Qtリファレンス QCoreApplication::setAttributeのソースを表示新しいページはコチラ

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== '''QCoreApplication::setAttribute 概要''' ==
　Qt5.15.2

　QtApplicationへのアプリケーション単位で設定できる内容について固有の番号を使って設定ます。通常は定義済のQtキーワードで数値を設定します。
　
*<span style = "background:linear-gradient(transparent 75%, #ffbf7f 75%); font-weight:bold; "><span style="color:deeppink;">void</span> <span style="color:blue;">QtApplication::setAttribute</span>(<span style="color:deeppink;">(Qt::ApplicationAttribute </span>attribute);</span>


例
*<span style = "background:linear-gradient(transparent 75%, #ffbf7f 75%); font-weight:bold; "><span style="color:blue;">QtApplication::setAttribute</span>(Qt::AA_UseHighDpiPixmaps);</span>
*<span style = "background:linear-gradient(transparent 75%, #ffbf7f 75%); font-weight:bold; "><span style="color:blue;">QtApplication::setAttribute</span>(Qt::AA_EnableHighDpiScaling);</span>


　QCoreApplicationクラスからでもQtApplicationからでも使える実体が無くても呼び出せる静的メンバ関数です。なぜならQtApplicationクラスはQtGuiApplicationを継承していて、更にQtGuiApplicationはQCoreApplicationを経由しています。QCoreにあるメンバ関数は、QtApplicationでもオーバーライドされる関数でなければ使える感じです。


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"<table border=1><tr><td align=center>Value</td><td align=center>Constant</td><td align=center>Description</td></tr>
<tr><td align=center>2</td><td align=center>Qt::AA_DontShowIconsInMenus</td><td align=center></td></tr>
<tr><td align=center>28</td><td align=center>Qt::AA_DontShowShortcutsInContextMenus</td><td align=center></td></tr>
<tr><td align=center>3</td><td align=center>Qt::AA_NativeWindows</td><td align=center></td></tr>
<tr><td align=center>4</td><td align=center>Qt::AA_DontCreateNativeWidgetSiblings</td><td align=center></td></tr>
<tr><td align=center>5</td><td align=center>Qt::AA_PluginApplication</td><td align=center></td></tr>
<tr><td align=center>6</td><td align=center>Qt::AA_DontUseNativeMenuBar</td><td align=center></td></tr>
<tr><td align=center>7</td><td align=center>Qt::AA_MacDontSwapCtrlAndMeta</td><td align=center></td></tr>
<tr><td align=center>8</td><td align=center>Qt::AA_Use96Dpi</td><td align=center></td></tr>
<tr><td align=center>11</td><td align=center>Qt::AA_SynthesizeTouchForUnhandledMouseEvents</td><td align=center></td></tr>
<tr><td align=center>12</td><td align=center>Qt::AA_SynthesizeMouseForUnhandledTouchEvents</td><td align=center></td></tr>
<tr><td align=center>13</td><td align=center>Qt::AA_UseHighDpiPixmaps</td><td align=center></td></tr>
<tr><td align=center>14</td><td align=center>Qt::AA_ForceRasterWidgets</td><td align=center></td></tr>
<tr><td align=center>15</td><td align=center>Qt::AA_UseDesktopOpenGL</td><td align=center></td></tr>
<tr><td align=center>16</td><td align=center>Qt::AA_UseOpenGLES</td><td align=center></td></tr>
<tr><td align=center>17</td><td align=center>Qt::AA_UseSoftwareOpenGL</td><td align=center></td></tr>
<tr><td align=center>18</td><td align=center>Qt::AA_ShareOpenGLContexts</td><td align=center></td></tr>
<tr><td align=center>19</td><td align=center>Qt::AA_SetPalette</td><td align=center></td></tr>
<tr><td align=center>20</td><td align=center>Qt::AA_EnableHighDpiScaling</td><td align=center></td></tr>
<tr><td align=center>21</td><td align=center>Qt::AA_DisableHighDpiScaling</td><td align=center></td></tr>
<tr><td align=center>22</td><td align=center>Qt::AA_UseStyleSheetPropagationInWidgetStyles</td><td align=center></td></tr>
<tr><td align=center>23</td><td align=center>Qt::AA_DontUseNativeDialogs</td><td align=center></td></tr>
<tr><td align=center>24</td><td align=center>Qt::AA_SynthesizeMouseForUnhandledTabletEvents</td><td align=center></td></tr>
<tr><td align=center>25</td><td align=center>Qt::AA_CompressHighFrequencyEvents</td><td align=center></td></tr>
<tr><td align=center>29</td><td align=center>Qt::AA_CompressTabletEvents</td><td align=center></td></tr>
<tr><td align=center>26</td><td align=center>Qt::AA_DontCheckOpenGLContextThreadAffinity</td><td align=center></td></tr>
<tr><td align=center>27</td><td align=center>Qt::AA_DisableShaderDiskCache</td><td align=center></td></tr>
<tr><td align=center>30</td><td align=center>Qt::AA_DisableWindowContextHelpButton</td><td align=center></td></tr>
<tr><td align=center>31</td><td align=center>Qt::AA_DisableSessionManager</td><td align=center></td></tr>
<tr><td align=center>9</td><td align=center>Qt::AA_DisableNativeVirtualKeyboard</td><td align=center></td></tr>
</table>"

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