B4J Question [B4X] B4XPages + B4XDrawer -- Setting the "Random Background" Color for the Entire Form

[JGParamo]

In Erel's B4X] B4XPages + B4XDrawer tutorial, the sample code does not completely set the "Random Background" color when the form is resized using the mouse. I have tried various code modifications in B4J but to no avail. How could I do it Erel or anyone? Thanks.

 

[DonManfred]

or anyone?

Upload a small project showing the problem.
Noone can help with the info you provided.

 

[JGParamo]

Upload a small project showing the problem.
Noone can help with the info you provided.

Thank you DonManfred for the quick reply. It is Erel's sample project at B4X] B4XPages + B4XDrawer, downloadable at https://www.b4x.com/android/forum/attachments/3-pages-drawer-zip.97233/

 

[DonManfred]

It does work here

 

[JGParamo]

It does work here

Did you tried resizing/increasing the form size? My observation occurs when increasing form size, particularly when aspect ratio is not maintained.

 

[DonManfred]

Did you tried resizing/increasing the form size? My observation occurs when increasing form size, particularly when aspect ratio is not maintained.

Yes, i changed the size in any variation.

 

[JGParamo]

I can't figure-out why mine won't do despite no change was done with the code. Attaching clip.

 

[DonManfred]

I can't figure-out why mine won't do despite no change was done with the code

Maybe the java version which is used. I use Java 11.0.1 from this site.

 

[JGParamo]

Maybe the java version which is used. I use Java 11.0.1 from this site.

Did tried using JDK 11.0.1 now but no effect.

 

[DonManfred]

Attaching clip

I see it.

I can´t be of more help here, sorry.

 

[JGParamo]

Code improvement might be needed but I couldn't figure it out. Did some additional code at B4XPage2 similar with B4XPage3

Sub B4XPage_Resize (Width As Int, Height As Int)
    ClearImage
    cvs.Resize(Width, Height)
End Sub

something like this

Sub B4XPage_Resize (Width As Int, Height As Int)
    B4XPages.GetNativeParent(Me).BackColor  = xui.Color_Red
End Sub

but says type mismatch, can't find a way to do it.

 

[KiloBravo]

I just downloaded and tried. I get the same result as JGParamo.

 

[KiloBravo]

I just downloaded and tried. I get the same result as JGParamo.

Windows 11
B4J v10.00 64bit
C:\java\jdk-14.0.1\bin\javac.exe

 

[JGParamo]

My intention is to have the Page2 form background have the same color as the background color of cvs B4XCanvas of Page3.

 

[KiloBravo]

Yes, and after my Page2 form background color "was copied" from Page 3, but it does not resize as I resize page 2. I get the White Edges around the random color. So seems like I get the same result as you.

 

[JGParamo]

Yes, and after my Page2 form background color "was copied" from Page 3, but it does not resize as I resize page 2. I get the White Edges around the random color. So seems like I get the same result as you.

Thanks KiloBravo, probably Erel can help us on this.

 

[aeric]

First, I believe the project is just an example.

Second, the issue is whether you have resized Page 3, after you closed it and you open it again, the window size is back to original size which is 600 X 600.

Third, Page 2 is using an ImageView to load the "saved" image "converted" from Page 3's Canvas.

 

[aeric]

If you only want to change the background color, you don't need to use Canvas and ImageView.

 

[JGParamo]

Thanks aeric, upon setting the canvas color randomly in Page3

Sub B4XPage_MenuClick (Tag As String)
    If Tag = "Random Background" Then
        cvs.DrawRect(cvs.TargetRect, Rnd(xui.Color_Black, xui.Color_White), True, 0)
        cvs.Invalidate
    End If
End Sub

I intend to use that color as Page2 background color such that any Page2 form size would have that color.

 

[teddybear]

The example works well as DonManfred said, I wonder how you set the bg color of page2? you'd better post your project.

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