X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gr-wxgui%2Fsrc%2Fpython%2Fplotter%2Fgrid_plotter_base.py;fp=gr-wxgui%2Fsrc%2Fpython%2Fplotter%2Fgrid_plotter_base.py;h=fd318ffa060db49540b8cea2302775a2f32cccf6;hb=d9744799b7df6c09180778540bf55eb9dc84281b;hp=0000000000000000000000000000000000000000;hpb=88304ce16a97945d13510b5fdaefcc0f62462d9d;p=debian%2Fgnuradio

diff --git a/gr-wxgui/src/python/plotter/grid_plotter_base.py b/gr-wxgui/src/python/plotter/grid_plotter_base.py
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+#
+# Copyright 2009 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+import wx
+import wx.glcanvas
+from OpenGL import GL
+import common
+from plotter_base import plotter_base
+import gltext
+import math
+
+GRID_LINE_COLOR_SPEC = (.7, .7, .7) #gray
+GRID_BORDER_COLOR_SPEC = (0, 0, 0) #black
+TICK_TEXT_FONT_SIZE = 9
+TITLE_TEXT_FONT_SIZE = 13
+UNITS_TEXT_FONT_SIZE = 9
+AXIS_LABEL_PADDING = 5
+TICK_LABEL_PADDING = 5
+TITLE_LABEL_PADDING = 7
+POINT_LABEL_FONT_SIZE = 8
+POINT_LABEL_COLOR_SPEC = (1, 1, .5)
+POINT_LABEL_PADDING = 3
+GRID_LINE_DASH_LEN = 4
+
+##################################################
+# Grid Plotter Base Class
+##################################################
+class grid_plotter_base(plotter_base):
+
+	def __init__(self, parent, min_padding=(0, 0, 0, 0)):
+		plotter_base.__init__(self, parent)
+		#setup grid cache
+		self._grid_cache = self.new_gl_cache(self._draw_grid, 25)
+		self.enable_grid_lines(True)
+		#setup padding
+		self.padding_top_min, self.padding_right_min, self.padding_bottom_min, self.padding_left_min = min_padding
+		#store title and unit strings
+		self.set_title('Title')
+		self.set_x_label('X Label')
+		self.set_y_label('Y Label')
+		#init the grid to some value
+		self.set_x_grid(-1, 1, 1)
+		self.set_y_grid(-1, 1, 1)
+		#setup point label cache
+		self._point_label_cache = self.new_gl_cache(self._draw_point_label, 75)
+		self.enable_point_label(False)
+		self.set_point_label_coordinate(None)
+		common.point_label_thread(self)
+		#init grid plotter
+		self.register_init(self._init_grid_plotter)
+
+	def _init_grid_plotter(self):
+		"""
+		Run gl initialization tasks.
+		"""
+		GL.glEnableClientState(GL.GL_VERTEX_ARRAY)
+
+	def set_point_label_coordinate(self, coor):
+		"""
+		Set the point label coordinate.
+		@param coor the coordinate x, y tuple or None 
+		"""
+		self.lock()
+		self._point_label_coordinate = coor
+		self._point_label_cache.changed(True)
+		self.update()
+		self.unlock()
+
+	def enable_point_label(self, enable=None):
+		"""
+		Enable/disable the point label.
+		@param enable true to enable
+		@return the enable state when None
+		"""
+		if enable is None: return self._enable_point_label
+		self.lock()
+		self._enable_point_label = enable
+		self._point_label_cache.changed(True)
+		self.unlock()
+
+	def set_title(self, title):
+		"""
+		Set the title.
+		@param title the title string
+		"""
+		self.lock()
+		self.title = title
+		self._grid_cache.changed(True)
+		self.unlock()
+
+	def set_x_label(self, x_label, x_units=''):
+		"""
+		Set the x label and units.
+		@param x_label the x label string
+		@param x_units the x units string
+		"""
+		self.lock()
+		self.x_label = x_label
+		self.x_units = x_units
+		self._grid_cache.changed(True)
+		self.unlock()
+
+	def set_y_label(self, y_label, y_units=''):
+		"""
+		Set the y label and units.
+		@param y_label the y label string
+		@param y_units the y units string
+		"""
+		self.lock()
+		self.y_label = y_label
+		self.y_units = y_units
+		self._grid_cache.changed(True)
+		self.unlock()
+
+	def set_x_grid(self, minimum, maximum, step, scale=False):
+		"""
+		Set the x grid parameters.
+		@param minimum the left-most value
+		@param maximum the right-most value
+		@param step the grid spacing
+		@param scale true to scale the x grid
+		"""
+		self.lock()
+		self.x_min = float(minimum)
+		self.x_max = float(maximum)
+		self.x_step = float(step)
+		if scale:
+			coeff, exp, prefix = common.get_si_components(max(abs(self.x_min), abs(self.x_max)))
+			self.x_scalar = 10**(-exp)
+			self.x_prefix = prefix
+		else:
+			self.x_scalar = 1.0
+			self.x_prefix = ''
+		for cache in self._gl_caches: cache.changed(True)
+		self.unlock()
+
+	def set_y_grid(self, minimum, maximum, step, scale=False):
+		"""
+		Set the y grid parameters.
