qtuser-interfaceqwidget
adding a qwidget into QMainWindow as central widget
I created a Qwidget in QtCreator and want to put it into my QMainWindow as central widget. Here is the line that I do it inside the constructor of QMainWindow.
q = new QWidget();
setCentralWidget(q);
ui->setupUi(q);
In the photo below you can see how my qWidget looks like.
However after adding it into QMainWindow thats how it looks like
Here you can find .ui file. What might be the problem?
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QWidget" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>785</width>
<height>600</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>763</width>
<height>600</height>
</size>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<widget class="QWidget" name="">
<layout class="QHBoxLayout" name="horizontalLayout_4">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<layout class="QVBoxLayout" name="verticalLayout">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<widget class="MainGlWidget" name="MainScreen" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>640</width>
<height>480</height>
</size>
</property>
<property name="cursor">
<cursorShape>OpenHandCursor</cursorShape>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QVBoxLayout" name="verticalLayout_2">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<widget class="SideGlWidget" name="widget" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Preferred" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>120</width>
<height>120</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>50000</width>
<height>50000</height>
</size>
</property>
</widget>
</item>
<item>
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
</layout>
</widget>
<widget class="QWidget" name="">
<property name="geometry">
<rect>
<x>10</x>
<y>10</y>
<width>751</width>
<height>64</height>
</rect>
</property>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<layout class="QVBoxLayout" name="verticalLayout_3">
<item>
<widget class="QPushButton" name="pushButton">
<property name="sizePolicy">
<sizepolicy hsizetype="Minimum" vsizetype="Fixed">
<horstretch>30</horstretch>
<verstretch>30</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>30</width>
<height>30</height>
</size>
</property>
<property name="focusPolicy">
<enum>Qt::ClickFocus</enum>
</property>
<property name="text">
<string>OFF</string>
</property>
<property name="icon">
<iconset>
<normaloff>off.png</normaloff>
<normalon>on.jpg</normalon>off.png</iconset>
</property>
<property name="iconSize">
<size>
<width>50</width>
<height>50</height>
</size>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QVBoxLayout" name="verticalLayout_5">
<item>
<layout class="QHBoxLayout" name="horizontalLayout_5">
<item>
<widget class="QLabel" name="Wifi">
<property name="text">
<string>Wifi Signal</string>
</property>
</widget>
</item>
<item>
<widget class="QProgressBar" name="wifiProgressBar">
<property name="value">
<number>95</number>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QLabel" name="BatteryLabel">
<property name="text">
<string>Battery</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</item>
<item>
<widget class="QProgressBar" name="BatteryPB">
<property name="value">
<number>100</number>
</property>
<property name="textDirection">
<enum>QProgressBar::TopToBottom</enum>
</property>
</widget>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</widget>
</widget>
<layoutdefault spacing="6" margin="11"/>
<customwidgets>
<customwidget>
<class>MainGlWidget</class>
<extends>QWidget</extends>
<header>MainGlWidget.h</header>
<container>1</container>
<slots>
<slot>setXRotation(int)</slot>
<slot>setZRotation(int)</slot>
<slot>setYRotation(int)</slot>
</slots>
</customwidget>
<customwidget>
<class>SideGlWidget</class>
<extends>QWidget</extends>
<header>SideGlWidget.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>
Solution
You should use a top level layout to arrange your child layout elements horizontalLayout and horizontalLayout_4.
Here is our .ui file fixed:
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QWidget" name="MainWindow">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>785</width>
<height>600</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>763</width>
<height>600</height>
</size>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout_4">
<item>
<layout class="QHBoxLayout" name="horizontalLayout">
<item>
<layout class="QVBoxLayout" name="verticalLayout_3">
<item>
<widget class="QPushButton" name="pushButton">
<property name="sizePolicy">
<sizepolicy hsizetype="Minimum" vsizetype="Fixed">
<horstretch>30</horstretch>
<verstretch>30</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>30</width>
<height>30</height>
</size>
</property>
<property name="focusPolicy">
<enum>Qt::ClickFocus</enum>
</property>
<property name="text">
<string>OFF</string>
</property>
<property name="icon">
<iconset>
<normaloff>off.png</normaloff>
<normalon>on.jpg</normalon>off.png</iconset>
</property>
<property name="iconSize">
<size>
<width>50</width>
<height>50</height>
</size>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QVBoxLayout" name="verticalLayout_5">
<item>
<layout class="QHBoxLayout" name="horizontalLayout_5">
<item>
<widget class="QLabel" name="Wifi">
<property name="text">
<string>Wifi Signal</string>
</property>
</widget>
</item>
<item>
<widget class="QProgressBar" name="wifiProgressBar">
<property name="value">
<number>95</number>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_3">
<item>
<widget class="QLabel" name="BatteryLabel">
<property name="text">
<string>Battery</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</item>
<item>
<widget class="QProgressBar" name="BatteryPB">
<property name="value">
<number>100</number>
</property>
<property name="textDirection">
<enum>QProgressBar::TopToBottom</enum>
</property>
</widget>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</item>
<item>
<layout class="QHBoxLayout" name="horizontalLayout_4">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<layout class="QVBoxLayout" name="verticalLayout">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<widget class="MainGlWidget" name="MainScreen" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Expanding">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>640</width>
<height>480</height>
</size>
</property>
<property name="cursor">
<cursorShape>OpenHandCursor</cursorShape>
</property>
</widget>
</item>
</layout>
</item>
<item>
<layout class="QVBoxLayout" name="verticalLayout_2">
<property name="sizeConstraint">
<enum>QLayout::SetDefaultConstraint</enum>
</property>
<item>
<widget class="SideGlWidget" name="widget" native="true">
<property name="sizePolicy">
<sizepolicy hsizetype="Preferred" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>120</width>
<height>120</height>
</size>
</property>
<property name="maximumSize">
<size>
<width>50000</width>
<height>50000</height>
</size>
</property>
</widget>
</item>
<item>
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
</layout>
</item>
</layout>
</item>
</layout>
</widget>
<layoutdefault spacing="6" margin="11"/>
<customwidgets>
<customwidget>
<class>MainGlWidget</class>
<extends>QWidget</extends>
<header>MainGlWidget.h</header>
<container>1</container>
<slots>
<slot>setXRotation(int)</slot>
<slot>setZRotation(int)</slot>
<slot>setYRotation(int)</slot>
</slots>
</customwidget>
<customwidget>
<class>SideGlWidget</class>
<extends>QWidget</extends>
<header>SideGlWidget.h</header>
<container>1</container>
</customwidget>
</customwidgets>
<resources/>
<connections/>
</ui>
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