Mercurial > cgi-bin > hgweb.cgi > ImagePrep
annotate src/name/blackcap/imageprep/RotateDialog.kt @ 12:26a507e095ab
Use ImageObserver and wait if needed.
| author | David Barts <n5jrn@me.com> |
|---|---|
| date | Sat, 18 Jul 2020 12:04:05 -0700 |
| parents | 1f824742e1fa |
| children | 3feeb953d9ae |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Represents a file being edited (rotated) | |
| 3 */ | |
| 4 package name.blackcap.imageprep | |
| 5 | |
| 1 | 6 import java.awt.Dimension |
| 7 import java.awt.Graphics | |
| 0 | 8 import java.awt.Graphics2D |
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9 import java.awt.Image |
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10 import java.awt.Toolkit |
| 1 | 11 import java.awt.event.ActionListener |
| 0 | 12 import java.awt.image.BufferedImage |
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13 import java.awt.image.ImageObserver |
| 0 | 14 import java.io.File |
| 15 import java.io.IOException | |
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16 import java.util.concurrent.Semaphore |
| 3 | 17 import java.util.logging.Level |
| 18 import java.util.logging.Logger | |
| 0 | 19 import javax.imageio.ImageIO |
| 20 import javax.swing.* | |
| 21 import kotlin.math.* | |
| 22 | |
| 23 class RotateDialog(val file: File, initialImage: BufferedImage) : JDialog(Application.mainFrame) { | |
| 24 private val BW = 9 | |
| 25 private val BW2 = BW * 2 | |
| 26 | |
| 1 | 27 private class DrawingPane(initialImage: BufferedImage) : JPanel() { |
| 0 | 28 var image: BufferedImage = initialImage |
| 29 set(value) { | |
| 30 field = value | |
| 31 revalidate() | |
| 32 repaint() | |
| 33 } | |
| 34 | |
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35 override fun getPreferredSize(): Dimension { |
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36 val screen = Toolkit.getDefaultToolkit().screenSize |
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37 return Dimension(min(image.width, screen.width/4*3), |
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38 min(image.height, screen.height/4*3)) |
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39 } |
| 0 | 40 |
| 1 | 41 override protected fun paintComponent(g: Graphics): Unit { |
| 0 | 42 g.drawImage(image, 0, 0, null) |
| 43 } | |
| 44 } | |
| 1 | 45 private val drawingPane = DrawingPane(initialImage) |
| 0 | 46 |
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47 private class ImageWaiter: ImageObserver { |
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48 private var sem = Semaphore(0) |
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49 @Volatile private var flags: Int? = null |
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50 private var MASK = ImageObserver.ALLBITS or ImageObserver.ERROR or ImageObserver.ABORT |
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51 |
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52 override fun imageUpdate(img: Image, infoflags: Int, x: Int, y: Int, width: Int, height: Int): Boolean { |
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53 if (infoflags and MASK != 0) { |
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54 flags = infoflags |
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55 sem.release() |
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56 return false |
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57 } |
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58 return true |
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59 } |
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60 |
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61 fun wait(): Int { |
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62 sem.acquire() |
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63 return flags!! |
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64 } |
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65 } |
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26a507e095ab
Use ImageObserver and wait if needed.
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parents:
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66 |
| 0 | 67 val image: BufferedImage |
| 68 get() { return drawingPane.image } | |
| 69 | |
| 1 | 70 private val r90cw = JButton("90° CW").also { |
| 0 | 71 it.addActionListener(ActionListener { doRotate(90) }) |
| 72 } | |
| 73 | |
| 1 | 74 private val r180 = JButton("180°").also { |
| 0 | 75 it.addActionListener(ActionListener { doRotate(180) }) |
| 76 } | |
| 77 | |
| 1 | 78 private val r90ccw = JButton("90° CCW").also { |
| 0 | 79 it.addActionListener(ActionListener { doRotate(270) }) |
| 80 } | |
| 81 | |
| 82 /* Theoretically, this should do the rotation in a background thread. | |
| 83 Practically, that is fraught with difficulties, as it involves | |
| 84 manipulating data used by Swing itself. Since the size of the images | |
| 85 being rotated are small, we do it in the foreground. */ | |
| 86 private fun doRotate(deg: Int) { | |
| 3 | 87 rootPane.defaultButton = null |
| 0 | 88 // https://stackoverflow.com/questions/15927014/rotating-an-image-90-degrees-in-java |
| 3 | 89 if (deg % 90 != 0) { |
| 90 val barf = "${deg} not a multiple of 90!" | |
| 91 LOGGER.log(Level.SEVERE, barf) | |
| 92 throw AssertionError(barf) | |
| 93 } | |
| 0 | 94 val rad = java.lang.Math.toRadians(deg.toDouble()) |
| 3 | 95 val (w, h) = if (deg % 180 == 0) Pair(image.width, image.height) else Pair(image.height, image.width) |
| 0 | 96 val rotatedImage = BufferedImage(w, h, image.type) |
| 97 rotatedImage.createGraphics().run { | |
| 98 translate((w - image.width) / 2, (h - image.height) / 2) | |
| 1 | 99 rotate(rad, image.width.toDouble()/2.0, image.height.toDouble()/2.0) |
| 0 | 100 drawRenderedImage(image, null) |
| 101 dispose() | |
| 102 } | |
| 103 drawingPane.image = rotatedImage | |
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6
9129ae110146
Window reshapes to avoid gratuitous scrollbars (as it should).