+		@param minimum the bottom-most value
+		@param maximum the top-most value
+		@param step the grid spacing
+		@param scale true to scale the y grid
+		"""
+		self.lock()
+		self.y_min = float(minimum)
+		self.y_max = float(maximum)
+		self.y_step = float(step)
+		if scale:
+			coeff, exp, prefix = common.get_si_components(max(abs(self.y_min), abs(self.y_max)))
+			self.y_scalar = 10**(-exp)
+			self.y_prefix = prefix
+		else:
+			self.y_scalar = 1.0
+			self.y_prefix = ''
+		for cache in self._gl_caches: cache.changed(True)
+		self.unlock()
+
+	def _draw_grid(self):
+		"""
+		Create the x, y, tick, and title labels.
+		Resize the padding for the labels.
+		Draw the border, grid, title, and labels.
+		"""
+		##################################################
+		# Create GL text labels
+		##################################################
+		#create x tick labels
+		x_tick_labels = [(tick, self._get_tick_label(tick, self.x_units))
+			for tick in self._get_ticks(self.x_min, self.x_max, self.x_step, self.x_scalar)]
+		#create x tick labels
+		y_tick_labels = [(tick, self._get_tick_label(tick, self.y_units))
+			for tick in self._get_ticks(self.y_min, self.y_max, self.y_step, self.y_scalar)]
+		#create x label
+		x_label_str = self.x_units and "%s (%s%s)"%(self.x_label, self.x_prefix, self.x_units) or self.x_label
+		x_label = gltext.Text(x_label_str, bold=True, font_size=UNITS_TEXT_FONT_SIZE, centered=True)
+		#create y label
+		y_label_str = self.y_units and "%s (%s%s)"%(self.y_label, self.y_prefix, self.y_units) or self.y_label
+		y_label = gltext.Text(y_label_str, bold=True, font_size=UNITS_TEXT_FONT_SIZE, centered=True)
+		#create title
+		title_label = gltext.Text(self.title, bold=True, font_size=TITLE_TEXT_FONT_SIZE, centered=True)
+		##################################################
+		# Resize the padding
+		##################################################
+		self.padding_top = max(2*TITLE_LABEL_PADDING + title_label.get_size()[1], self.padding_top_min)
+		self.padding_right = max(2*TICK_LABEL_PADDING, self.padding_right_min)
+		self.padding_bottom = max(2*AXIS_LABEL_PADDING + TICK_LABEL_PADDING + x_label.get_size()[1] + max([label.get_size()[1] for tick, label in x_tick_labels]), self.padding_bottom_min)
+		self.padding_left = max(2*AXIS_LABEL_PADDING + TICK_LABEL_PADDING + y_label.get_size()[1] + max([label.get_size()[0] for tick, label in y_tick_labels]), self.padding_left_min)
+		##################################################
+		# Draw Grid X
+		##################################################
+		for tick, label in x_tick_labels:
+			scaled_tick = (self.width-self.padding_left-self.padding_right)*\
+				(tick/self.x_scalar-self.x_min)/(self.x_max-self.x_min) + self.padding_left
+			self._draw_grid_line(
+				(scaled_tick, self.padding_top),
+				(scaled_tick, self.height-self.padding_bottom),
+			)
+			w, h = label.get_size()
+			label.draw_text(wx.Point(scaled_tick-w/2, self.height-self.padding_bottom+TICK_LABEL_PADDING))
+		##################################################
+		# Draw Grid Y
+		##################################################
+		for tick, label in y_tick_labels:
+			scaled_tick = (self.height-self.padding_top-self.padding_bottom)*\
+				(1 - (tick/self.y_scalar-self.y_min)/(self.y_max-self.y_min)) + self.padding_top
+			self._draw_grid_line(
+				(self.padding_left, scaled_tick),
+				(self.width-self.padding_right, scaled_tick),
+			)
+			w, h = label.get_size()
+			label.draw_text(wx.Point(self.padding_left-w-TICK_LABEL_PADDING, scaled_tick-h/2))
+		##################################################
+		# Draw Border
+		##################################################
+		GL.glColor3f(*GRID_BORDER_COLOR_SPEC)
+		self._draw_rect(
+			self.padding_left,
+			self.padding_top,
+			self.width - self.padding_right - self.padding_left,
+			self.height - self.padding_top - self.padding_bottom,
+			fill=False,
+		)
+		##################################################
+		# Draw Labels
+		##################################################
+		#draw title label
+		title_label.draw_text(wx.Point(self.width/2.0, TITLE_LABEL_PADDING + title_label.get_size()[1]/2))
+		#draw x labels
+		x_label.draw_text(wx.Point(
+				(self.width-self.padding_left-self.padding_right)/2.0 + self.padding_left,
+				self.height-(AXIS_LABEL_PADDING + x_label.get_size()[1]/2),
+				)
+		)
+		#draw y labels
+		y_label.draw_text(wx.Point(
+				AXIS_LABEL_PADDING + y_label.get_size()[1]/2,
+				(self.height-self.padding_top-self.padding_bottom)/2.0 + self.padding_top,
+			), rotation=90,
+		)
+
+	def _get_tick_label(self, tick, unit):
+		"""
+		Format the tick value and create a gl text.
