Platforms to show: All Mac Windows Linux Cross-Platform
Required plugins for this example: MBS Picture Plugin, MBS MacCG Plugin, MBS DynaPDF Plugin, MBS MacCF Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /DynaPDF/Raster/PDF Diff
This example is the version from Thu, 31th Jul 2019.
Project "PDF Diff.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
EventHandler Sub NewDocument()
dim file as FolderItem = GetOpenFolderItem(FileTypes1.Pdf)
if file<>nil then
OpenDocument file
end if
End EventHandler
EventHandler Sub OpenDocument(item As FolderItem)
// requires MBS MacCG plugin
#if TargetMacOS then
dim pdf as CGPDFDocumentMBS = item.OpenAsCGPDFDocumentMBS
if pdf<>Nil then
dim w as new PDFWindow
w.pdf = pdf
w.file = item
w.init
w.show
else
MsgBox "Not a PDF file?"+EndOfLine+EndOfLine+item.NativePath
end if
#endif
End EventHandler
End Class
Class PDFWindow Inherits Window
Control LeftCanvas Inherits Canvas
ControlInstance LeftCanvas Inherits Canvas
End Control
Control MiddleCanvas Inherits Canvas
ControlInstance MiddleCanvas Inherits Canvas
End Control
Control RightCanvas Inherits Canvas
ControlInstance RightCanvas Inherits Canvas
End Control
Control StaticText1 Inherits Label
ControlInstance StaticText1 Inherits Label
End Control
Control StaticText2 Inherits Label
ControlInstance StaticText2 Inherits Label
End Control
Control StaticText3 Inherits Label
ControlInstance StaticText3 Inherits Label
End Control
EventHandler Function KeyDown(Key As String) As Boolean
// Use cursor up and down to move over pages
if asc(key)=31 then
if PageIndex<PageCount then
PageIndex = PageIndex + 1
render
Return true
end if
end if
if asc(key)=30 then
if PageIndex>1 then
PageIndex = PageIndex - 1
render
Return true
end if
end if
End EventHandler
Sub init()
PageIndex = 1
PageCount = pdf.PageCount
dpdf = new MyDynaPDFMBS
call dpdf.CreateNewPDF(nil)
call dpdf.OpenImportFile(file, 0, "")
call dpdf.ImportPDFFile(1,1.0,1.0)
render
End Sub
Sub render()
dim w,h as integer
dim r as CGRectMBS = pdf.MediaBox(PageIndex)
w = r.Width
h = r.Height
dim pic as new Picture(w,h,32)
if r<>Nil then
pic.Graphics.DrawCGPDFDocumentMBS(pdf, r, PageIndex)
end if
LeftCanvas.Backdrop = pic
dim dpic as Picture = dpdf.RenderPagePicture(pageindex, w, h, dpdf.kpsFitBest)
RightCanvas.Backdrop = dpic
MiddleCanvas.Backdrop = DiffPicturesMBS(pic, dpic, false)
End Sub
Property PageCount As Integer
Property PageIndex As Integer
Property dpdf As MyDynaPDFMBS
Property file As FolderItem
Property pdf As CGPDFDocumentMBS
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&File"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "Select &All"
End MenuBar
FileTypes1
Filetype application/pdf
End FileTypes1
Class MyDynaPDFMBS Inherits DynaPDFMBS
EventHandler Function Error(ErrorCode as integer, ErrorMessage as string, ErrorType as integer) As integer
// output all messages on the console:
System.DebugLog str(ErrorCode)+": "+ErrorMessage
// and display dialog:
Dim d as New MessageDialog //declare the MessageDialog object
Dim b as MessageDialogButton //for handling the result
d.icon=MessageDialog.GraphicCaution //display warning icon
d.ActionButton.Caption="Continue"
d.CancelButton.Visible=True //show the Cancel button
// a warning or an error?
if BitAnd(ErrorType, me.kE_WARNING) = me.kE_WARNING then
// if user decided to ignore, we'll ignore
if IgnoreWarnings then Return 0
d.Message="A warning occurred while processing your PDF code."
// we add a third button to display all warnings
d.AlternateActionButton.Caption = "Ignore warnings"
d.AlternateActionButton.Visible = true
else
d.Message="An error occurred while processing your PDF code."
end if
d.Explanation = str(ErrorCode)+": "+ErrorMessage
b=d.ShowModal //display the dialog
Select Case b //determine which button was pressed.
Case d.ActionButton
Return 0 // ignore
Case d.AlternateActionButton
IgnoreWarnings = true
Return 0 // ignore
Case d.CancelButton
Return -1 // stop
End select
End EventHandler
Property IgnoreWarnings As Boolean
End Class
End Project
See also:
The items on this page are in the following plugins: MBS DynaPDF Plugin.
