you see in your menu and action is what happens when you
select the menu item.  (it calls: self drawRed)

Do that with all your colors and you should be all set!

You can also add menu items to adjust the size of the brush.  Maybe make
small brush, medium brush and large brush menu items?  Works the same way as
changing color.  You need a brushSize instance variable. And initialize
brushSize := 2.

All the best,

Ron Teitelbaum

initialize
super initialize.
self extent: 500@700.
drawColor := Color black.

mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 2.
brush color: drawColor.
//modification
lastMouse := evt cursorPoint - bounds origin.
brush drawFrom: lastMouse to: lastMouse.
self invalidRect:
((lastMouse - brush sourceForm extent corner:
lastMouse + brush sourceForm extent)
translateBy: bounds origin).

The initial color is black.

When i click the command "change color" on the menu  and i chose for example
the green color, the result is the blue color. I don't understand why ?

And after the first choice, i must restart the program with the Workspace
for change another color. So i can't make several choices at the same time.

How can I solve these problems ? and to change size of the brush ? 

Thank you in advance.

 

2016-08-21 3:14 GMT+02:00 Ron Teitelbaum <[hidden email]>:

 

 

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 <[hidden email]>:

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: [hidden email] [mailto:[hidden email]] 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@350.
 
drawOn: aCanvas
aCanvas image: form at: bounds origin.
 
handlesMouseDown: evt
^ true 
 
mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 

[Newbies] Re: Project on squeak language

[Joseph Alotta]

Is //modification a new way of doing comments?

Sent from my iPhone 

> On Aug 22, 2016, at 11:45 AM, Ron Teitelbaum [via Smalltalk] 
>  wrote:
> 
> Hi Roger! 
> 
>  
> 
> That was a nice try!
> 
>  
> 
> I modified methods:
> 
> addCustomMenuItems: aCustomMenu hand: aHandMorph
> super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
> aCustomMenu add: 'clear' action: #clear.
> drawColor := Color red.//modification
> drawColor := Color yellow.//modification
> drawColor := Color green. //modification
> drawColor := Color blue.   //modification
> 
> [Ron Teitelbaum]
> 
> What this does is create a menu with one item clear and then it sets the 
> drawColor to red yellow green and then blue.  Since blue is the last color 
> you end up with blue.
> 
> Try creating drawRed, drawYellow, drawGreen, and drawBlue methods
> 
> For example
> 
> drawRed
> 
>drawColor := Color red.
> 
> Now add to your menu properly.
> 
> aCustomMenu add: 'clear' action: #clear.
> aCustomMenu add: 'red' action: #drawRed.
> 
> Where add is what you see in your menu and action is what happens when you 
> select the menu item.  (it calls: self drawRed)
> 
> Do that with all your colors and you should be all set!
> 
> You can also add menu items to adjust the size of the brush.  Maybe make 
> small brush, medium brush and large brush menu items?  Works the same way as 
> changing color.  You need a brushSize instance variable. And initialize 
> brushSize := 2.
> 
> All the best,
> 
> Ron Teitelbaum
> 
> initialize
> super initialize.
> self extent: 500@700.
> drawColor := Color black.
> 
> mouseDown: evt
> brush := Pen newOnForm: form.
> brush roundNib: 2.
> brush color: drawColor.//modification
> lastMouse := evt cursorPoint - bounds origin.
> brush drawFrom: lastMouse to: lastMouse.
> self invalidRect:
> ((lastMouse - brush sourceForm extent corner:
> lastMouse + brush sourceForm extent)
> translateBy: bounds origin).
> 
> 
> The initial color is black.
> 
> When i click the command "change color" on the menu  and i chose for example 
> the green color, the result is the blue color. I don't understand why ?
> 
> And after the first choice, i must restart the program with the Workspace for 
> change another color. So i can't make several choices at the same time.
> 
> How can I solve these problems ? and to change size of the brush ?
> 
> Thank you in advance.
> 
>  
> 
> 2016-08-21 3:14 GMT+02:00 Ron Teitelbaum <[hidden email]>:
> 
>  
> 
>  
> 
> 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 <[hidden email]>:
> 
> 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: [hidden email] [mailto:[hidden email]] 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 

RE: [Newbies] Project on squeak language

[Ron Teitelbaum]

Hi Roger!  

 

That was a nice try!

 

I modified methods:

addCustomMenuItems: aCustomMenu hand: aHandMorph
super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
aCustomMenu add: 'clear' action: #clear.
drawColor := Color red.//modification
drawColor := Color yellow.//modification
drawColor := Color green. //modification
drawColor := Color blue.   //modification

[Ron Teitelbaum]

What this does is create a menu with one item clear and then it sets the 
drawColor to red yellow green and then blue.  Since blue is the last color you 
end up with blue.

Try creating drawRed, drawYellow, drawGreen, and drawBlue methods

For example

drawRed

   drawColor := Color red.

Now add to your menu properly.

aCustomMenu add: 'clear' action: #clear.
aCustomMenu add: 'red' action: #drawRed.

Where add is what you see in your menu and action is what happens when you 
select the menu item.  (it calls: self drawRed)

Do that with all your colors and you should be all set!

You can also add menu items to adjust the size of the brush.  Maybe make small 
brush, medium brush and large brush menu items?  Works the same way as changing 
color.  You need a brushSize instance variable. And initialize brushSize := 2.

All the best,

Ron Teitelbaum

initialize
super initialize.
self extent: 500@700.
drawColor := Color black.

mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 2.
brush color: drawColor.//modification
lastMouse := evt cursorPoint - bounds origin.
brush drawFrom: lastMouse to: lastMouse.
self invalidRect:
((lastMouse - brush sourceForm extent corner:
lastMouse + brush sourceForm extent)
translateBy: bounds origin).



The initial color is black.

When i click the command "change color" on the menu  and i chose for example 
the green color, the result is the blue color. I don't understand why ?

And after the first choice, i must restart the program with the Workspace for 
change another color. So i can't make several choices at the same time.

How can I solve these problems ? and to change size of the brush ? 

Thank you in advance.

 

2016-08-21 3:14 GMT+02:00 Ron Teitelbaum :

 

 

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 :

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-boun...@lists.squeakfoundation.org 
[mailto:beginners-boun...@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@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: 

Re: [Newbies] Project on squeak language

[roger mpouma]

I modified methods:

addCustomMenuItems: aCustomMenu hand: aHandMorph
super addCustomMenuItems: aCustomMenu hand:  aHandMorph.
aCustomMenu add: 'clear' action: #clear.
drawColor := Color red.//modification
drawColor := Color yellow.//modification
drawColor := Color green. //modification
drawColor := Color blue.   //modification

initialize
super initialize.
self extent: 500@700.
drawColor := Color black.

mouseDown: evt
brush := Pen newOnForm: form.
brush roundNib: 2.
brush color: drawColor.
//modification
lastMouse := evt cursorPoint - bounds origin.
brush drawFrom: lastMouse to: lastMouse.
self invalidRect:
((lastMouse - brush sourceForm extent corner:
lastMouse + brush sourceForm extent)
translateBy: bounds origin).


The initial color is black.
When i click the command "change color" on the menu  and i chose for
example the green color, the result is the blue color. I don't understand
why ?
And after the first choice, i must restart the program with the Workspace
for change another color. So i can't make several choices at the same time.

How can I solve these problems ? and to change size of the brush ?

Thank you in advance.

2016-08-21 3:14 GMT+02:00 Ron Teitelbaum :

>
>
>
>
> *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 :
>
> 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-boun...@lists.squeakfoundation.org [mailto:
> beginners-boun...@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@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