class FLGLWidget(Fl.Gl_Window):
def __init__(self, X, Y, W, H):
Fl.Gl_Window.__init__(self, X, Y, W, H)
# Set OpenGL mode
flg = Fl.RGB | Fl.ALPHA | Fl.DOUBLE | Fl.DEPTH | Fl.STENCIL | \
Fl.MULTISAMPLE
self.mode(flg)
self.vgcontext = None
self.renderer = None
self.dx, self.dy = 0., 0.
self.scale = 1.
self.mouse_x = None
self.mouse_y = None
def openFile(self, widget = None, filename = None):
if filename is None:
native = Fl.Native_File_Chooser()
native.title("Select SVG file")
native.filter('SVG\t*.svg')
ret = native.show()
if ret == -1 or ret == 1:
return
filename = native.filename()
xmltree = readFile(filename)
self.renderer = Renderer(xmltree, imageprovider = image_cb)
if isinstance(filename, basestring):
name = os.path.split(filename)[-1]
else:
name = 'unamed.svg'
self.updateScale()
self.redraw()
def updateScale(self):
# scale to bounding box
if not self.renderer is None:
width, height = self.w(), self.h()
bbox = self.box = self.renderer.bounds
self.scale = .9*min(width/bbox.width, height/bbox.height)
def draw(self):
width, height = self.w(), self.h()
if not self.context_valid():
self.vgcontext = vg.CreateContextSH(width, height)
self.updateScale()
if not self.valid():
vg.ResizeSurfaceSH(width,height)
self.updateScale()
# Clear to white
vg.Setfv(vg.CLEAR_COLOR, 4, [1.,1.,1.,1.])
vg.Clear(0, 0, width, height)
if self.renderer is None:
return
# setup transform
box = self.box
scale = self.scale
dx, dy = self.dx, self.dy
vg.Seti(vg.MATRIX_MODE, vg.MATRIX_PATH_USER_TO_SURFACE)
vg.LoadIdentity()
vg.Scale(scale, scale)
vg.Translate(0., 1.5*box.height)
vg.Scale(1., -1.)
vg.Translate(-box.minx - dx, -box.miny + .5*box.height - dy)
# render paths
self.renderer.render()
# fix for garbage when drawing gradients
vg.Clear(0, 0, width, height)
self.renderer.render()
def handle(self, event):
if event == Fl.FOCUS:
self.redraw()
return 1
elif event == Fl.MOUSEWHEEL:
self.scale *= 1 + .1*Fl.event_dy()
self.redraw()
return 1
elif event == Fl.PUSH:
if Fl.event_button() == Fl.MIDDLE_MOUSE:
self.mouse_x = Fl.event_x()
self.mouse_y = Fl.event_y()
return 1
elif event == Fl.RELEASE:
self.mouse_x = None
self.mouse_y = None
return 0
elif event == Fl.DRAG:
if Fl.event_button() == Fl.MIDDLE_MOUSE:
if not self.mouse_x is None:
dx = Fl.event_x() - self.mouse_x
dy = Fl.event_y() - self.mouse_y
mat = vg.GetMatrix()
sx, sy = mat[0], mat[4]
self.dx -= dx/sx
self.dy += dy/sy
self.mouse_x += dx
self.mouse_y += dy
self.redraw()
return 1
return 0
class FLGLWidget(Fl.Gl_Window):
def __init__(self, X, Y, W, H):
Fl.Gl_Window.__init__(self, X, Y, W, H)
# Set OpenGL mode
flg = Fl.RGB | Fl.ALPHA | Fl.DOUBLE | Fl.DEPTH | Fl.STENCIL | \
Fl.MULTISAMPLE
self.mode(flg)
self.vgcontext = None
self.renderer = None
self.dx, self.dy = 0., 0.
self.scale = 1.
