QT内置的ICON资源保存在QStyle类里。
可以通过成员函数
QStyle::standardIcon
来获取。
保存的icon有：
enum QStyle::StandardPixmap
This enum describes the available standard pixmaps. A standard pixmap is a pixmap that can follow some existing GUI style or guideline.
| Constant | Value | Description |
|---|---|---|
| QStyle::SP_TitleBarMinButton | 1 | Minimize button on title bars (e.g., in QMdiSubWindow). |
| QStyle::SP_TitleBarMenuButton | 0 | Menu button on a title bar. |
| QStyle::SP_TitleBarMaxButton | 2 | Maximize button on title bars. |
| QStyle::SP_TitleBarCloseButton | 3 | Close button on title bars. |
| QStyle::SP_TitleBarNormalButton | 4 | Normal (restore) button on title bars. |
| QStyle::SP_TitleBarShadeButton | 5 | Shade button on title bars. |
| QStyle::SP_TitleBarUnshadeButton | 6 | Unshade button on title bars. |
| QStyle::SP_TitleBarContextHelpButton | 7 | The Context help button on title bars. |
| QStyle::SP_MessageBoxInformation | 9 | The "information" icon. |
| QStyle::SP_MessageBoxWarning | 10 | The "warning" icon. |
| QStyle::SP_MessageBoxCritical | 11 | The "critical" icon. |
| QStyle::SP_MessageBoxQuestion | 12 | The "question" icon. |
| QStyle::SP_DesktopIcon | 13 | The "desktop" icon. |
| QStyle::SP_TrashIcon | 14 | The "trash" icon. |
| QStyle::SP_ComputerIcon | 15 | The "My computer" icon. |
| QStyle::SP_DriveFDIcon | 16 | The floppy icon. |
| QStyle::SP_DriveHDIcon | 17 | The harddrive icon. |
| QStyle::SP_DriveCDIcon | 18 | The CD icon. |
| QStyle::SP_DriveDVDIcon | 19 | The DVD icon. |
| QStyle::SP_DriveNetIcon | 20 | The network icon. |
| QStyle::SP_DirHomeIcon | 55 | The home directory icon. |
| QStyle::SP_DirOpenIcon | 21 | The open directory icon. |
| QStyle::SP_DirClosedIcon | 22 | The closed directory icon. |
| QStyle::SP_DirIcon | 37 | The directory icon. |
| QStyle::SP_DirLinkIcon | 23 | The link to directory icon. |
| QStyle::SP_FileIcon | 24 | The file icon. |
| QStyle::SP_FileLinkIcon | 25 | The link to file icon. |
| QStyle::SP_FileDialogStart | 28 | The "start" icon in a file dialog. |
| QStyle::SP_FileDialogEnd | 29 | The "end" icon in a file dialog. |
| QStyle::SP_FileDialogToParent | 30 | The "parent directory" icon in a file dialog. |
| QStyle::SP_FileDialogNewFolder | 31 | The "create new folder" icon in a file dialog. |
| QStyle::SP_FileDialogDetailedView | 32 | The detailed view icon in a file dialog. |
| QStyle::SP_FileDialogInfoView | 33 | The file info icon in a file dialog. |
| QStyle::SP_FileDialogContentsView | 34 | The contents view icon in a file dialog. |
| QStyle::SP_FileDialogListView | 35 | The list view icon in a file dialog. |
| QStyle::SP_FileDialogBack | 36 | The back arrow in a file dialog. |
| QStyle::SP_DockWidgetCloseButton | 8 | Close button on dock windows (see also QDockWidget). |
| QStyle::SP_ToolBarHorizontalExtensionButton | 26 | Extension button for horizontal toolbars. |
| QStyle::SP_ToolBarVerticalExtensionButton | 27 | Extension button for vertical toolbars. |
| QStyle::SP_DialogOkButton | 38 | Icon for a standard OK button in a QDialogButtonBox. |
| QStyle::SP_DialogCancelButton | 39 | Icon for a standard Cancel button in a QDialogButtonBox. |
| QStyle::SP_DialogHelpButton | 40 | Icon for a standard Help button in a QDialogButtonBox. |
| QStyle::SP_DialogOpenButton | 41 | Icon for a standard Open button in a QDialogButtonBox. |
| QStyle::SP_DialogSaveButton | 42 | Icon for a standard Save button in a QDialogButtonBox. |
| QStyle::SP_DialogCloseButton | 43 | Icon for a standard Close button in a QDialogButtonBox. |
| QStyle::SP_DialogApplyButton | 44 | Icon for a standard Apply button in a QDialogButtonBox. |
| QStyle::SP_DialogResetButton | 45 | Icon for a standard Reset button in a QDialogButtonBox. |
| QStyle::SP_DialogDiscardButton | 46 | Icon for a standard Discard button in a QDialogButtonBox. |
| QStyle::SP_DialogYesButton | 47 | Icon for a standard Yes button in a QDialogButtonBox. |
| QStyle::SP_DialogNoButton | 48 | Icon for a standard No button in a QDialogButtonBox. |
| QStyle::SP_ArrowUp | 49 | Icon arrow pointing up. |
| QStyle::SP_ArrowDown | 50 | Icon arrow pointing down. |
| QStyle::SP_ArrowLeft | 51 | Icon arrow pointing left. |
| QStyle::SP_ArrowRight | 52 | Icon arrow pointing right. |
| QStyle::SP_ArrowBack | 53 | Equivalent to SP_ArrowLeft when the current layout direction isQt::LeftToRight, otherwise SP_ArrowRight. |
| QStyle::SP_ArrowForward | 54 | Equivalent to SP_ArrowRight when the current layout direction isQt::LeftToRight, otherwise SP_ArrowLeft. |
| QStyle::SP_CommandLink | 56 | Icon used to indicate a Vista style command link glyph. |
| QStyle::SP_VistaShield | 57 | Icon used to indicate UAC prompts on Windows Vista. This will return a null pixmap or icon on all other platforms. |
| QStyle::SP_BrowserReload | 58 | Icon indicating that the current page should be reloaded. |
| QStyle::SP_BrowserStop | 59 | Icon indicating that the page loading should stop. |
| QStyle::SP_MediaPlay | 60 | Icon indicating that media should begin playback. |
| QStyle::SP_MediaStop | 61 | Icon indicating that media should stop playback. |
| QStyle::SP_MediaPause | 62 | Icon indicating that media should pause playback. |
| QStyle::SP_MediaSkipForward | 63 | Icon indicating that media should skip forward. |
| QStyle::SP_MediaSkipBackward | 64 | Icon indicating that media should skip backward. |
| QStyle::SP_MediaSeekForward | 65 | Icon indicating that media should seek forward. |
| QStyle::SP_MediaSeekBackward | 66 | Icon indicating that media should seek backward. |
| QStyle::SP_MediaVolume | 67 | Icon indicating a volume control. |
| QStyle::SP_MediaVolumeMuted | 68 | Icon indicating a muted volume control. |
| QStyle::SP_CustomBase | 0xf0000000 | Base value for custom standard pixmaps; custom values must be greater than this value. |
http://doc.qt.io/qt-4.8/qstyle.html