-
UID：110085
-
- 注册时间2010-12-21
- 最后登录2025-05-03
- 在线时间3562小时
-
- 发帖2828
- 搜Ta的帖子
- 精华2
- 金钱33944
- 威望3492
- 贡献值624
- 好评度3512
-
访问TA的空间加好友用道具
|
做各种各样的 界面的时候，经常需要做一排 按钮用于切换到对应界面，俗称导航按钮或者导航菜单，参照过各种各样的主界面导航 布局，特意编写导航按钮自定义控件，结合各种情况，继承自QPushButton。已集成在QUC自定义控件中。 作品已在另外一篇帖子开源，请见http://www.qtcn.org/bbs/read-htm-tid-66098.html - /**
- * 导航按钮控件 作者:feiyangqingyun(QQ:517216493) 2017-12-19
- * 1:可设置文字的左侧+右侧+顶部+底部间隔
- * 2:可设置文字对齐方式
- * 3:可设置显示倒三角/倒三角边长/倒三角位置/倒三角颜色
- * 4:可设置显示图标/图标间隔/图标尺寸/正常状态图标/悬停状态图标/选中状态图标
- * 5:可设置显示边框线条/线条宽度/线条间隔/线条位置/线条颜色
- * 6:可设置正常背景颜色/悬停背景颜色/选中背景颜色
- * 7:可设置正常文字颜色/悬停文字颜色/选中文字颜色
- * 8:可设置背景颜色为画刷颜色
- */
   本人有代码洁癖症，写代码处处讲究对称完美。如下图所示。   主要代码： - void NavButton::paintEvent(QPaintEvent *)
- {
- //绘制准备工作,启用反锯齿
- QPainter painter(this);
- painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
- //绘制背景
- drawBg(&painter);
- //绘制文字
- drawText(&painter);
- //绘制图标
- drawIcon(&painter);
- //绘制边框线条
- drawLine(&painter);
- //绘制右侧倒三角
- drawTriangle(&painter);
- }
- void NavButton::drawBg(QPainter *painter)
- {
- painter->save();
- painter->setPen(Qt::NoPen);
- int width = this->width();
- int height = this->height();
- QRect bgRect;
- if (linePosition == LinePosition_Left) {
- bgRect = QRect(lineSpace, 0, width - lineSpace, height);
- } else if (linePosition == LinePosition_Right) {
- bgRect = QRect(0, 0, width - lineSpace, height);
- } else if (linePosition == LinePosition_Top) {
- bgRect = QRect(0, lineSpace, width, height - lineSpace);
- } else if (linePosition == LinePosition_Bottom) {
- bgRect = QRect(0, 0, width, height - lineSpace);
- }
- //如果画刷存在则取画刷
- QBrush bgBrush;
- if (isChecked()) {
- bgBrush = checkBgBrush;
- } else if (hover) {
- bgBrush = hoverBgBrush;
- } else {
- bgBrush = normalBgBrush;
- }
- if (bgBrush != Qt::NoBrush) {
- painter->setBrush(bgBrush);
- } else {
- //根据当前状态选择对应颜色
- QColor bgColor;
- if (isChecked()) {
- bgColor = checkBgColor;
- } else if (hover) {
- bgColor = hoverBgColor;
- } else {
- bgColor = normalBgColor;
- }
- painter->setBrush(bgColor);
- }
- painter->drawRect(bgRect);
- painter->restore();
- }
- void NavButton::drawText(QPainter *painter)
- {
- painter->save();
- painter->setBrush(Qt::NoBrush);
- //根据当前状态选择对应颜色
- QColor textColor;
- if (isChecked()) {
- textColor = checkTextColor;
- } else if (hover) {
- textColor = hoverTextColor;
- } else {
- textColor = normalTextColor;
- }
- QRect textRect = QRect(paddingLeft, paddingTop, width() - paddingLeft - paddingRight, height() - paddingTop - paddingBottom);
- painter->setPen(textColor);
- painter->drawText(textRect, textAlign | Qt::AlignVCenter, text());
- painter->restore();
- }
- void NavButton::drawIcon(QPainter *painter)
- {
- if (!showIcon) {
- return;
- }
- painter->save();
- QPixmap pix;
- if (isChecked()) {
- pix = iconCheck;
- } else if (hover) {
- pix = iconHover;
- } else {
- pix = iconNormal;
- }
- if (!pix.isNull()) {
- //等比例平滑缩放图标
- pix = pix.scaled(iconSize, Qt::KeepAspectRatio, Qt::SmoothTransformation);
- painter->drawPixmap(iconSpace, (height() - iconSize.height()) / 2, pix);
- }
- painter->restore();
- }
- void NavButton::drawLine(QPainter *painter)
- {
- if (!showLine) {
- return;
- }
- if (!isChecked()) {
- return;
- }
- painter->save();
- QPen pen;
- pen.setWidth(lineWidth);
- pen.setColor(lineColor);
- painter->setPen(pen);
- //根据线条位置设置线条坐标
- QPoint pointStart, pointEnd;
- if (linePosition == LinePosition_Left) {
- pointStart = QPoint(0, 0);
- pointEnd = QPoint(0, height());
- } else if (linePosition == LinePosition_Right) {
- pointStart = QPoint(width(), 0);
- pointEnd = QPoint(width(), height());
- } else if (linePosition == LinePosition_Top) {
- pointStart = QPoint(0, 0);
- pointEnd = QPoint(width(), 0);
- } else if (linePosition == LinePosition_Bottom) {
- pointStart = QPoint(0, height());
- pointEnd = QPoint(width(), height());
- }
- painter->drawLine(pointStart, pointEnd);
- painter->restore();
- }
- void NavButton::drawTriangle(QPainter *painter)
- {
- if (!showTriangle) {
- return;
- }
- //选中或者悬停显示
- if (!hover && !isChecked()) {
- return;
- }
- painter->save();
- painter->setPen(Qt::NoPen);
- painter->setBrush(triangleColor);
- //绘制在右侧中间,根据设定的倒三角的边长设定三个点位置
- int width = this->width();
- int height = this->height();
- int midWidth = width / 2;
- int midHeight = height / 2;
- QPolygon pts;
- if (trianglePosition == TrianglePosition_Left) {
- pts.setPoints(3, triangleLen, midHeight, 0, midHeight - triangleLen, 0, midHeight + triangleLen);
- } else if (trianglePosition == TrianglePosition_Right) {
- pts.setPoints(3, width - triangleLen, midHeight, width, midHeight - triangleLen, width, midHeight + triangleLen);
- } else if (trianglePosition == TrianglePosition_Top) {
- pts.setPoints(3, midWidth, triangleLen, midWidth - triangleLen, 0, midWidth + triangleLen, 0);
- } else if (trianglePosition == TrianglePosition_Bottom) {
- pts.setPoints(3, midWidth, height - triangleLen, midWidth - triangleLen, height, midWidth + triangleLen, height);
- }
- painter->drawPolygon(pts);
- painter->restore();
- }
|
