QPaint QPushButton

最新推荐文章于 2024-04-07 21:27:50 发布

原创最新推荐文章于 2024-04-07 21:27:50 发布 · 606 阅读

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本文介绍了一种使用Qt库来根据不同下载状态动态绘制按钮的方法。通过切换图标和按钮状态来反映当前的下载任务状态，如开始、暂停及鼠标悬停效果等。

case 4:
		{
			QPushButton * statusBtn;
			int status = index.model()->data(index,Qt::DisplayRole).toInt();
			QStyleOptionButton pushButtonOption;
			pushButtonOption.rect = QRect(option.rect.x(), option.rect.y()+((100 - 20)/2), 20,20);
			pushButtonOption.state |= QStyle::State_Enabled;
			pushButtonOption.direction = QApplication::layoutDirection();
			switch (status)
			{
			case DOWNLOAD_START:
				{
					pushButtonOption.state |=QStyle::State_None;
					pushButtonOption.icon = QIcon("play.png");
					statusBtn = startDownloadStatusBtn;
					break;
				}
			case DOWNLOAD_STOP:
				{
					pushButtonOption.state |=QStyle::State_None;
					pushButtonOption.icon = QIcon("pause.png");
					statusBtn = stopDownloadStatusBtn;
					break;
				}
			case DOWNLOAD_START_HOVER:
				{
					pushButtonOption.state |= QStyle::State_MouseOver;
					pushButtonOption.icon = QIcon("play_hover.png");
					statusBtn = startDownloadStatusBtn;
					break;
				}
			case DOWNLOAD_START_PRESSED:
				{
					pushButtonOption.state |= QStyle::State_Sunken;
					pushButtonOption.icon = QIcon("play_hover.png");
					statusBtn = startDownloadStatusBtn;
					break;
				}
			case DOWNLOAD_STOP_HOVER:
				{
					pushButtonOption.state |= QStyle::State_MouseOver;
					pushButtonOption.icon = QIcon("pause_hover.png");
					statusBtn = stopDownloadStatusBtn;
					break;
				}
			case DOWNLOAD_STOP_PRESSED:
				{
					pushButtonOption.state |= QStyle::State_Sunken;
					pushButtonOption.icon = QIcon("pause_hover.png");
					statusBtn = stopDownloadStatusBtn;
					break;
				}
			default:
				{
					break;
				}
			}
			pushButtonOption.iconSize = QSize(30, 30);
			QApplication::style()->drawControl(QStyle::CE_PushButton, &pushButtonOption, painter, statusBtn);
			break;
		}