From 7d8e9ab3b16546e91144e256e88f9f490abc7ec2 Mon Sep 17 00:00:00 2001
From: DH4
Date: Thu, 1 Jun 2017 22:46:45 -0500
Subject: Added aspect ratio scaling to preview area.

---
 background.jpg  | Bin 0 -> 14782 bytes
 main.py         |  35 +++++++++++++++++++----
 mainwindow.ui   |  86 ++++++++++++++++----------------------------------------
 video_thread.py |   2 +-
 4 files changed, 55 insertions(+), 68 deletions(-)
 create mode 100644 background.jpg

diff --git a/background.jpg b/background.jpg
new file mode 100644
index 0000000..f746432
Binary files /dev/null and b/background.jpg differ
diff --git a/main.py b/main.py
index 8bbbf08..f34cbee 100644
--- a/main.py
+++ b/main.py
@@ -3,7 +3,7 @@ from os.path import expanduser
 from queue import Queue
 from importlib import import_module
 from PyQt4 import QtCore, QtGui, uic
-from PyQt4.QtCore import QSettings, QModelIndex
+from PyQt4.QtCore import QSettings, QModelIndex, Qt
 from PyQt4.QtGui import QDesktopServices
 
 import preview_thread, core, video_thread
@@ -107,6 +107,29 @@ class Command(QtCore.QObject):
     self.settings.setValue("textColor", '%s,%s,%s' % self.textColor)
     sys.exit(0)
 '''
+
+class PreviewWindow(QtGui.QLabel):
+    def __init__(self, parent, img):
+        super(PreviewWindow, self).__init__()
+        self.parent = parent
+        self.setFrameStyle(QtGui.QFrame.StyledPanel)
+        self.pixmap = QtGui.QPixmap(img)
+
+    def paintEvent(self, event):
+        size = self.size()
+        painter = QtGui.QPainter(self)
+        point = QtCore.QPoint(0,0)
+        scaledPix = self.pixmap.scaled(size, Qt.KeepAspectRatio, transformMode = Qt.SmoothTransformation)
+        # start painting the label from left upper corner
+        point.setX((size.width() - scaledPix.width())/2)
+        point.setY((size.height() - scaledPix.height())/2)
+        #print point.x(), ' ', point.y()
+        painter.drawPixmap(point, scaledPix)
+
+    def changePixmap(self, img):
+        self.pixmap = QtGui.QPixmap(img)
+        self.repaint()
+
 class Main(QtCore.QObject):
 
   newTask = QtCore.pyqtSignal(str, list)
@@ -151,6 +174,9 @@ class Main(QtCore.QObject):
     window.progressBar_createVideo.setValue(0)
     window.pushButton_createVideo.clicked.connect(self.createAudioVisualisation)
     window.setWindowTitle("Audio Visualizer")
+
+    self.previewWindow = PreviewWindow(self, r"background.jpg")
+    window.verticalLayout_previewWrapper.addWidget(self.previewWindow)
     
     self.modules = self.findComponents()
     for component in self.modules:
@@ -269,10 +295,7 @@ class Main(QtCore.QObject):
     # self.processTask.emit()
 
   def showPreviewImage(self, image):
-    self._scaledPreviewImage = image
-    self._previewPixmap = QtGui.QPixmap.fromImage(self._scaledPreviewImage)
-
-    self.window.label_previewContainer.setPixmap(self._previewPixmap)
+    self.previewWindow.changePixmap(image)
 
   def findComponents(self):
     def findComponents():
@@ -548,7 +571,7 @@ if __name__ == "__main__":
     
     topMargin = 0 if (dpi == 96) else int(10 * (dpi / 96))
     window.resize(window.width() * (dpi / 96), window.height() * (dpi / 96))
-    window.verticalLayout_2.setContentsMargins(0, topMargin, 0, 0)
+    #window.verticalLayout_2.setContentsMargins(0, topMargin, 0, 0)
   
     main = Main(window)
 
