From 1c17b6165c5dd7b6bb992e816d07f897c4880e11 Mon Sep 17 00:00:00 2001
From: yumoqing <yumoqing@gmail.com>
Date: Fri, 25 Nov 2022 20:31:39 +0800
Subject: [PATCH] bugfix

---
 kivyblocks/sizeposbehavior.py | 124 ++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 kivyblocks/sizeposbehavior.py

diff --git a/kivyblocks/sizeposbehavior.py b/kivyblocks/sizeposbehavior.py
new file mode 100644
index 0000000..9b52412
--- /dev/null
+++ b/kivyblocks/sizeposbehavior.py
@@ -0,0 +1,124 @@
+
+from kivy.clock import Clock
+from kivy.properties import BooleanProperty, NumericProperty
+from kivy.graphics import Color, Line
+
+class SizePosBehavior(object):
+	resizable = BooleanProperty(False)
+	movable = BooleanProperty(False)
+	border_width = NumericProperty(8)
+	def __init__(self, **kw):
+		self.trigger_task = None
+		self.act_type = None
+		self.bind(on_touch_down, self.touchdown)
+		self.bind(on_touch_move, self.touchmove)
+		self.bind(on_touch_up, self.touchup)
+		self.sp_enable = kw.get('sp_enable', False)
+		
+	@classmethod
+	def properties(self):
+		return [
+			'resizable',
+			'movable',
+			'border_width'
+		]
+
+	def enable_resize_move(self):
+		self.sp_enable = True
+
+	def disable_resize_move(self):
+		self.sp_enable = False
+
+	def identify_type(self):
+		x, y = self.start_touch_pos
+		minx, maxx = self.pos[0] + self.border_width, self.width - self.border_width
+		miny, maxy = self.pos[1] + self.border_width, self.height - self.border_width
+		self.act_type = 'resize'
+		if x >= minx and x < maxx:
+			if y >= miny and y <= maxy:
+				self.act_type = 'move'
+				return
+		if x - self.pos[0] < self.border_width:
+			self.lines.append('left')
+		if maxx - x < self.border_width:
+			self.lines.append('top')
+		if y - self.pos[1] < self.border_width:
+			self.lines.append('right')
+		if maxy - y < self.border_width:
+			self.lines.append('bottom')
+
+	def touchdown(self, o, touch):
+		if not self.collide_point(*touch.pos):
+			return
+		if not self.sp_eanble:
+			return
+		touch.grab(self)
+		self.start_touch_pos = touch.pos
+		self.start_offset = touch.pos[0] - self.pos[0], touch.pos[1] - self.pos[1]
+		self.act_type = None
+		self.lines = []
+		self.trigger_task = Clock.schedule_once(self.identify_type, 0.5)
+
+	def touchmove(self, o, touch):
+		if not self.parent.collide_point(*touch.pos):
+			return
+		if not self.sp_eanble:
+			return
+		if self.act_type is None:
+			return
+		if touch.grab_current != self:
+			return
+		if self.act_type == 'move':
+			pos = touch.pos
+			maxx = self.parent.width
+			maxy = self.parent.height
+			x = pos[0] - self.start_offset[0]
+			y = pos[1] - self.start_offset[1]
+			if x < 0:
+				x = 0
+			if x > maxx - self.width:
+				x = maxx - self.width
+			if y < 0:
+				y = 0
+			if y > maxy - self.height:
+				y = maxy - self.height
+			self.pos = x, y
+			self.pos_hint = {'x':x/maxx, 'y':y/maxy}
+			self.draw_box()
+		if self.act_type == 'resize':
+			pos = touch.pos
+			xoffset = pos[0] - self.start_touch_pos[0]
+			yoffset = pos[1] - self.start_touch_pos[1]
+			for l in self.lines:
+				if l == 'left':
+					self.width -= xoffset
+					self.x -= xoffset
+				elif l == 'top':
+					self.height -= yoffset
+					self.y -= yoffset
+				elif l == 'right':
+					self.width += xoffset
+				else:
+					self.heigth += yoffset
+
+	def touchup(self, o, touch):
+		if self.trigger_task:
+			self.trigger_task.cancel()
+		self.trigger_task = None
+		if touch.grab_current is self:
+			touch.ungrab(self)
+		if not self.sp_enable:
+			return
+		self.start_touch_pos = None
+		self.start_offset = None
+
+	def draw_border(self):
+		if not self.sp_eanble:
+			return
+		self.canvas.after.clear()
+		with self.canvas.after:
+			Color(1,0,0,1)
+			Line(rectangle=(*self.pos, *self.size), width=1)
+
+	def undraw_border(self):
+		self.canvas.after.clear()