David Barts <n5jrn@me.com>
parents:
3
diff
changeset
|
104 revalidate() |
|
9129ae110146
Window reshapes to avoid gratuitous scrollbars (as it should).
David Barts <n5jrn@me.com>
parents:
3
diff
changeset
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105 pack() |
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9129ae110146
Window reshapes to avoid gratuitous scrollbars (as it should).
David Barts <n5jrn@me.com>
parents:
3
diff
changeset
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106 repaint() |
| 0 | 107 } |
| 108 | |
| 109 init { | |
| 110 defaultCloseOperation = JDialog.DISPOSE_ON_CLOSE | |
| 111 title = "Untitled" | |
| 112 contentPane.apply { | |
| 113 layout = BoxLayout(this, BoxLayout.Y_AXIS) | |
| 1 | 114 add(JScrollPane(drawingPane).apply { |
| 0 | 115 alignmentX = JScrollPane.CENTER_ALIGNMENT |
| 116 addBorder(BorderFactory.createEmptyBorder(BW2, BW2, BW, BW2)) | |
| 117 verticalScrollBarPolicy = ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS | |
| 118 horizontalScrollBarPolicy = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS | |
| 119 background = Application.mainFrame.background | |
| 120 }) | |
| 121 add(Box(BoxLayout.X_AXIS).apply { | |
| 122 alignmentX = Box.CENTER_ALIGNMENT | |
| 123 addBorder(BorderFactory.createEmptyBorder(BW, BW2, BW2, BW2)) | |
| 124 add(JLabel("Rotate:")) | |
| 125 add(Box.createHorizontalGlue()) | |
| 126 add(r90cw) | |
| 127 add(Box.createHorizontalGlue()) | |
| 128 add(r180) | |
| 129 add(Box.createHorizontalGlue()) | |
| 130 add(r90ccw) | |
| 131 }) | |
| 132 } | |
| 3 | 133 rootPane.defaultButton = null |
| 0 | 134 pack() |
| 135 } | |
| 136 | |
| 137 companion object Factory { | |
| 138 /** | |
| 139 * Make a dialog asynchronously. | |
| 140 * | |
| 141 * @param input java.io.File to read for image. | |
| 142 */ | |
| 143 fun makeDialog(input: File): Unit { | |
| 144 Application.mainFrame.useWaitCursor() | |
| 1 | 145 swingWorker<Pair<BufferedImage?, IOException?>> { |
| 0 | 146 inBackground { |
| 147 try { | |
| 148 val imageIn = ImageIO.read(input) /* IOException */ | |
| 149 val ratio = Settings.maxDimension.toDouble() / max(imageIn.width, imageIn.height).toDouble() | |
| 150 if (ratio >= 1.0) { | |
| 1 | 151 Pair(null, null) |
| 0 | 152 } else { |
| 153 val nWidth = (imageIn.width * ratio).toInt() | |
| 154 val nHeight = (imageIn.height * ratio).toInt() | |
| 11 | 155 val imageOut = BufferedImage(nWidth, nHeight, imageIn.type) |
| 156 imageOut.createGraphics().run { | |
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157 val w = ImageWaiter() |
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158 if (!drawImage(imageIn.getScaledInstance(nWidth, nHeight, BufferedImage.SCALE_SMOOTH), 0, 0, w)) |
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159 w.wait() |
| 11 | 160 dispose() |
| 0 | 161 } |
| 162 Pair(imageOut, null) | |
| 163 } | |
| 164 } catch (e: IOException) { | |
| 165 Pair(null, e) | |
| 166 } | |
| 167 } | |
| 168 whenDone { | |
| 169 Application.mainFrame.useNormalCursor() | |
| 170 val (image, error) = get() | |
| 171 if (error != null) | |
| 172 ioExceptionDialog(Application.mainFrame, input, "read", error) | |
| 1 | 173 else if (image != null) |
| 3 | 174 RotateDialog(input, image).run { |
| 175 title = input.name | |
| 176 setVisible(true) | |
| 177 } | |
| 1 | 178 else |
| 179 JOptionPane.showMessageDialog(Application.mainFrame, | |
| 180 "Image is too small to be scaled.", | |
| 181 "Warning", JOptionPane.WARNING_MESSAGE) | |
| 0 | 182 } |
| 183 } | |
| 184 } | |
| 185 } | |
| 186 } |