liudianwu |
2017-12-24 11:49 |
Qt编写导航按钮
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 */
[attachment=19090] [attachment=19369]
[attachment=18353] 本人有代码洁癖症,写代码处处讲究对称完美。如下图所示。 [attachment=18354] [attachment=18355] 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(); }
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