Как в Qt задать картинку в виде фона интерфейса

Question

МихаилллApril 30, 2019, 4:54 p.m.

Как в Qt задать картинку в виде фона интерфейса

Добрый день.
Как задать картинку в виде фона интерфейса?
Пробовал так, но не заработало:

QPixmap background("D:\\QTProject\\vedaEMailClient\\vedaEMailClient\\Images\\splash-background.png");
    QImage background2("D:\\QTProject\\vedaEMailClient\\vedaEMailClient\\Images\\splash-background.png");
    //QPixmap background(":/Images/Images/splash-background.png");
    background.scaled(this->size(), Qt::IgnoreAspectRatio);
    QPalette palette;
    palette.setBrush(QPalette::Background, background2);
    this->setPalette(palette);

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April 30, 2019, 5:30 p.m.
(edited)

Вот так работает, но остается белая рамочка вокруг окна и не окрашенный прямоугольник сверху.
Скажите пожалуйста, в чем может быть дело и как это исправить?

QPalette Pal(palette());
    QImage background2(":/Images/Images/splash-background.png");
    Pal.setBrush(QPalette::Background, background2);
    this->setAutoFillBackground(true);
    this->setPalette(Pal);

вот код страницы

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>begin</class>
 <widget class="QWidget" name="begin">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>800</width>
    <height>681</height>
   </rect>
  </property>
  <property name="minimumSize">
   <size>
    <width>800</width>
    <height>600</height>
   </size>
  </property>
  <property name="windowTitle">
   <string>Form</string>
  </property>
  <layout class="QGridLayout" name="gridLayout">
   <item row="2" column="0">
    <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,1,1">
     <item>
      <spacer name="horizontalSpacer">
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
       <property name="sizeHint" stdset="0">
        <size>
         <width>40</width>
         <height>20</height>
        </size>
       </property>
      </spacer>
     </item>
     <item>
      <widget class="QWidget" name="widget" native="true">
       <layout class="QGridLayout" name="gridLayout_2">
        <item row="0" column="0">
         <layout class="QVBoxLayout" name="verticalLayout_5" stretch="1,1">
          <item>
           <layout class="QVBoxLayout" name="verticalLayout_3">
            <item>
             <spacer name="verticalSpacer_3">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>20</width>
                <height>40</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLineEdit" name="login_lineEdit">
              <property name="minimumSize">
               <size>
                <width>0</width>
                <height>40</height>
               </size>
              </property>
              <property name="placeholderText">
               <string>login</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="verticalSpacer_4">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>20</width>
                <height>40</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLineEdit" name="password_lineEdit">
              <property name="minimumSize">
               <size>
                <width>0</width>
                <height>40</height>
               </size>
              </property>
              <property name="placeholderText">
               <string>password</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="verticalSpacer_5">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>20</width>
                <height>40</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <widget class="QLineEdit" name="secret_lineEdit">
              <property name="minimumSize">
               <size>
                <width>0</width>
                <height>40</height>
               </size>
              </property>
              <property name="placeholderText">
               <string>secret phrase</string>
              </property>
             </widget>
            </item>
            <item>
             <spacer name="verticalSpacer_6">
              <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>
          <item>
           <layout class="QVBoxLayout" name="verticalLayout_4">
            <item>
             <spacer name="verticalSpacer_7">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>231</width>
                <height>13</height>
               </size>
              </property>
             </spacer>
            </item>
            <item>
             <layout class="QVBoxLayout" name="verticalLayout_2">
              <item>
               <layout class="QHBoxLayout" name="horizontalLayout_3">
                <item>
                 <spacer name="horizontalSpacer_3">
                  <property name="orientation">
                   <enum>Qt::Horizontal</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>40</width>
                    <height>20</height>
                   </size>
                  </property>
                 </spacer>
                </item>
                <item>
                 <widget class="QPushButton" name="signIn_Button">
                  <property name="minimumSize">
                   <size>
                    <width>200</width>
                    <height>70</height>
                   </size>
                  </property>
                  <property name="maximumSize">
                   <size>
                    <width>200</width>
                    <height>16777215</height>
                   </size>
                  </property>
                  <property name="text">
                   <string>Sign in</string>
                  </property>
                 </widget>
