From 1b3fd1e50827fea107bc92f76dfd51a3535bdbc0 Mon Sep 17 00:00:00 2001
From: Treeki <treeki@gmail.com>
Date: Mon, 14 Nov 2011 00:13:47 +0100
Subject: added object resizing

---
 src/editorui.py | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)

(limited to 'src')

diff --git a/src/editorui.py b/src/editorui.py
index 1d468c6..e89810c 100644
--- a/src/editorui.py
+++ b/src/editorui.py
@@ -54,6 +54,10 @@ class KPEditorObject(KPEditorItem):
 		self._updatePosition()
 		self._updateSize()
 
+		self.setAcceptHoverEvents(True)
+
+		self.resizing = None
+
 		# I don't bother setting the ZValue because it doesn't quite matter:
 		# only one layer's objects are ever clickable, and drawBackground takes
 		# care of the layered drawing
@@ -72,6 +76,8 @@ class KPEditorObject(KPEditorItem):
 
 		self._boundingRect = QtCore.QRectF(0, 0, w*24, h*24)
 		self._selectionRect = QtCore.QRectF(0, 0, w*24-1, h*24-1)
+
+		self._resizerEndXY = (w*24-5, h*24-5)
 	
 
 	def paint(self, painter, option, widget):
@@ -79,6 +85,147 @@ class KPEditorObject(KPEditorItem):
 			painter.setPen(QtGui.QPen(Qt.white, 1, Qt.DotLine))
 			painter.drawRect(self._selectionRect)
 	
+
+	RESIZER_TOP_LEFT = 1
+	RESIZER_TOP_RIGHT = 2
+	RESIZER_BOTTOM_LEFT = 3
+	RESIZER_BOTTOM_RIGHT = 4
+	RESIZER_TOP = 5
+	RESIZER_BOTTOM = 6
+	RESIZER_LEFT = 7
+	RESIZER_RIGHT = 8
+
+	def resizerPortionAt(self, x, y):
+		rightBound, bottomBound = self._resizerEndXY
+
+		if y < 5:
+			if x < 5:				return 1 # TOP_LEFT
+			elif x >= rightBound:	return 2 # TOP_RIGHT
+			else:					return 5 # TOP
+
+		elif y >= bottomBound:
+			if x < 5:				return 3 # BOTTOM_LEFT
+			elif x >= rightBound:	return 4 # BOTTOM_RIGHT
+			else:					return 6 # BOTTOM
+
+		else:
+			if x < 5:				return 7 # LEFT
+			elif x >= rightBound:	return 8 # RIGHT
+			else:					return None
+	
+
+	def hoverMoveEvent(self, event):
+		pos = event.pos()
+		bit = self.resizerPortionAt(pos.x(), pos.y())
+
+		if bit == 1 or bit == 4:
+			self.setCursor(Qt.SizeFDiagCursor)
+		elif bit == 2 or bit == 3:
+			self.setCursor(Qt.SizeBDiagCursor)
+		elif bit == 7 or bit == 8:
+			self.setCursor(Qt.SizeHorCursor)
+		elif bit == 5 or bit == 6:
+			self.setCursor(Qt.SizeVerCursor)
+		else:
+			self.setCursor(Qt.ArrowCursor)
+	
+
+	def mousePressEvent(self, event):
+		if event.button() == Qt.LeftButton:
+			pos = event.pos()
+			bit = self.resizerPortionAt(pos.x(), pos.y())
+
+			if bit:
+				event.accept()
+
+				x, xSide, y, ySide = False, None, False, None
+				
+				if bit == 1 or bit == 7 or bit == 3:
+					x, xSide = True, 1
+				elif bit == 2 or bit == 4 or bit == 8:
+					x, xSide = True, 0
+
+				if bit == 1 or bit == 2 or bit == 5:
+					y, ySide = True, 1
+				elif bit == 3 or bit == 4 or bit == 6:
+					y, ySide = True, 0
+
+				self.resizing = (x, xSide, y, ySide)
+				return
+
+		KPEditorItem.mousePressEvent(self, event)
+	
+
+	def _tryAndResize(self, obj, axisIndex, mousePosition, stationarySide):
+		objPosition = obj.position[axisIndex]
+		objSize = obj.size[axisIndex]
+
+
+		if stationarySide == 0:
+			# Resize the right/bottom side
+			relativeMousePosition = mousePosition - objPosition
+			newSize = relativeMousePosition + 1
+			if newSize == objSize or newSize < 1:
+				return False
+
+			if axisIndex == 1:
+				obj.size = (obj.size[0], newSize)
+			else:
+				obj.size = (newSize, obj.size[1])
+
+		else:
+			# Resize the left/top side
+			rightSide = objPosition + objSize - 1
+			newLeftSide = mousePosition
+
+			newPosition = newLeftSide
+			newSize = rightSide - newLeftSide + 1
+
+			if newSize < 1:
+				return False
+			if newPosition == objPosition and newSize == objSize:
+				return False
+
+			if axisIndex == 1:
+				obj.position = (obj.position[0], newPosition)
+				obj.size = (obj.size[0], newSize)
+			else:
+				obj.position = (newPosition, obj.position[1])
+				obj.size = (newSize, obj.size[1])
+
+		return True
+
+
+	def mouseMoveEvent(self, event):
+		if self.resizing:
+			obj = self._objRef()
+			scenePos = event.scenePos()
+
+			hasChanged = False
+			resizeX, xSide, resizeY, ySide = self.resizing
+
+			if resizeX:
+				hasChanged |= self._tryAndResize(obj, 0, int(scenePos.x() / 24), xSide)
+			if resizeY:
+				hasChanged |= self._tryAndResize(obj, 1, int(scenePos.y() / 24), ySide)
+
+			if hasChanged:
+				obj.updateCache()
+				self._layerRef().updateCache()
+				self._updatePosition()
+				self._updateSize()
+
+		else:
+			KPEditorItem.mouseMoveEvent(self, event)
+	
+
+	def mouseReleaseEvent(self, event):
+		if self.resizing and event.button() == Qt.LeftButton:
+			self.resizing = None
+		else:
+			KPEditorItem.mouseReleaseEvent(self, event)
+	
+
 	def _itemMoved(self, oldX, oldY, newX, newY):
 		obj = self._objRef()
 		obj.position = (newX/24, newY/24)
-- 
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