B4A Library [Lib] CoverFlow v2.0

lonleystar · Mar 25, 2013

Hi guys, as I have promised, CoverFlow is here.

Download the Coverflow.zip

The zip contains the library and an example that´s all

The CoverFlow Class = Neil Davies

B4ACoverFlow
Author: Giuseppe Salvi
Version: 2

PhotoFlow
Events:
- ItemClick (Position As Int, Value As Object)
- ItemLongClick (Position As Int, Value As Object)
- ItemSelected (Position As Int, Value As Object)
Methods:
- AddImage (Dir As String, FileName As String)
  Add an image at the end of the PhotoFlow from sdcard or AssetsDir
  Example:
  PhotoFlow.AddImage(File.DirRootExternal,"a.jpg")
- AddImageAt (index As Int, Dir As String, FileName As String)
  Add an image to the desired position in the PhotoFlow from sdcard or AssetsDir
  Example:
  PhotoFlow.AddImage(1,File.DirRootExternal,"a.jpg")
- BringToFront
- ClearCache
  Delete entire disk and memory cache created before
- GetImageListFromAssets (path As String) As List
  Get entire list of images stored in assets folder
  Examples:
  Dim lv as ListView
  Dim l as list
  l.Initialize
  lv.Initialize("lv")
  Sub Menu_Click
  Activity.AddView(lv,0,0,100%x,100%y)
  l = Coverflow.GetImageListFromAssets("Here the Images path u've in assets")
  For n = 0 To l.Size-1
  lv.AddSingleLine(l.Get(n))
  next
  End Sub
- GetItem (position As Int) As String
  Returns Item
  Example:
  i.Bitmap=LoadBitmap("",PhotoFlow.GetItem(Position))
- InitializeCarousel (EventName As String)
  Initialize the Carousel
- InitializeCoverflow (EventName As String)
  Initialize the PhotoFlow
- IsInitialized As Boolean
- PopulatePhotoFlow (dir As String, path As String)
  Populate PhotoFlow from sdcard not from assets
- PopulatePhotoFlowFromAssets (path As String)
  Populate CoverFlow from assets not from sdcard
- RemoveView
- SendToBack
- SetBackgroundImage (arg0 As Bitmap)
- SetLayout (arg0 As Int, arg1 As Int, arg2 As Int, arg3 As Int)
Permissions:
- android.permission.WRITE_EXTERNAL_STORAGE
Properties:
- AnimationDuration As Int [write only]
  Sets how long the transition animation should run when a child view changes position.
- Carousel As Boolean [write only]
  Set as Carousel
- Color As Int [write only]
- CreateCache As String [write only]
  Sets the name of your own cache
  Examples:
  PhotoFlow.CreateCache = "Your cache Name Here")
  It'll create a cache in "Android/data/Your cache name/cache/.thumbs" in to SdCard
- Enabled As Boolean
- FadingEdgeLength As Int [write only]
  Set the size of the faded edge used to indicate that more content in this view is available.
- Height As Int
- ItemHeight As Int
  Get or Set ItemHeight
- ItemWidth As Int
  Get or Sets ItemWidth
- Left As Int
- Length As Int [read only]
  Returns lenght
- Reverse As Boolean [write only]
  Set reverse
- Selection As Int [write only]
  Jump directly to a specific item in the adapter data.
- ShowText As Boolean
  Get or Sets the visibility of the text - by default is hide
- Spacing As Int [write only]
  Sets the spacing between items in a Gallery
- Tag As Object
- TextColor As Int
  Get or Sets Text Color - by default is White
- TextSize As Int
  Get or Sets Text size
- Top As Int
- Version As String [read only]
  Return Author and Version of this library
- Visible As Boolean
- Width As Int

lonleystar · Apr 23, 2014

Hi Mrjoey, thx for the suggestion.

ronovar · Apr 25, 2014

Hi. Just to ask how is going progress with Vertical Flow.

