Extract logic to view model

Author: hieuwu

canvas/src/main/java/dev/arkbuilders/canvas/presentation/drawing/EditManager.kt

@@ -744,6 +744,23 @@ class EditManager {
         _isResizeMode.value = !isResizeMode.value
     }
 
+    fun enterResizeMode() {
+        if (!isEligibleForResizeMode())
+            return
+        toggleResizeMode()
+        if (isResizeMode.value) {
+            setBackgroundImage2()
+            val imgBitmap = getEditedImage()
+            backgroundImage.value = imgBitmap
+            resizeOperation.init(
+                imgBitmap.asAndroidBitmap()
+            )
+            return
+        }
+        cancelResizeMode()
+        scaleToFit()
+    }
+
     fun cancelResizeMode() {
         backgroundImage.value = backgroundImage2.value
         editMatrix.reset()
@@ -753,6 +770,18 @@ class EditManager {
         _isBlurMode.value = !isBlurMode.value
     }
 
+    fun enterBlurMode(strokeSliderExpanded: Boolean) {
+        if (isEligibleForBlurMode() && !strokeSliderExpanded) toggleBlurMode()
+        if (isBlurMode.value) {
+            setBackgroundImage2()
+            backgroundImage.value = getEditedImage()
+            blurOperation.init()
+            return
+        }
+        blurOperation.cancel()
+        scaleToFit()
+    }
+
     fun setPaintStrokeWidth(strokeWidth: Float) {
         drawPaint.value.strokeWidth = strokeWidth
     }

canvas/src/main/java/dev/arkbuilders/canvas/presentation/edit/EditScreen.kt

@@ -50,7 +50,6 @@ import androidx.compose.ui.ExperimentalComposeUiApi
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.graphics.asAndroidBitmap
 import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.input.pointer.pointerInteropFilter
 import androidx.compose.ui.layout.onSizeChanged
@@ -570,14 +569,7 @@ private fun EditMenuContent(
                             viewModel.strokeSliderExpanded = !viewModel.strokeSliderExpanded
                     },
                 imageVector = ImageVector.vectorResource(R.drawable.ic_line_weight),
-                tint = if (
-                    !editManager.isRotateMode.value &&
-                    !editManager.isResizeMode.value &&
-                    !editManager.isCropMode.value &&
-                    !editManager.isEyeDropperMode.value &&
-                    !editManager.isBlurMode.value
-                ) editManager.paintColor.value
-                else Color.Black,
+                tint = if (editManager.isEligibleForUndoOrRedo()) editManager.paintColor.value else Color.Black,
                 contentDescription = null
             )
             Icon(
@@ -674,24 +666,8 @@ private fun EditMenuContent(
                     .size(40.dp)
                     .clip(CircleShape)
                     .clickable {
-                        editManager.apply {
-                            if (isEligibleForResizeMode()
-                            )
-                                toggleResizeMode()
-                            else return@clickable
-                            viewModel.menusVisible = !isResizeMode.value
-                            if (isResizeMode.value) {
-                                setBackgroundImage2()
-                                val imgBitmap = viewModel.getEditedImage()
-                                backgroundImage.value = imgBitmap
-                                resizeOperation.init(
-                                    imgBitmap.asAndroidBitmap()
-                                )
-                                return@clickable
-                            }
-                            cancelResizeMode()
-                            scaleToFit()
-                        }
+                        editManager.enterResizeMode()
+                        viewModel.menusVisible = !editManager.isResizeMode.value
                     },
                 imageVector = ImageVector
                     .vectorResource(R.drawable.ic_aspect_ratio),
@@ -707,19 +683,7 @@ private fun EditMenuContent(
                     .size(40.dp)
                     .clip(CircleShape)
                     .clickable {
-                        editManager.apply {
-                            if (isEligibleForBlurMode() &&
-                                !viewModel.strokeSliderExpanded
-                            ) toggleBlurMode()
-                            if (isBlurMode.value) {
-                                setBackgroundImage2()
-                                backgroundImage.value = viewModel.getEditedImage()
-                                blurOperation.init()
-                                return@clickable
-                            }
-                            blurOperation.cancel()
-                            scaleToFit()
-                        }
+                        editManager.enterBlurMode(viewModel.strokeSliderExpanded)
                     },
                 imageVector = ImageVector
                     .vectorResource(R.drawable.ic_blur_on),
@@ -731,9 +695,7 @@ private fun EditMenuContent(
             )
         }
     }
-    viewModel.bottomButtonsScrollIsAtStart.value = scrollState.value == 0
-    viewModel.bottomButtonsScrollIsAtEnd.value =
-        scrollState.value == scrollState.maxValue
+    viewModel.onBottomButtonStateChange(scrollState.value, 0, scrollState.maxValue)
 }
 
 @Composable

canvas/src/main/java/dev/arkbuilders/canvas/presentation/edit/EditViewModel.kt

@@ -66,6 +66,11 @@ class EditViewModel(
     private val _usedColors = mutableListOf<Color>()
     val usedColors: List<Color> = _usedColors
 
+    fun onBottomButtonStateChange(scrollStateValue: Int, minStateValue: Int = 0, maxStateValue: Int) {
+        bottomButtonsScrollIsAtStart.value = scrollStateValue == minStateValue
+        bottomButtonsScrollIsAtEnd.value = scrollStateValue == maxStateValue
+    }
+
     private fun loadResource(path: Path) {
         viewModelScope.launch {
             if (path.name.endsWith(".png")) {