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draw a transparent circlular shadow at dragging an item

This commit is contained in:
tibbi 2022-09-24 22:23:42 +02:00
parent ee76ac602a
commit 1ec3112032
1 changed files with 22 additions and 0 deletions
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22
app/src/main/kotlin/com/simplemobiletools/launcher/views/HomeScreenGrid.kt
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@ -25,6 +25,7 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
private var iconMargin = context.resources.getDimension(R.dimen.icon_side_margin).toInt()
private var labelSideMargin = context.resources.getDimension(R.dimen.small_margin).toInt()
private var textPaint: TextPaint
private var dragShadowCirclePaint: Paint
private var draggedItem: HomeScreenGridItem? = null
// let's use a 6x5 grid for now with 1 special row at the bottom, prefilled with default apps
@ -45,6 +46,12 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
setShadowLayer(.5f, 0f, 0f, Color.BLACK)
}
dragShadowCirclePaint = Paint(Paint.ANTI_ALIAS_FLAG).apply {
color = context.resources.getColor(R.color.light_grey_stroke)
strokeWidth = context.resources.getDimension(R.dimen.small_margin)
style = Paint.Style.STROKE
}
fetchGridItems()
}
@ -200,6 +207,21 @@ class HomeScreenGrid(context: Context, attrs: AttributeSet, defStyle: Int) : Vie
item.drawable!!.draw(canvas)
} else if (draggedItemCurrentCoords.first != -1 && draggedItemCurrentCoords.second != -1) {
// draw a circle under the current cell
val center = gridCenters.minBy { Math.abs(it.first - draggedItemCurrentCoords.first) + Math.abs(it.second - draggedItemCurrentCoords.second) }
val gridCells = getClosestGridCells(center)
if (gridCells != null) {
val shadowX = rowXCoords[gridCells.first] + iconMargin.toFloat() + iconSize / 2
val shadowY = if (gridCells.second == ROW_COUNT - 1) {
rowYCoords[gridCells.second] + rowHeight - iconSize / 2 - iconMargin * 2
} else {
rowYCoords[gridCells.second] + iconSize
}
canvas.drawCircle(shadowX, shadowY.toFloat(), iconSize / 2f, dragShadowCirclePaint)
}
// show the icon itself at dragging
val drawableX = draggedItemCurrentCoords.first - iconSize
val drawableY = draggedItemCurrentCoords.second - (iconSize * 1.5f).toInt()
item.drawable!!.setBounds(drawableX, drawableY, drawableX + iconSize, drawableY + iconSize)