                </item>
                <item>
                 <spacer name="horizontalSpacer_4">
                  <property name="orientation">
                   <enum>Qt::Horizontal</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>40</width>
                    <height>20</height>
                   </size>
                  </property>
                 </spacer>
                </item>
               </layout>
              </item>
              <item>
               <spacer name="verticalSpacer_8">
                <property name="orientation">
                 <enum>Qt::Vertical</enum>
                </property>
                <property name="sizeHint" stdset="0">
                 <size>
                  <width>231</width>
                  <height>13</height>
                 </size>
                </property>
               </spacer>
              </item>
              <item>
               <layout class="QHBoxLayout" name="horizontalLayout_2">
                <item>
                 <spacer name="horizontalSpacer_5">
                  <property name="orientation">
                   <enum>Qt::Horizontal</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>40</width>
                    <height>20</height>
                   </size>
                  </property>
                 </spacer>
                </item>
                <item>
                 <widget class="QPushButton" name="register_Button">
                  <property name="minimumSize">
                   <size>
                    <width>200</width>
                    <height>70</height>
                   </size>
                  </property>
                  <property name="maximumSize">
                   <size>
                    <width>200</width>
                    <height>16777215</height>
                   </size>
                  </property>
                  <property name="text">
                   <string>Register</string>
                  </property>
                 </widget>
                </item>
                <item>
                 <spacer name="horizontalSpacer_6">
                  <property name="orientation">
                   <enum>Qt::Horizontal</enum>
                  </property>
                  <property name="sizeHint" stdset="0">
                   <size>
                    <width>40</width>
                    <height>20</height>
                   </size>
                  </property>
                 </spacer>
                </item>
               </layout>
              </item>
             </layout>
            </item>
            <item>
             <spacer name="verticalSpacer_9">
              <property name="orientation">
               <enum>Qt::Vertical</enum>
              </property>
              <property name="sizeHint" stdset="0">
               <size>
                <width>231</width>
                <height>13</height>
               </size>
              </property>
             </spacer>
            </item>
           </layout>
          </item>
         </layout>
        </item>
       </layout>
      </widget>
     </item>
     <item>
      <spacer name="horizontalSpacer_2">
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
       <property name="sizeHint" stdset="0">
        <size>
         <width>40</width>
         <height>20</height>
        </size>
       </property>
      </spacer>
     </item>
    </layout>
   </item>
   <item row="1" column="0">
    <layout class="QHBoxLayout" name="horizontalLayout_4">
     <item>
      <spacer name="horizontalSpacer_7">
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
       <property name="sizeHint" stdset="0">
        <size>
         <width>40</width>
         <height>20</height>
        </size>
       </property>
      </spacer>
     </item>
     <item>
      <widget class="QLabel" name="labe1PageBegin">
       <property name="text">
        <string>TextLabel</string>
       </property>
      </widget>
     </item>
     <item>
      <spacer name="horizontalSpacer_8">
       <property name="orientation">
        <enum>Qt::Horizontal</enum>
       </property>
       <property name="sizeHint" stdset="0">
        <size>
         <width>40</width>
         <height>20</height>
        </size>
       </property>
      </spacer>
     </item>
    </layout>
   </item>
   <item row="3" column="0">
    <spacer name="verticalSpacer_2">
     <property name="orientation">
      <enum>Qt::Vertical</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>20</width>
       <height>30</height>
      </size>
     </property>
    </spacer>
   </item>
   <item row="0" column="0">
    <spacer name="verticalSpacer">
     <property name="orientation">
      <enum>Qt::Vertical</enum>
     </property>
     <property name="sizeHint" stdset="0">
      <size>
       <width>20</width>
       <height>30</height>
      </size>
     </property>
    </spacer>
   </item>
  </layout>
 </widget>
 <resources/>
 <connections/>
</ui>

Evgenii Legotckoi → Михаиллл
#

April 30, 2019, 5:37 p.m.

Добрый день!

Там скорее всего в дизайнере для Layout нужно margins выставить.

Либо через setStyleSheet установить нулевые padding

setStyleSheet("QWidget { padding: 3px }");

Но осторожнее, может примениться на все child виджеты.

April 30, 2019, 5:47 p.m.
(edited)

Написал так и картинка перестала отображаться.
В дизайнере пробовал менять margins, но ничего не поменялось.

April 30, 2019, 5:57 p.m.
The answer was marked as a solution.

Попробовал сделать в новом тестовом окне, там все прекрасно.
Похоже касяк где то в .ui

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