diff --git a/mainwindow.ui b/mainwindow.ui
index 0dcce91..808073b 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -27,75 +27,24 @@
     <item>
      <layout class="QHBoxLayout" name="horizontalLayout">
       <item>
-       <layout class="QVBoxLayout" name="verticalLayout_2">
+       <layout class="QVBoxLayout" name="verticalLayout_previewWrapper">
+        <property name="sizeConstraint">
+         <enum>QLayout::SetDefaultConstraint</enum>
+        </property>
         <property name="topMargin">
          <number>0</number>
         </property>
         <item>
-         <spacer name="verticalSpacer_6">
-          <property name="orientation">
-           <enum>Qt::Vertical</enum>
-          </property>
-          <property name="sizeType">
-           <enum>QSizePolicy::Minimum</enum>
-          </property>
-          <property name="sizeHint" stdset="0">
-           <size>
-            <width>0</width>
-            <height>0</height>
-           </size>
-          </property>
-         </spacer>
-        </item>
-        <item>
-         <widget class="QLabel" name="label_previewContainer">
-          <property name="sizePolicy">
-           <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
-            <horstretch>0</horstretch>
-            <verstretch>0</verstretch>
-           </sizepolicy>
-          </property>
-          <property name="minimumSize">
-           <size>
-            <width>356</width>
-            <height>280</height>
-           </size>
-          </property>
-          <property name="sizeIncrement">
-           <size>
-            <width>0</width>
-            <height>0</height>
-           </size>
-          </property>
-          <property name="autoFillBackground">
-           <bool>false</bool>
-          </property>
-          <property name="styleSheet">
-           <string notr="true">background-color:rgba(255, 255, 255, 15);
-</string>
-          </property>
-          <property name="text">
-           <string/>
-          </property>
-          <property name="scaledContents">
-           <bool>true</bool>
-          </property>
-          <property name="alignment">
-           <set>Qt::AlignCenter</set>
-          </property>
-         </widget>
-        </item>
-        <item>
-         <spacer name="verticalSpacer_5">
+         <spacer name="horizontalSpacer_previewSpacer">
           <property name="orientation">
-           <enum>Qt::Vertical</enum>
+           <enum>Qt::Horizontal</enum>
           </property>
           <property name="sizeType">
-           <enum>QSizePolicy::Minimum</enum>
+           <enum>QSizePolicy::MinimumExpanding</enum>
           </property>
           <property name="sizeHint" stdset="0">
            <size>
-            <width>0</width>
+            <width>420</width>
             <height>0</height>
            </size>
           </property>
@@ -105,16 +54,25 @@
       </item>
       <item>
        <layout class="QVBoxLayout" name="verticalLayout_3">
+        <property name="sizeConstraint">
+         <enum>QLayout::SetMinimumSize</enum>
+        </property>
         <property name="leftMargin">
          <number>3</number>
         </property>
         <item>
          <layout class="QVBoxLayout" name="verticalLayout_4">
+          <property name="sizeConstraint">
+           <enum>QLayout::SetMinimumSize</enum>
+          </property>
           <property name="leftMargin">
            <number>3</number>
           </property>
           <item>
            <layout class="QHBoxLayout" name="horizontalLayout_16">
+            <property name="sizeConstraint">
+             <enum>QLayout::SetMinimumSize</enum>
+            </property>
             <item>
              <widget class="QPushButton" name="pushButton_openProject">
               <property name="text">
@@ -141,10 +99,10 @@
           <item>
            <spacer name="verticalSpacer">
             <property name="orientation">
-             <enum>Qt::Vertical</enum>
+             <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeType">
-             <enum>QSizePolicy::Fixed</enum>
+             <enum>QSizePolicy::Minimum</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
@@ -218,6 +176,12 @@
          <layout class="QHBoxLayout" name="horizontalLayout_15">
           <item>
            <widget class="QComboBox" name="comboBox_openPreset">
+            <property name="sizePolicy">
+             <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
+              <horstretch>0</horstretch>
+              <verstretch>0</verstretch>
+             </sizepolicy>
+            </property>
             <item>
              <property name="text">
               <string>Open Preset</string>
diff --git a/video_thread.py b/video_thread.py
index dee254a..a7c7ac6 100644
--- a/video_thread.py
+++ b/video_thread.py
@@ -63,7 +63,7 @@ class Worker(QtCore.QObject):
     def previewDispatch(self):
         while True:
             i = self.previewQueue.get()
-            if time.time() - self.lastPreview >= 0.05 or i[0] == 0:
+            if time.time() - self.lastPreview >= 0.06 or i[0] == 0:
                 self._image = ImageQt(i[1])
                 self.imageCreated.emit(QtGui.QImage(self._image))
                 self.lastPreview = time.time()
-- 
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