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comparison android/DWindows.kt @ 2727:bf585f375286

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Android: Initial print implementation for Android.... Currently crashes shortly after displaying printer selection dialog. Fixes coming but I wanted to get the bulk of it committed.
author bsmith@81767d24-ef19-dc11-ae90-00e081727c95
date Sat, 11 Dec 2021 14:14:26 +0000
parents cacde852e2db
children 34e34d5d56e8
comparison
equal deleted inserted replaced
2726:7a15401e73f4 2727:bf585f375286
65 import android.util.Base64 65 import android.util.Base64
66 import kotlin.math.* 66 import kotlin.math.*
67 import android.content.ContentUris 67 import android.content.ContentUris
68 import androidx.appcompat.widget.AppCompatSeekBar 68 import androidx.appcompat.widget.AppCompatSeekBar
69 import android.content.DialogInterface 69 import android.content.DialogInterface
70 70 import android.graphics.pdf.PdfDocument
71 71 import android.print.*
72 72 import android.print.pdf.PrintedPdfDocument
73 73
74 74
75 // Color Wheel section 75 // Color Wheel section
76 private val HUE_COLORS = intArrayOf( 76 private val HUE_COLORS = intArrayOf(
77 Color.RED, 77 Color.RED,
944 } 944 }
945 945
946 external fun eventHandlerHTMLChanged(obj1: View, message: Int, URI: String, status: Int) 946 external fun eventHandlerHTMLChanged(obj1: View, message: Int, URI: String, status: Int)
947 } 947 }
948 948
949 class DWPrintDocumentAdapter : PrintDocumentAdapter()
950 {
951 var context: Context? = null
952 var pages: Int = 0
953 var pdfDocument: PrintedPdfDocument? = null
954 var print: Long = 0
955
956 override fun onLayout(
957 oldAttributes: PrintAttributes?,
958 newAttributes: PrintAttributes,
959 cancellationSignal: CancellationSignal?,
960 callback: LayoutResultCallback,
961 extras: Bundle?
962 ) {
963 // Create a new PdfDocument with the requested page attributes
964 pdfDocument = context?.let { PrintedPdfDocument(it, newAttributes) }
965
966 // Respond to cancellation request
967 if (cancellationSignal?.isCanceled == true) {
968 callback.onLayoutCancelled()
969 return
970 }
971
972 if (pages > 0) {
973 // Return print information to print framework
974 PrintDocumentInfo.Builder("print_output.pdf")
975 .setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
976 .setPageCount(pages)
977 .build()
978 .also { info ->
979 // Content layout reflow is complete
980 callback.onLayoutFinished(info, true)
981 }
982 } else {
983 // Otherwise report an error to the print framework
984 callback.onLayoutFailed("No pages to print.")
985 }
986 }
987
988 override fun onWrite(
989 pageRanges: Array<out PageRange>,
990 destination: ParcelFileDescriptor,
991 cancellationSignal: CancellationSignal?,
992 callback: WriteResultCallback
993 ) {
994 var writtenPagesArray: Array<PdfDocument.Page> = emptyArray()
995
996 // Iterate over each page of the document,
997 // check if it's in the output range.
998 for (i in 0 until pages) {
999 pdfDocument?.startPage(i)?.also { page ->
1000
1001 // check for cancellation
1002 if (cancellationSignal?.isCanceled == true) {
1003 callback.onWriteCancelled()
1004 pdfDocument?.close()
1005 pdfDocument = null
1006 return
1007 }
1008
1009 // Draw page content for printing
1010 var bitmap = Bitmap.createBitmap(page.canvas.width, page.canvas.height, Bitmap.Config.ARGB_8888)
1011 // Actual drawing is done in the JNI C code callback to the bitmap
1012 eventHandlerPrintDraw(print, bitmap, i, page.canvas.width, page.canvas.height)
1013 // Copy from the bitmap canvas our C code drew on to the PDF page canvas
1014 val rect = Rect(0, 0, page.canvas.width, page.canvas.height)
1015 page.canvas.drawBitmap(bitmap, rect, rect, null)
1016
1017 // Rendering is complete, so page can be finalized.
1018 pdfDocument?.finishPage(page)
1019
1020 // Add the new page to the array
1021 writtenPagesArray += page
1022 }
1023 }
1024
1025 // Write PDF document to file
1026 try {
1027 pdfDocument?.writeTo(FileOutputStream(destination.fileDescriptor))
1028 } catch (e: IOException) {
1029 callback.onWriteFailed(e.toString())
1030 return
1031 } finally {
1032 pdfDocument?.close()
1033 pdfDocument = null
1034 }
1035 // Signal the print framework the document is complete
1036 callback.onWriteFinished(pageRanges)
1037 }
1038
1039 override fun onFinish() {
1040 // Notify our C code so it can cleanup
1041 eventHandlerPrintFinish(print)
1042 super.onFinish()
1043 }
1044
1045 external fun eventHandlerPrintDraw(print: Long, bitmap: Bitmap, page: Int, width: Int, height: Int)
1046 external fun eventHandlerPrintFinish(print: Long)
1047 }
1048
949 class DWSlider 1049 class DWSlider
950 @JvmOverloads constructor(context: Context): FrameLayout(context) { 1050 @JvmOverloads constructor(context: Context): FrameLayout(context) {
951 val slider: SeekBar = SeekBar(context) 1051 val slider: SeekBar = SeekBar(context)
952 1052
953 init { 1053 init {
4654 } 4754 }
4655 } 4755 }
4656 } 4756 }
4657 } 4757 }
4658 return pixmap 4758 return pixmap
4759 }
4760
4761 fun printRun(print: Long, flags: Int, jobname: String, pages: Int, runflags: Int): PrintJob?
4762 {
4763 var retval: PrintJob? = null
4764
4765 waitOnUiThread {
4766 // Get a PrintManager instance
4767 val printManager = this.getSystemService(Context.PRINT_SERVICE) as PrintManager
4768 // Setup our print adapter
4769 val printAdapter = DWPrintDocumentAdapter()
4770 printAdapter.context = this
4771 printAdapter.pages = pages
4772 printAdapter.print = print
4773 // Start a print job, passing in a PrintDocumentAdapter implementation
4774 // to handle the generation of a print document
4775 retval = printManager.print(jobname, printAdapter, null)
4776 }
4777 return retval
4778 }
4779
4780 fun printCancel(printjob: PrintJob)
4781 {
4782 waitOnUiThread {
4783 // Get a PrintManager instance
4784 val printManager = this.getSystemService(Context.PRINT_SERVICE) as PrintManager
4785 // Remove the job we earlier added from the queue
4786 printManager.printJobs.remove(printjob)
4787 }
4659 } 4788 }
4660 4789
4661 fun pixmapGetDimensions(pixmap: Bitmap): Long 4790 fun pixmapGetDimensions(pixmap: Bitmap): Long
4662 { 4791 {
4663 var dimensions: Long = 0 4792 var dimensions: Long = 0