Thanks.

lonleystar · Apr 25, 2014

Hi the progress is going on but I've some problem to fit images and text but I'll resolve it soon be patience.

ronovar · Apr 25, 2014

No hurry, i have just ask...i know that there is a loot of javascript cooding...so i will wait.

Do You have any good tutorial how can i write library for B4A using java code? I diassembled some apk and would like to copy code and make library for one component from this apk.I need tutorial to learn how to write library.

Thanks.

lonleystar · Apr 26, 2014

Hi, take a look to this link below.

Tutorial about development of libraries.

Mrjoey · Apr 30, 2014

hello lonelystar , i noticed that when u scroll , the image is loaded , do u mind to share some codes about doing that? i have lots of images i want to add to list , so instead of adding them directly using a loop wish becomes slow , it would fill the list and when the list is finished it will fill then the images hope u did understand my point , any suggestions are appreciated , tnx man keep forward

lonleystar · Apr 30, 2014

Hi MrJoey, I think I understand, but can U make an example in B4Android?.

Mrjoey · Apr 30, 2014

lonleystar said:
Hi MrJoey, I think I understand, but can U make an example in B4Android?.

B4X:

Sub ScrollView1_ScrollChanged(Position As Int)
'If Ind < (mapa.Size/9 )-1 Then
    If Position + ScrollView1.Height >= ScrollView1.Panel.Height Then
    If DateTime.Now > lastAddItemsTime + 1 Then
      lastAddItemsTime = DateTime.Now
    CallSub(Me,"ReadAudios")
    End If
  End If
'End If 
End Sub

this code loads additional items when the scrollview reaches a specific number of items so lets say there is 20 panels added to this scrollview and instead of making a loop to fill that 20 panels once , it add let say 10 and then when the user scrolls down it will add the other 10 , that way is very efficient and public , i think u are using this method in kind of ways , i would like u to share an idea of urs to display images instead , tnx

lonleystar · Apr 30, 2014

Hi Mrjoey, It's based on true Gallery and not on ScrollView if U mean this.

U can not do that because it fill up an Array, but I'll tray it.

ronovar · May 7, 2014

Hi, i im playing with this excellent library and would like to ask if is possible to get images direct from httputils2 using Job.GetBitmap.

I would like to fill coverflow with images from my url link of my server, not to save it to device.

So i have sucessfully used this:

B4X:

CoverFlow1.SetBackgroundImage(Job.GetBitmap)

but this sets last image retrieved from server, witch is what i expected.

So i need the code if is possible to add image to CoverFlow instead of saving it to device.

For example:

CoverFlow1.AddImageFromUrl(Job.GetBitmap)

lonleystar · May 7, 2014

HI ronovar, yes I'm working on it.

It'll be soon updated like B4AGallery + (AddImageFromUrl , AddImageFromUrlAt , PopulatePhotoFlowFromUrl)

ronovar · May 7, 2014

Ok...thanks... It will be great to have this feautures in library.

Mrjoey · May 21, 2014

hey , 1 suggestion for next update , im using B4Agallery , and there is a function called setarraylist , can u include it in coverflow? thank u

lonleystar · May 21, 2014

Hi Mrjoey, this week B4ACoverFlow and B4AGridView both will be updated as the B4AGallery I haven't forgotten.

Just now I finished fixing ICOSWorldForecastFree.

Mrjoey · May 21, 2014

aha appreciate ur hardwork , take ur time man , so this update will coverflow includes setarraylist or the next update u mean?

lonleystar · May 21, 2014

Hi, this update.

Mrjoey · May 21, 2014

wow , thank u so much man

ronovar · May 25, 2014

Hi, sorry to bother you...can you post progress on VerticaFlow.

Many Thanks.

aignatd · May 25, 2014

Can coverflow changes automatically within a certain time period ?

lonleystar · May 25, 2014

Hi ronovar, u r right i suspend it because i still find the problem to fit together the text and the images but dont be worry i'll finish it soon promise.

B4A Library [Lib] CoverFlow v2.0

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