class RulerWindow(QWidget):
def __init__(self, *args, **kwargs):
super(RulerWindow, self).__init__(*args, **kwargs)
self.setWindowTitle("Screen Ruler")
self.setWindowIcon(QIcon("ruler.ico"))
self.initial_dots = []
self.final_dots = []
self.setWindowFlags(Qt.WindowStaysOnTopHint | Qt.FramelessWindowHint
| Qt.WindowSystemMenuHint)
self.setAttribute(Qt.WA_TranslucentBackground)
self.ignored = False
self.setMouseTracking(True)
self.custom_cursor = self.generate_custom_cursor()
#self.setCursor(Qt.BlankCursor)
self.setCursor(self.custom_cursor)
def set_sizes(self, h_res, v_res, size):
if h_res == "auto":
screen = self.screen()
self.ppix = screen.physicalDotsPerInchX()
self.ppiy = screen.physicalDotsPerInchY()
h_res = screen.geometry().width()
v_res = screen.geometry().height()
#if self.ppix != self.ppiy:
# print("WARNING! due to the properties of your screen angles are slightly distorted and length of diagonals are approximations")
else:
diagonal_res = math.sqrt(int(h_res)**2 + int(v_res)**2)
self.ppix = diagonal_res / float(size) # Pixels per inch
self.ppiy = self.ppix
self.preview = Preview(h_res, v_res, self)
self.preview.show()
self.h_res, self.v_res = h_res, v_res
def paintEvent(self, event):
painter = QPainter()
painter.begin(self)
if not self.ignored:
self.paint_background(painter)
painter.setPen(QColor(255, 0, 255))
painter.setBrush(QColor(0, 0, 0))
for index, i in enumerate(self.initial_dots):
painter.setPen(QColor(255, 0, 255))
painter.drawRect(i.x() - 1, i.y() - 1, 2, 2)
try:
end_point = self.final_dots[index]
painter.setPen(QColor(0, 0, 255))
moving = False
except IndexError:
# There is no end point, so cursor is end point
end_point = self.cursor().pos()
painter.setPen(QColor(0, 0, 255, 64))
moving = True
mid_point = QPoint(end_point.x(), i.y())
painter.drawPolyline(i, mid_point, end_point, i)
painter.setPen(QColor(255, 0, 255))
halfx = (mid_point.x() - i.x()) / 2 + i.x()
halfy = (end_point.y() - mid_point.y()) / 2 + mid_point.y()
# Draw perpendicular magenta lines in each of the triangle's sides' center
top_horizontal_half = QPoint(halfx, i.y() + 10)
bot_horizontal_half = QPoint(halfx, i.y() - 10)
left_vertical_half = QPoint(end_point.x() - 10, halfy)
right_vertical_half = QPoint(end_point.x() + 10, halfy)
try:
hipotenuse = math.sqrt((2 * (halfx - i.x()))**2 +
(2 * (halfy - mid_point.y()))**2)
scaling_factor = hipotenuse / 10 # To ensure line length = 10
y_change = (2 * (halfx - i.x()) / scaling_factor)
x_change = (2 * (halfy - mid_point.y()) / scaling_factor)
except ZeroDivisionError:
y_change = 0
x_change = 0
top_hipotenuse_half = QPoint(halfx - x_change, halfy + y_change)
bot_hipotenuse_half = QPoint(halfx + x_change, halfy - y_change)
if hipotenuse >= 20 and moving: # To not be in the way while looking for a second point
painter.drawLine(top_horizontal_half, bot_horizontal_half)
painter.drawLine(left_vertical_half, right_vertical_half)
painter.drawLine(top_hipotenuse_half, bot_hipotenuse_half)
painter.setPen(QColor(255, 255, 255))
x_px = abs(int((halfx - i.x()) * 2)) + 1
y_px = abs(int((halfy - mid_point.y()) * 2)) + 1
hipotenuse = abs(hipotenuse)
inch_to_cm = 2.54
x_inches = x_px / self.ppix
y_inches = y_px / self.ppiy
hip_inches = hipotenuse / ((self.ppiy + self.ppix) / 2)
x_cm = x_inches * inch_to_cm
y_cm = y_inches * inch_to_cm
hip_cm = hip_inches * inch_to_cm
x_text = str(
x_px
) + "px | " + f"{x_cm:7.2f}" + "cm | " + f"{x_inches:7.2f}" + "inch"
y_text = str(
y_px
) + "px | " + f"{y_cm:7.2f}" + "cm | " + f"{y_inches:7.2f}" + "inch"
hip_text = f"{abs(hipotenuse):7.2f}" + "px | " + f"{hip_cm:7.2f}" + "cm | " + f"{hip_inches:7.2f}" + "inch"
# in 7.2f -> 7 = max char, 2 = max floating point precision
if moving and hipotenuse >= 20: # To not be in the way while looking for a second point
painter.drawText(QPoint(halfx, i.y()), x_text)
painter.drawText(QPoint(end_point.x(), halfy), y_text)
painter.drawText(
QPoint(halfx, halfy - 12),
hip_text) # 7 = max char, 2 = max floating point precision
elif not moving:
