1 files changed, 99 insertions, 25 deletions

diff --git a/core/src/main/kotlin/ca/allanwang/kau/utils/ViewUtils.kt b/core/src/main/kotlin/ca/allanwang/kau/utils/ViewUtils.kt
index 59ae204..ead2cb7 100644
--- a/core/src/main/kotlin/ca/allanwang/kau/utils/ViewUtils.kt
+++ b/core/src/main/kotlin/ca/allanwang/kau/utils/ViewUtils.kt
@@ -5,10 +5,8 @@ package ca.allanwang.kau.utils
 import android.animation.ValueAnimator
 import android.content.Context
 import android.graphics.Color
-import android.support.annotation.ColorInt
-import android.support.annotation.ColorRes
-import android.support.annotation.StringRes
-import android.support.annotation.TransitionRes
+import android.os.Build
+import android.support.annotation.*
 import android.support.design.widget.FloatingActionButton
 import android.support.design.widget.Snackbar
 import android.support.design.widget.TextInputEditText
@@ -93,30 +91,98 @@ fun FloatingActionButton.hideIf(hide: Boolean) = if (hide) hide() else show()
 /**
  * Set left margin to a value in px
  */
-@KauUtils fun View.updateLeftMargin(margin: Int) = updateMargins(margin, KAU_LEFT)
+@KauUtils fun View.setMarginLeft(margin: Int) = setMargins(margin, KAU_LEFT)
 
 /**
  * Set top margin to a value in px
  */
-@KauUtils fun View.updateTopMargin(margin: Int) = updateMargins(margin, KAU_TOP)
+@KauUtils fun View.setMarginTop(margin: Int) = setMargins(margin, KAU_TOP)
 
 /**
  * Set right margin to a value in px
  */
-@KauUtils fun View.updateRightMargin(margin: Int) = updateMargins(margin, KAU_RIGHT)
+@KauUtils fun View.setMarginRight(margin: Int) = setMargins(margin, KAU_RIGHT)
 
 /**
  * Set bottom margin to a value in px
  */
-@KauUtils fun View.updateBottomMargin(margin: Int) = updateMargins(margin, KAU_BOTTOM)
+@KauUtils fun View.setMarginBottom(margin: Int) = setMargins(margin, KAU_BOTTOM)
 
-@KauUtils private fun View.updateMargins(margin: Int, flag: Int) {
-    val p = (layoutParams as? ViewGroup.MarginLayoutParams) ?: return
+/**
+ * Set left and right margins to a value in px
+ */
+@KauUtils fun View.setMarginHorizontal(margin: Int) = setMargins(margin, KAU_HORIZONTAL)
+
+/**
+ * Set top and bottom margins to a value in px
+ */
+@KauUtils fun View.setMarginVertical(margin: Int) = setMargins(margin, KAU_VERTICAL)
+
+/**
+ * Set all margins to a value in px
+ */
+@KauUtils fun View.setMargin(margin: Int) = setMargins(margin, KAU_ALL)
+
+/**
+ * Base margin setter
+ * returns true if setting is successful, false otherwise
+ */
+@KauUtils private fun View.setMargins(margin: Int, flag: Int): Boolean {
+    val p = (layoutParams as? ViewGroup.MarginLayoutParams) ?: return false
     p.setMargins(
-            if (flag == KAU_LEFT) margin else p.leftMargin,
-            if (flag == KAU_TOP) margin else p.topMargin,
-            if (flag == KAU_RIGHT) margin else p.rightMargin,
-            if (flag == KAU_BOTTOM) margin else p.bottomMargin
+            if (flag and KAU_LEFT > 0) margin else p.leftMargin,
+            if (flag and KAU_TOP > 0) margin else p.topMargin,
+            if (flag and KAU_RIGHT > 0) margin else p.rightMargin,
+            if (flag and KAU_BOTTOM > 0) margin else p.bottomMargin
+    )
+    requestLayout()
+    return true
+}
+
+/**
+ * Set left padding to a value in px
+ */
+@KauUtils fun View.setPaddingLeft(padding: Int) = setPadding(padding, KAU_LEFT)
+
+/**
+ * Set top padding to a value in px
+ */
+@KauUtils fun View.setPaddingTop(padding: Int) = setPadding(padding, KAU_TOP)
+
+/**
+ * Set right padding to a value in px
+ */
+@KauUtils fun View.setPaddingRight(padding: Int) = setPadding(padding, KAU_RIGHT)
+
+/**
+ * Set bottom padding to a value in px
+ */
+@KauUtils fun View.setPaddingBottom(padding: Int) = setPadding(padding, KAU_BOTTOM)
+
+/**
+ * Set left and right padding to a value in px
+ */
+@KauUtils fun View.setPaddingHorizontal(padding: Int) = setPadding(padding, KAU_HORIZONTAL)
+
+/**
+ * Set top and bottom padding to a value in px
+ */
+@KauUtils fun View.setPaddingVertical(padding: Int) = setPadding(padding, KAU_VERTICAL)
+
+/**
+ * Set all padding to a value in px
+ */
+@KauUtils fun View.setPadding(padding: Int) = setPadding(padding, KAU_ALL)
+
+/**
+ * Base padding setter
+ */
+@KauUtils private fun View.setPadding(padding: Int, flag: Int) {
+    setPadding(
+            if (flag and KAU_LEFT > 0) padding else paddingLeft,
+            if (flag and KAU_TOP > 0) padding else paddingTop,
+            if (flag and KAU_RIGHT > 0) padding else paddingRight,
+            if (flag and KAU_BOTTOM > 0) padding else paddingBottom
     )
     requestLayout()
 }
@@ -131,18 +197,8 @@ fun FloatingActionButton.hideIf(hide: Boolean) = if (hide) hide() else show()
     (context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager).showSoftInput(this, InputMethodManager.SHOW_IMPLICIT)
 }
 
-@KauUtils fun ViewGroup.transitionAuto(builder: AutoTransition.() -> Unit = {}) {
-    val transition = AutoTransition()
-    transition.builder()
-    TransitionManager.beginDelayedTransition(this, transition)
-}
-
-@KauUtils fun ViewGroup.transitionDelayed(@TransitionRes id: Int, builder: Transition.() -> Unit = {}) {
-    val transition = TransitionInflater.from(context).inflateTransition(id)
-    transition.builder()
-    TransitionManager.beginDelayedTransition(this, transition)
-}
 
+@RequiresApi(Build.VERSION_CODES.LOLLIPOP)
 @KauUtils fun View.setRippleBackground(@ColorInt foregroundColor: Int, @ColorInt backgroundColor: Int) {
     background = createSimpleRippleDrawable(foregroundColor, backgroundColor)
 }
@@ -192,4 +248,22 @@ inline fun FloatingActionButton.transition(crossinline action: FloatingActionBut
             start()
         }
     }
+}
+
+/**
+ * Attaches a listener to the recyclerview to hide the fab when it is scrolling downwards
+ * The fab will reappear when scrolling has stopped or if the user scrolls up
+ */
+fun FloatingActionButton.hideOnDownwardsScroll(recycler: RecyclerView) {
+    recycler.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+
+        override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+            if (newState == android.support.v7.widget.RecyclerView.SCROLL_STATE_IDLE && !isShown) show();
+        }
+
+        override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
+            if (dy > 0 && isShown) hide()
+            else if (dy < 0 && isHidden) show()
+        }
+    })
 }
\ No newline at end of file