Merge pull request #45 from dinaraparanid/master

Crop with overlay ratio does not scale to full borders

Author: SmartToolFactory

cropper/src/main/java/com/smarttoolfactory/cropper/CropModifier.kt

@@ -77,7 +77,6 @@ fun Modifier.crop(
                     }
                 },
                 onGesture = { centroid, pan, zoom, rotate, mainPointer, pointerList ->
-
                     coroutineScope.launch {
                         cropState.onGesture(
                             centroid = centroid,

cropper/src/main/java/com/smarttoolfactory/cropper/state/CropStateImpl.kt

@@ -17,6 +17,8 @@ import com.smarttoolfactory.cropper.model.AspectRatio
 import com.smarttoolfactory.cropper.model.CropData
 import com.smarttoolfactory.cropper.settings.CropProperties
 
+internal const val MIN_OVERLAY_RATIO = 0.5F
+
 val CropState.cropData: CropData
     get() = CropData(
         zoom = animatableZoom.targetValue,
@@ -293,8 +295,7 @@ abstract class CropState internal constructor(
         animate: Boolean,
         animationSpec: AnimationSpec<Float> = tween(400)
     ) {
-
-        val zoom = zoom.coerceAtLeast(1f)
+        val zoom = zoom.coerceAtLeast(MIN_OVERLAY_RATIO)
 
         // Calculate new pan based on overlay
         val newDrawAreaRect = calculateValidImageDrawRect(overlayRect, drawAreaRect)

cropper/src/main/java/com/smarttoolfactory/cropper/state/TransformState.kt

@@ -16,6 +16,8 @@ import androidx.compose.ui.unit.IntSize
 import kotlinx.coroutines.coroutineScope
 import kotlinx.coroutines.launch
 
+private const val MAX_ZOOM = 10F
+
 /**
  * State of the pan, zoom and rotation. Allows to change zoom, pan via [Animatable]
  * objects' [Animatable.animateTo], [Animatable.snapTo].
@@ -37,8 +39,8 @@ open class TransformState(
     val drawAreaSize: IntSize,
     initialZoom: Float = 1f,
     initialRotation: Float = 0f,
-    minZoom: Float = 1f,
-    maxZoom: Float = 10f,
+    minZoom: Float = MIN_OVERLAY_RATIO,
+    maxZoom: Float = MAX_ZOOM,
     internal var zoomable: Boolean = true,
     internal var pannable: Boolean = true,
     internal var rotatable: Boolean = true,
@@ -55,7 +57,7 @@ open class TransformState(
         )
     )
 
-    internal val zoomMin = minZoom.coerceAtLeast(1f)
+    internal val zoomMin = minZoom.coerceAtLeast(MIN_OVERLAY_RATIO)
     internal var zoomMax = maxZoom.coerceAtLeast(1f)
     private val zoomInitial = initialZoom.coerceIn(zoomMin, zoomMax)
     private val rotationInitial = initialRotation % 360