3 files changed, 213 insertions, 10 deletions
diff --git a/src/main/kotlin/pl/treksoft/kvision/core/Types.kt b/src/main/kotlin/pl/treksoft/kvision/core/Types.kt
index 9248020c..e59a5eeb 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/Types.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/Types.kt
@@ -42,4 +42,3 @@ typealias StringBoolPair = Pair<String, Boolean>
  * This type is used for defining CSS dimensions (width, heights, margins, paddings, etc.).
  */
 typealias CssSize = Pair<Number, UNIT>
-
diff --git a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
index c0e684ba..ba4db0cc 100644
--- a/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/core/Widget.kt
@@ -35,17 +35,14 @@ import pl.treksoft.kvision.i18n.I18n
 import pl.treksoft.kvision.i18n.I18n.trans
 import pl.treksoft.kvision.panel.Root
 import pl.treksoft.kvision.state.ObservableState
-import pl.treksoft.kvision.utils.SnOn
-import pl.treksoft.kvision.utils.emptyOn
-import pl.treksoft.kvision.utils.hooks
-import pl.treksoft.kvision.utils.on
-import pl.treksoft.kvision.utils.set
-import pl.treksoft.kvision.utils.snAttrs
-import pl.treksoft.kvision.utils.snClasses
-import pl.treksoft.kvision.utils.snOpt
-import pl.treksoft.kvision.utils.snStyle
+import pl.treksoft.kvision.utils.*
 import kotlin.reflect.KProperty
 
+enum class Easing(internal val easing: String) {
+    SWING("swing"),
+    LINEAR("linear")
+}
+
 /**
  * Base widget class. The parent of all component classes.
  *
@@ -439,6 +436,162 @@ open class Widget(classes: Set<String> = setOf()) : StyledComponent(), Component
     }
 
     /**
+     * Shows current widget with animation effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun showAnim(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        this.display = Display.NONE
+        this.visible = true
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.show(duration, easing.easing) {
+                this.display = null
+                complete?.invoke()
+            }
+        } else {
+            this.display = null
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
+     * Hides current widget with animation effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun hideAnim(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.hide(duration, easing.easing) {
+                this.visible = false
+                complete?.invoke()
+            }
+        } else {
+            this.visible = false
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
+     * Shows current widget with slide down effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun slideDown(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        this.display = Display.NONE
+        this.visible = true
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.slideDown(duration, easing.easing) {
+                this.display = null
+                complete?.invoke()
+            }
+        } else {
+            this.display = null
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
+     * Hides current widget with slide up effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun slideUp(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.slideUp(duration, easing.easing) {
+                this.visible = false
+                complete?.invoke()
+            }
+        } else {
+            this.visible = false
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
+     * Shows current widget with fade in effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun fadeIn(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        this.display = Display.NONE
+        this.visible = true
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.fadeIn(duration, easing.easing) {
+                this.display = null
+                complete?.invoke()
+            }
+        } else {
+            this.display = null
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
+     * Hides current widget with fade out effect.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @return current widget
+     */
+    open fun fadeOut(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null
+    ): Widget {
+        val jq = getElementJQuery()
+        if (jq != null) {
+            jq.fadeOut(duration, easing.easing) {
+                this.visible = false
+                complete?.invoke()
+            }
+        } else {
+            this.visible = false
+            complete?.invoke()
+        }
+        return this
+    }
+
+    /**
      * Enables tooltip for the current widget.
      * @param options tooltip options
      * @return current widget
@@ -755,6 +908,34 @@ open class Widget(classes: Set<String> = setOf()) : StyledComponent(), Component
     }
 
     /**
+     * Animate the widget changing CSS properties.
+     * @param duration a duration of the animation
+     * @param easing an easing function to use
+     * @param complete a callback function called after the animation completes
+     * @param styles changing properties values
+     */
+    open fun animate(
+        duration: Int = 400,
+        easing: Easing = Easing.SWING,
+        complete: (() -> Unit)? = null,
+        styles: StyledComponent.() -> Unit
+    ) {
+        val widget = Widget()
+        widget.styles()
+        val stylesList = widget.getSnStyle()
+        val obj = js("{}")
+        stylesList.forEach { (key, value) ->
+            obj[key.toCamelCase()] = value
+        }
+        @Suppress("UnsafeCastFromDynamic")
+        getElementJQuery()?.animate(obj, duration, easing.easing) {
+            widget.dispose()
+            this.styles()
+            complete?.invoke()
+        }
+    }
+
+    /**
      * @suppress
      * Internal function
      */
diff --git a/src/main/kotlin/pl/treksoft/kvision/utils/Utils.kt b/src/main/kotlin/pl/treksoft/kvision/utils/Utils.kt
index e2833630..995b0466 100644
--- a/src/main/kotlin/pl/treksoft/kvision/utils/Utils.kt
+++ b/src/main/kotlin/pl/treksoft/kvision/utils/Utils.kt
@@ -161,6 +161,20 @@ fun CssSize.asString(): String {
     }
 }
 
+/**
+ * Extension operator to increase CssSize units.
+ */
+operator fun CssSize?.plus(i: Number): CssSize {
+    return this?.let { CssSize(it.first.toDouble() + i.toDouble(), it.second) } ?: CssSize(i, UNIT.px)
+}
+
+/**
+ * Extension operator to decrease CssSize units.
+ */
+operator fun CssSize?.minus(i: Number): CssSize {
+    return this?.let { CssSize(it.first.toDouble() - i.toDouble(), it.second) } ?: CssSize(i, UNIT.px)
+}
+
 private val hex = arrayOf("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f")
 
 /**
@@ -208,3 +222,12 @@ val String?.set: Set<String>
     get() {
         return this?.split(Regex("\\s+"))?.toSet() ?: setOf()
     }
+
+/**
+ * Utility extension function to convert string from kebab-case to camelCase.
+ */
+fun String.toCamelCase(): String {
+    return this.replace(Regex("(\\-\\w)")) {
+        it.value.drop(1).toUpperCase()
+    }
+}