self.mouse_x = None
self.mouse_y = None
def openFile(self, widget=None, filename=None):
if filename is None:
native = Fl.Native_File_Chooser()
native.title("Select SVG file")
native.filter('SVG\t*.svg')
ret = native.show()
if ret == -1 or ret == 1:
return
filename = native.filename()
xmltree = readFile(filename)
self.renderer = Renderer(xmltree, imageprovider=image_cb)
if isinstance(filename, basestring):
name = os.path.split(filename)[-1]
else:
name = 'unamed.svg'
self.updateScale()
self.redraw()
def updateScale(self):
# scale to bounding box
if not self.renderer is None:
width, height = self.w(), self.h()
bbox = self.box = self.renderer.bounds
self.scale = .9 * min(width / bbox.width, height / bbox.height)
def draw(self):
width, height = self.w(), self.h()
if not self.context_valid():
self.vgcontext = vg.CreateContextSH(width, height)
self.updateScale()
if not self.valid():
vg.ResizeSurfaceSH(width, height)
self.updateScale()
# Clear to white
vg.Setfv(vg.CLEAR_COLOR, 4, [1., 1., 1., 1.])
vg.Clear(0, 0, width, height)
if self.renderer is None:
return
# setup transform
box = self.box
scale = self.scale
dx, dy = self.dx, self.dy
vg.Seti(vg.MATRIX_MODE, vg.MATRIX_PATH_USER_TO_SURFACE)
vg.LoadIdentity()
vg.Scale(scale, scale)
vg.Translate(0., 1.5 * box.height)
vg.Scale(1., -1.)
vg.Translate(-box.minx - dx, -box.miny + .5 * box.height - dy)
# render paths
self.renderer.render()
# fix for garbage when drawing gradients
vg.Clear(0, 0, width, height)
self.renderer.render()
def handle(self, event):
if event == Fl.FOCUS:
self.redraw()
return 1
elif event == Fl.MOUSEWHEEL:
self.scale *= 1 + .1 * Fl.event_dy()
self.redraw()
return 1
elif event == Fl.PUSH:
if Fl.event_button() == Fl.MIDDLE_MOUSE:
self.mouse_x = Fl.event_x()
self.mouse_y = Fl.event_y()
return 1
elif event == Fl.RELEASE:
self.mouse_x = None
self.mouse_y = None
return 0
elif event == Fl.DRAG:
if Fl.event_button() == Fl.MIDDLE_MOUSE:
if not self.mouse_x is None:
dx = Fl.event_x() - self.mouse_x
dy = Fl.event_y() - self.mouse_y
mat = vg.GetMatrix()
sx, sy = mat[0], mat[4]
self.dx -= dx / sx
self.dy += dy / sy
self.mouse_x += dx
self.mouse_y += dy
self.redraw()
return 1
return 0
pixels = vg.PixelBuffer(width,height)
ctx = vg.CreateOffScreenSH()
vg.StartOffScreenSH(ctx, width, height)
vg.Setfv(vg.CLEAR_COLOR, 4, [1.,1.,1.,1.])
vg.Clear(0, 0, width, height)
# center on bounding box
box = renderer.bounds
scale = min(width/box.width, height/box.height)
vg.Seti(vg.MATRIX_MODE, vg.MATRIX_PATH_USER_TO_SURFACE)
vg.LoadIdentity()
vg.Scale(scale, scale)
vg.Translate(0., 1.5*box.height)
vg.Scale(1., -1.)
vg.Translate(-box.minx, -box.miny + .5*box.height)
renderer.render()
vg.EndOffScreenSH(ctx, pixels)
vg.DestroyOffScreenSH(ctx)
img = Fl.RGB_Image(width,height, 4, 0, pixels)
widget.set_image(img)
window.show()
Fl.run()
widget = Fl.Button(10, 10, width, height)
pixels = vg.PixelBuffer(width, height)
ctx = vg.CreateOffScreenSH()
vg.StartOffScreenSH(ctx, width, height)
vg.Setfv(vg.CLEAR_COLOR, 4, [1., 1., 1., 1.])
vg.Clear(0, 0, width, height)
# center on bounding box
box = renderer.bounds
scale = min(width / box.width, height / box.height)
vg.Seti(vg.MATRIX_MODE, vg.MATRIX_PATH_USER_TO_SURFACE)
vg.LoadIdentity()
vg.Scale(scale, scale)
vg.Translate(0., 1.5 * box.height)
vg.Scale(1., -1.)
vg.Translate(-box.minx, -box.miny + .5 * box.height)
renderer.render()
vg.EndOffScreenSH(ctx, pixels)
vg.DestroyOffScreenSH(ctx)
img = Fl.RGB_Image(width, height, 4, 0, pixels)
widget.set_image(img)
window.show()
Fl.run()