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Traffic-Intersection-Monito…/qt_app_pyside1/ui/temp_live_display.py.new

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from PySide6.QtWidgets import (
QWidget, QVBoxLayout, QLabel, QSizePolicy
)
from PySide6.QtCore import Qt, Signal, QSize
from PySide6.QtGui import QPixmap, QImage
import cv2
import numpy as np
class SimpleLiveDisplay(QWidget):
"""Simpler implementation for video display using QLabel instead of QGraphicsView"""
video_dropped = Signal(str) # For drag and drop compatibility
def __init__(self):
super().__init__()
self.layout = QVBoxLayout(self)
self.layout.setContentsMargins(0, 0, 0, 0)
# Create QLabel for display
self.display_label = QLabel()
self.display_label.setAlignment(Qt.AlignCenter)
self.display_label.setMinimumSize(640, 480)
self.display_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
self.display_label.setStyleSheet("background-color: black;")
# Set up drag and drop
self.setAcceptDrops(True)
# Add to layout
self.layout.addWidget(self.display_label)
# Initialize with black screen
self.reset_display()
def update_frame(self, pixmap):
"""Update the display with a new frame"""
if pixmap and not pixmap.isNull():
print(f"DEBUG: SimpleLiveDisplay updating with pixmap {pixmap.width()}x{pixmap.height()}")
try:
# Get current label size
label_size = self.display_label.size()
if label_size.width() <= 1 or label_size.height() <= 1:
# If label doesn't have valid size yet, use a reasonable default
label_size = QSize(640, 480)
# Make a deep copy to prevent any sharing issues
pixmap_copy = QPixmap(pixmap)
# Scale the pixmap to fit the label while maintaining aspect ratio
scaled_pixmap = pixmap_copy.scaled(
label_size,
Qt.AspectRatioMode.KeepAspectRatio,
Qt.TransformationMode.SmoothTransformation
)
# Set the pixmap to the label
self.display_label.setPixmap(scaled_pixmap)
# Force an immediate update
self.display_label.update()
print("DEBUG: SimpleLiveDisplay - pixmap set successfully")
except Exception as e:
print(f"ERROR in SimpleLiveDisplay.update_frame: {e}")
import traceback
traceback.print_exc()
else:
print("DEBUG: SimpleLiveDisplay received null or invalid pixmap")
def resizeEvent(self, event):
"""Handle resize events"""
super().resizeEvent(event)
# If we have a pixmap, rescale it to fit the new size
if not self.display_label.pixmap() or self.display_label.pixmap().isNull():
return
try:
scaled_pixmap = self.display_label.pixmap().scaled(
self.display_label.size(),
Qt.AspectRatioMode.KeepAspectRatio,
Qt.TransformationMode.SmoothTransformation
)
self.display_label.setPixmap(scaled_pixmap)
except Exception as e:
print(f"ERROR in SimpleLiveDisplay.resizeEvent: {e}")
def reset_display(self):
"""Reset display to black"""
try:
blank = QPixmap(640, 480)
blank.fill(Qt.black)
self.display_label.setPixmap(blank)
except Exception as e:
print(f"ERROR in SimpleLiveDisplay.reset_display: {e}")
def dragEnterEvent(self, event):
"""Handle drag enter events"""
if event.mimeData().hasUrls():
url = event.mimeData().urls()[0].toLocalFile()
if url.lower().endswith(('.mp4', '.avi', '.mov', '.mkv', '.webm')):
event.acceptProposedAction()
def dropEvent(self, event):
"""Handle drop events"""
if event.mimeData().hasUrls():
url = event.mimeData().urls()[0].toLocalFile()
if url.lower().endswith(('.mp4', '.avi', '.mov', '.mkv', '.webm')):
self.video_dropped.emit(url)