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/Images/PNG/PNG Test/PNG Test with Options
Required plugins for this example: MBS Images Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Images/PNG/PNG Test/PNG Test with Options
This example is the version from Sun, 10th Dec 2016.
Project "PNG Test with Options.xojo_binary_project"
FileTypes
Filetype image/png
End FileTypes
Class Window1 Inherits Window
Control Canvas1 Inherits Canvas
ControlInstance Canvas1 Inherits Canvas
End Control
Control Canvas2 Inherits Canvas
ControlInstance Canvas2 Inherits Canvas
End Control
Control PushButton1 Inherits PushButton
ControlInstance PushButton1 Inherits PushButton
EventHandler Sub Action()
Dim p As Picture
Dim f As FolderItem
Dim s As String
Dim success As Boolean
s = "test.png"
// Comp the two images together for the hell of it
p = new Picture(Canvas1.Backdrop.Width, Canvas1.Backdrop.Height, 32)
p.Graphics.DrawPicture (Canvas1.Backdrop, 0, 0, p.Width, p.Height)
p.Graphics.DrawPicture (Canvas2.Backdrop, 0, 0, p.Width, p.Height)
// Draw in a cheap mask for testing
if CheckBox1.Value then
s = "test with mask.png"
p.Mask.Graphics.ForeColor = &cFFFFFF
p.Mask.Graphics.FillRect ( 0, 0, p.Width, p.Height )
p.Mask.Graphics.ForeColor = &c000000
p.Mask.Graphics.FillOval ( 0, 0, p.Width, p.Height )
end if
// Save it
f = GetSaveFolderItem( "image/png", s )
if f <> Nil then
success = f.SaveAsPNGMBS(p, 0.0, CheckBox2.Value, PopupMenu1.RowTag(PopupMenu1.ListIndex))
if NOT success then
MsgBox "Save Failed!"
end if
end if
End EventHandler
End Control
Control CheckBox1 Inherits CheckBox
ControlInstance CheckBox1 Inherits CheckBox
End Control
Control PushButton2 Inherits PushButton
ControlInstance PushButton2 Inherits PushButton
EventHandler Sub Action()
test
End EventHandler
End Control
Control CheckBox2 Inherits CheckBox
ControlInstance CheckBox2 Inherits CheckBox
End Control
Control PopupMenu1 Inherits PopupMenu
ControlInstance PopupMenu1 Inherits PopupMenu
EventHandler Sub Open()
const PNG_NO_FILTERS=0
const PNG_FILTER_NONE=8
const PNG_FILTER_SUB=16
const PNG_FILTER_UP=32
const PNG_FILTER_AVG=64
const PNG_FILTER_PAETH=128
me.DeleteAllRows
me.AddRow "No filters"
me.RowTag(0)=PNG_NO_FILTERS
me.AddRow "Filter: None"
me.RowTag(1)=PNG_FILTER_NONE
me.AddRow "Filter: Sub"
me.RowTag(2)=PNG_FILTER_SUB
me.AddRow "Filter: Up"
me.RowTag(3)=PNG_FILTER_UP
me.AddRow "Filter: Average"
me.RowTag(4)=PNG_FILTER_AVG
me.AddRow "Filter: Paeth"
me.RowTag(5)=PNG_FILTER_PAETH
me.AddRow "Filter: All"
me.RowTag(6)=PNG_FILTER_NONE + PNG_FILTER_SUB + PNG_FILTER_UP + PNG_FILTER_AVG + PNG_FILTER_PAETH
me.ListIndex=0
End EventHandler
End Control
EventHandler Sub Open()
dim f as FolderItem
dim p as PNGPictureMBS
f=FindFile("arches.png")
p=f.OpenAsPNGMBS(0)
if p<>nil then
Canvas1.Backdrop = p.CombinePictureWithMask
end if
f=FindFile("radio.png")
p=f.OpenAsPNGMBS(0)
if p<>Nil then
Canvas2.Backdrop = p.CombinePictureWithMask
end if
End EventHandler
Function FindFile(name as string) As FolderItem
// Look for file in parent folders from executable on
dim parent as FolderItem = app.ExecutableFile.Parent
while parent<>Nil
dim file as FolderItem = parent.Child(name)
if file<>Nil and file.Exists then
Return file
end if
parent = parent.Parent
wend
End Function
Protected Sub test()
dim s1,s2 as string
s1=PictureToPNGStringMBS(Canvas1.Backdrop,0, CheckBox2.Value, PopupMenu1.RowTag(PopupMenu1.ListIndex))
s2=PictureToPNGStringMBS(Canvas2.Backdrop,0, CheckBox2.Value, PopupMenu1.RowTag(PopupMenu1.ListIndex))
MsgBox str(lenb(s1))+" bytes for left image and "+str(lenb(s2))+" bytes for right image."
Canvas1.Backdrop=nil
Canvas2.Backdrop=nil
Canvas2.Backdrop=PNGStringToPictureMBS(s1,0)
Canvas1.Backdrop=PNGStringToPictureMBS(s2,0)
End Sub
End Class
MenuBar MenuBar1
MenuItem UntitledMenu1 = ""
MenuItem FileMenu = "&File"
MenuItem FileQuit = "Quit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "Undo"
MenuItem UntitledMenu0 = "-"
MenuItem EditCut = "Cut"
MenuItem EditCopy = "Copy"
MenuItem EditPaste = "Paste"
MenuItem EditClear = "Clear"
End MenuBar
Class App Inherits Application
End Class
End Project
See also:
The items on this page are in the following plugins: MBS Images Plugin.
