feat: background image supports fill mode

plugins/bg/build.gradle.kts

@@ -3,7 +3,7 @@ plugins {
 }
 
 
-project.version = "0.0.5"
+project.version = "0.0.6"
 
 
 

plugins/bg/src/main/kotlin/app/termora/plugins/bg/Appearance.kt

@@ -18,4 +18,8 @@ object Appearance {
         set(value) {
             enableManager.setFlag("Plugins.bg.interval", value)
         }
+
+    var fillMode: String
+        get() = enableManager.getFlag("Plugins.bg.fillMode", FillMode.STRETCH.name)
+        set(value) = enableManager.setFlag("Plugins.bg.fillMode", value)
 }

plugins/bg/src/main/kotlin/app/termora/plugins/bg/BGGlassPaneExtension.kt

@@ -2,6 +2,8 @@ package app.termora.plugins.bg
 
 import app.termora.GlassPaneExtension
 import app.termora.WindowScope
+import app.termora.restore
+import app.termora.save
 import com.formdev.flatlaf.FlatLaf
 import java.awt.AlphaComposite
 import java.awt.Graphics2D
@@ -12,15 +14,52 @@ class BGGlassPaneExtension private constructor() : GlassPaneExtension {
         val instance = BGGlassPaneExtension()
     }
 
+
     override fun paint(scope: WindowScope, c: JComponent, g2d: Graphics2D) {
 
         val img = BackgroundManager.getInstance().getBackgroundImage() ?: return
+        g2d.save()
         g2d.composite = AlphaComposite.getInstance(
             AlphaComposite.SRC_OVER,
             if (FlatLaf.isLafDark()) 0.2f else 0.1f
         )
-        g2d.drawImage(img, 0, 0, c.width, c.height, null)
+        
-        g2d.composite = AlphaComposite.getInstance(AlphaComposite.SRC_OVER)
+        when (Appearance.fillMode) {
+            FillMode.STRETCH.name -> {
+                g2d.drawImage(img, 0, 0, c.width, c.height, null)
+            }
+
+            FillMode.CENTER.name -> {
+                val x = (c.width - img.width) / 2
+                val y = (c.height - img.height) / 2
+                g2d.drawImage(img, x, y, null)
+            }
+
+            FillMode.TILE.name -> {
+                val iw = img.width
+                val ih = img.height
+                var y = 0
+                while (y < c.height) {
+                    var x = 0
+                    while (x < c.width) {
+                        g2d.drawImage(img, x, y, null)
+                        x += iw
+                    }
+                    y += ih
+                }
+            }
+
+            FillMode.FIT.name -> {
+                val scale = maxOf(c.width.toDouble() / img.width, c.height.toDouble() / img.height)
+                val newW = (img.width * scale).toInt()
+                val newH = (img.height * scale).toInt()
+                val x = (c.width - newW) / 2
+                val y = (c.height - newH) / 2
+                g2d.drawImage(img, x, y, newW, newH, null)
+            }
+        }
+
+        g2d.restore()
 
     }
 }

plugins/bg/src/main/kotlin/app/termora/plugins/bg/BackgroundOption.kt

@@ -10,6 +10,8 @@ import org.apache.commons.lang3.StringUtils
 import org.apache.commons.lang3.exception.ExceptionUtils
 import org.slf4j.LoggerFactory
 import java.awt.BorderLayout
+import java.awt.Component
+import java.awt.event.ItemEvent
 import java.io.File
 import java.nio.file.StandardCopyOption
 import javax.swing.*
@@ -23,6 +25,7 @@ class BackgroundOption : JPanel(BorderLayout()), OptionsPane.PluginOption {
     private val owner get() = SwingUtilities.getWindowAncestor(this)
 
     val backgroundImageTextField = OutlineTextField()
+    val fillModeComboBox = OutlineComboBox<FillMode>()
     val intervalSpinner = NumberSpinner(360, minimum = 30, maximum = 86400)
 
     private val backgroundButton = JButton(Icons.folder)
@@ -36,6 +39,38 @@ class BackgroundOption : JPanel(BorderLayout()), OptionsPane.PluginOption {
 