# drawStaticText is more optimized if it rarely updates
painter.drawStaticText(QPoint(halfx, i.y()),
QStaticText(x_text))
painter.drawStaticText(QPoint(end_point.x(), halfy),
QStaticText(y_text))
painter.drawStaticText(QPoint(halfx, halfy - 12),
QStaticText(hip_text))
painter.setPen(QColor(255, 0, 255))
for i in self.final_dots:
painter.drawRect(i.x() - 1, i.y() - 1, 2, 2)
"""if not self.ignored:
self.paint_cursor(painter)"""
painter.end()
def paint_background(self, painter):
painter.setBrush(QColor(0, 0, 0, 120)) # Semitransparent brush
painter.setPen(Qt.NoPen)
corners = self.preview.screen_corners
# drawRect(left margin, top margin, width, height)
# corners[0] = top left corner
# corners[1] = bot right corner
# corners[][0] = x component
# corners[][1] = y component
# black rectangle
# topleft corner = (screen left, screen top)
# botright corner = (preview left, screen bottom)
painter.drawRect(0, 0, corners[0][0], self.v_res)
# black rectangle
# topleft corner = (preview left, screen top)
# botright corner = (preview right, preview top)
painter.drawRect(corners[0][0], 0, corners[1][0] - corners[0][0],
corners[0][1])
# black rectangle
# topleft corner = (preview left, preview bottom)
# botright corner = (preview right, screen bottom)
painter.drawRect(corners[0][0], corners[1][1],
corners[1][0] - corners[0][0],
self.v_res - corners[1][1])
# black rectangle
# topleft corner = (preview right, screen top)
# botright corner = (preview right, screen bot)
painter.drawRect(corners[1][0], 0, self.h_res - corners[1][0],
self.v_res)
painter.setPen(QColor(
255, 255, 255,
1)) # Almost transparent brush, just so there is something there
painter.setBrush(QColor(
0, 0, 0,
1)) # Almost transparent brush, just so there is something there
# transparent rectangle with blue border
# topleft corner = (preview left, preview top)
# botright corner = (preview right, preview bottom)
painter.drawRect(corners[0][0] - 1, corners[0][1] - 1,
corners[1][0] - corners[0][0] + 1,
corners[1][1] - corners[0][1] + 1)
"""painter.setBrush(QColor(255, 255, 255, 255))
painter.drawRect(corners[0][0]+10, # 1 white dot where the cursor is
corners[0][1]+10,
1,
1
)"""
def mousePressEvent(self, event):
if len(self.initial_dots) == len(self.final_dots):
self.initial_dots.append(event.pos())
else:
self.final_dots.append(event.pos())
self.repaint()
self.preview.update()
def mouseDoubleClickEvent(self, event):
self.final_dots = []
self.initial_dots = []
self.update()
self.preview.update()
def mouseMoveEvent(self, event):
self.preview.update_pos()
self.repaint()
self.preview.update()
def keyPressEvent(self, event):
key = event.key()
if key in [16777234, 16777235, 16777236, 16777237]: # Arrows
cursor = self.cursor()
x = cursor.pos().x()
y = cursor.pos().y()
if key == 16777234: # Left arrow
new_x, new_y = (x - 1, y)
if key == 16777235: # Up arrow
new_x, new_y = (x, y - 1)
if key == 16777236: # Right arrow
new_x, new_y = (x + 1, y)
if key == 16777237: # Down arrow
new_x, new_y = (x, y + 1)
cursor.setPos(new_x, new_y)
elif key == 80: # P key
self.ignore_input(not self.ignored)
elif key == 16777220: # Enter key
# Simulate click
self.mousePressEvent(self.cursor())
self.preview.repaint()
def ignore_input(self, ignore=True):
self.ignored = ignore
self.setMouseTracking(not ignore)
flags = Qt.WindowStaysOnTopHint | Qt.FramelessWindowHint | Qt.WindowSystemMenuHint
if ignore:
flags = flags | Qt.WindowTransparentForInput
self.setWindowFlags(flags)
self.showFullScreen()
if ignore:
cursor = Qt.ArrowCursor
self.preview.hide()
else:
self.preview.show()
cursor = Qt.BlankCursor
self.setCursor(cursor)
def generate_custom_cursor(self):
print(QPixmap.defaultDepth())
bitmap = QPixmap(QSize(32, 32))
mask = QPixmap(QSize(32, 32))
bitmap.fill(QColor("#ffffff"))
mask.fill(QColor("#ffffff"))
x, y = Preview.M_SIZE
painter = QPainter(bitmap)
painter.setPen(QColor("#000000"))
painter.drawRect(0, 0, x + 2, y + 2)
painter.drawLine(x / 2 + 2, 1, x / 2 + 2, y + 1)
painter.drawLine(1, y / 2 + 2, x + 1, y / 2 + 2)
painter.end()
return QCursor(QBitmap(bitmap), QBitmap(mask), (x + 2) / 2,
(y + 2) / 2)