+		@param tick the floating point tick value
+		@param unit the axis unit
+		@return the tick label text
+		"""
+		if unit: tick_str = common.sci_format(tick)
+		else: tick_str = common.eng_format(tick)
+		return gltext.Text(tick_str, font_size=TICK_TEXT_FONT_SIZE)
+
+	def _get_ticks(self, min, max, step, scalar):
+		"""
+		Determine the positions for the ticks.
+		@param min the lower bound
+		@param max the upper bound
+		@param step the grid spacing
+		@param scalar the grid scaling
+		@return a list of tick positions between min and max
+		"""
+		#cast to float
+		min = float(min)
+		max = float(max)
+		step = float(step)
+		#check for valid numbers
+		try:
+			assert step > 0
+			assert max > min
+			assert max - min > step
+		except AssertionError: return [-1, 1]
+		#determine the start and stop value
+		start = int(math.ceil(min/step))
+		stop = int(math.floor(max/step))
+		return [i*step*scalar for i in range(start, stop+1)]
+
+	def enable_grid_lines(self, enable=None):
+		"""
+		Enable/disable the grid lines.
+		@param enable true to enable
+		@return the enable state when None
+		"""
+		if enable is None: return self._enable_grid_lines
+		self.lock()
+		self._enable_grid_lines = enable
+		self._grid_cache.changed(True)
+		self.unlock()
+
+	def _draw_grid_line(self, coor1, coor2):
+		"""
+		Draw a dashed line from coor1 to coor2.
+		@param corr1 a tuple of x, y
+		@param corr2 a tuple of x, y
+		"""
+		if not self.enable_grid_lines(): return
+		length = math.sqrt((coor1[0] - coor2[0])**2 + (coor1[1] - coor2[1])**2)
+		num_points = int(length/GRID_LINE_DASH_LEN)
+		#calculate points array
+		points = [(
+			coor1[0] + i*(coor2[0]-coor1[0])/(num_points - 1),
+			coor1[1] + i*(coor2[1]-coor1[1])/(num_points - 1)
+		) for i in range(num_points)]
+		#set color and draw
+		GL.glColor3f(*GRID_LINE_COLOR_SPEC)
+		GL.glVertexPointerf(points)
+		GL.glDrawArrays(GL.GL_LINES, 0, len(points))
+
+	def _draw_rect(self, x, y, width, height, fill=True):
+		"""
+		Draw a rectangle on the x, y plane.
+		X and Y are the top-left corner.
+		@param x the left position of the rectangle
+		@param y the top position of the rectangle
+		@param width the width of the rectangle
+		@param height the height of the rectangle
+		@param fill true to color inside of rectangle
+		"""
+		GL.glBegin(fill and GL.GL_QUADS or GL.GL_LINE_LOOP)
+		GL.glVertex2f(x, y)
+		GL.glVertex2f(x+width, y)
+		GL.glVertex2f(x+width, y+height)
+		GL.glVertex2f(x, y+height)
+		GL.glEnd()
+
+	def _draw_point_label(self):
+		"""
+		Draw the point label for the last mouse motion coordinate.
+		The mouse coordinate must be an X, Y tuple.
+		The label will be drawn at the X, Y coordinate.
+		The values of the X, Y coordinate will be scaled to the current X, Y bounds.
+		"""
+		if not self.enable_point_label(): return
+		if not self._point_label_coordinate: return
+		x, y = self._point_label_coordinate
+		if x < self.padding_left or x > self.width-self.padding_right: return
+		if y < self.padding_top or y > self.height-self.padding_bottom: return
+		#scale to window bounds
+		x_win_scalar = float(x - self.padding_left)/(self.width-self.padding_left-self.padding_right)
+		y_win_scalar = float((self.height - y) - self.padding_bottom)/(self.height-self.padding_top-self.padding_bottom)
+		#scale to grid bounds
+		x_val = x_win_scalar*(self.x_max-self.x_min) + self.x_min
+		y_val = y_win_scalar*(self.y_max-self.y_min) + self.y_min
+		#create text
+		label_str = self._populate_point_label(x_val, y_val)
+		if not label_str: return
+		txt = gltext.Text(label_str, font_size=POINT_LABEL_FONT_SIZE)
+		w, h = txt.get_size()
+		#draw rect + text
+		GL.glColor3f(*POINT_LABEL_COLOR_SPEC)
+		if x > self.width/2: x -= w+2*POINT_LABEL_PADDING
+		self._draw_rect(x, y-h-2*POINT_LABEL_PADDING, w+2*POINT_LABEL_PADDING, h+2*POINT_LABEL_PADDING)
+		txt.draw_text(wx.Point(x+POINT_LABEL_PADDING, y-h-POINT_LABEL_PADDING))