     private fun initView() {
 
+        fillModeComboBox.addItem(FillMode.STRETCH)
+        fillModeComboBox.addItem(FillMode.FIT)
+        fillModeComboBox.addItem(FillMode.CENTER)
+        fillModeComboBox.addItem(FillMode.TILE)
+
+        fillModeComboBox.selectedItem = runCatching { FillMode.valueOf(Appearance.fillMode) }
+            .getOrNull() ?: FillMode.STRETCH
+
+        fillModeComboBox.renderer = object : DefaultListCellRenderer() {
+            override fun getListCellRendererComponent(
+                list: JList<*>?,
+                value: Any?,
+                index: Int,
+                isSelected: Boolean,
+                cellHasFocus: Boolean
+            ): Component? {
+                var text = value?.toString()
+
+                if (value == FillMode.STRETCH) {
+                    text = BGI18n.getString("termora.plugins.bg.fill-mode.stretch")
+                } else if (value == FillMode.FIT) {
+                    text = BGI18n.getString("termora.plugins.bg.fill-mode.fit")
+                } else if (value == FillMode.CENTER) {
+                    text = BGI18n.getString("termora.plugins.bg.fill-mode.center")
+                } else if (value == FillMode.TILE) {
+                    text = BGI18n.getString("termora.plugins.bg.fill-mode.tile")
+                }
+
+                return super.getListCellRendererComponent(list, text, index, isSelected, cellHasFocus)
+            }
+        }
+
         backgroundImageTextField.isEditable = false
         backgroundImageTextField.trailingComponent = backgroundButton
         backgroundImageTextField.text = Appearance.backgroundImage
@@ -80,6 +115,15 @@ class BackgroundOption : JPanel(BorderLayout()), OptionsPane.PluginOption {
                 Appearance.interval = value
             }
         }
+
+        fillModeComboBox.addItemListener {
+            if (it.stateChange == ItemEvent.SELECTED) {
+                Appearance.fillMode = fillModeComboBox.selectedItem?.toString() ?: FillMode.STRETCH.name
+                for (frame in TermoraFrameManager.getInstance().getWindows()) {
+                    SwingUtilities.invokeLater { SwingUtilities.updateComponentTreeUI(frame) }
+                }
+            }
+        }
     }
 
     private fun onSelectedBackgroundImage(file: File) {
@@ -124,7 +168,7 @@ class BackgroundOption : JPanel(BorderLayout()), OptionsPane.PluginOption {
     private fun getFormPanel(): JPanel {
         val layout = FormLayout(
             "left:pref, $FORM_MARGIN, default:grow, $FORM_MARGIN, default",
-            "pref, $FORM_MARGIN, pref"
+            "pref, $FORM_MARGIN, pref, $FORM_MARGIN, pref"
         )
 
         var rows = 1
@@ -138,6 +182,10 @@ class BackgroundOption : JPanel(BorderLayout()), OptionsPane.PluginOption {
             .add(bgClearBox).xy(5, rows)
             .apply { rows += step }
 
+        builder.add("${BGI18n.getString("termora.plugins.bg.fill-mode")}:").xy(1, rows)
+            .add(fillModeComboBox).xy(3, rows)
+            .apply { rows += step }
+
         builder.add("${BGI18n.getString("termora.plugins.bg.interval")}:").xy(1, rows)
             .add(intervalSpinner).xy(3, rows)
             .apply { rows += step }

plugins/bg/src/main/kotlin/app/termora/plugins/bg/FillMode.kt

@@ -0,0 +1,8 @@
+package app.termora.plugins.bg
+
+enum class FillMode {
+    STRETCH,       // 拉伸
+    FIT,           // 等比例铺满
+    CENTER,        // 居中
+    TILE,          // 平铺
+}

plugins/bg/src/main/resources/i18n/messages.properties

@@ -1,2 +1,7 @@
 termora.plugins.bg.interval=Interval
+termora.plugins.bg.fill-mode=Fill Mode
+termora.plugins.bg.fill-mode.stretch=Stretch
+termora.plugins.bg.fill-mode.fit=Fit
+termora.plugins.bg.fill-mode.center=Center
+termora.plugins.bg.fill-mode.tile=Tile
 termora.plugins.bg.background-image=Background Image

plugins/bg/src/main/resources/i18n/messages_zh_CN.properties

@@ -1,2 +1,8 @@
 termora.plugins.bg.background-image=背景图
 termora.plugins.bg.interval=切换间隔
+
+termora.plugins.bg.fill-mode=填充模式
+termora.plugins.bg.fill-mode.stretch=拉伸
+termora.plugins.bg.fill-mode.fit=适合
+termora.plugins.bg.fill-mode.center=居中
+termora.plugins.bg.fill-mode.tile=平铺

plugins/bg/src/main/resources/i18n/messages_zh_TW.properties

@@ -1,2 +1,8 @@
 termora.plugins.bg.background-image=背景圖
 termora.plugins.bg.interval=切換間隔
+
+termora.plugins.bg.fill-mode=填充模式
+termora.plugins.bg.fill-mode.stretch=拉伸
+termora.plugins.bg.fill-mode.fit=適合
+termora.plugins.bg.fill-mode.center=居中
+termora.plugins.bg.fill-mode.tile=平鋪