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Qt编写自定义控件48-面板窗体控件
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一、前言
很多时候需要有一个控件，能够替代容器控件，自动容纳多个widget，自适应宽高，然后提供滚动条功能，这就必然需要用到QScrollArea控件，可设置各个子面板的间距等，也在很多系统中用到，比如温湿度设备面板，有几百个温湿度设备，需要一个容器放置，自动产生滚动条，可以设置面板的固定宽高或者自适应拉伸，其实就是放了表格布局+弹簧来设置。
在后期的Qt内置控件的研究过程中，发现QListWidget也提供了类似的功能，所以后期有部分应用场景直接采用QListWidget来做。
二、实现的功能- 1:可设置标题栏文字/高度/字体/对齐方式/颜色
- 2:可设置边框宽度/边框圆角角度/边框颜色
- 3:可设置报警颜色切换间隔/报警加深颜色/报警普通颜色
- 4:可设置启用状态和禁用状态时文字和边框颜色
三、效果图
四、头文件代码
#ifndef PANELFRAME_H
#define PANELFRAME_H/**
* 面板区域控件 作者:feiyangqingyun(QQ:517216493) 2017-10-21
* 1:可设置标题栏文字/高度/字体/对齐方式/颜色
* 2:可设置边框宽度/边框圆角角度/边框颜色
* 3:可设置报警颜色切换间隔/报警加深颜色/报警普通颜色
* 4:可设置启用状态和禁用状态时文字和边框颜色
*/#include <QWidget>class QTimer;#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endifclass QDESIGNER_WIDGET_EXPORT PanelItem : public QWidget
#else
class PanelItem : public QWidget
#endif{
Q_OBJECT
Q_ENUMS(Alignment) Q_PROPERTY(int titleHeight READ getTitleHeight WRITE setTitleHeight)
Q_PROPERTY(QString titleText READ getTitleText WRITE setTitleText)
Q_PROPERTY(QFont titleFont READ getTitleFont WRITE setTitleFont)
Q_PROPERTY(Alignment titleAlignment READ getTitleAlignment WRITE setTitleAlignment)
Q_PROPERTY(QColor titleColor READ getTitleColor WRITE setTitleColor)
Q_PROPERTY(QColor titleDisableColor READ getTitleDisableColor WRITE setTitleDisableColor) Q_PROPERTY(int borderWidth READ getBorderWidth WRITE setBorderWidth)
Q_PROPERTY(int borderRadius READ getBorderRadius WRITE setBorderRadius)
Q_PROPERTY(QColor borderColor READ getBorderColor WRITE setBorderColor)
Q_PROPERTY(QColor borderDisableColor READ getBorderDisableColor WRITE setBorderDisableColor) Q_PROPERTY(int alarmInterval READ getAlarmInterval WRITE setAlarmInterval)
Q_PROPERTY(QColor alarmTextColor READ getAlarmTextColor WRITE setAlarmTextColor)
Q_PROPERTY(QColor alarmDarkColor READ getAlarmDarkColor WRITE setAlarmDarkColor)
Q_PROPERTY(QColor alarmNormalColor READ getAlarmNormalColor WRITE setAlarmNormalColor) Q_PROPERTY(bool isAlarm READ getIsAlarm WRITE setAlarm)
Q_PROPERTY(bool isEnable READ getIsEnable WRITE setEnable)public:
enum Alignment {
Alignment_Left = 0, //左对齐
Alignment_Center = 1, //居中对齐
Alignment_Right = 2 //右对齐
}; explicit PanelItem(QWidget *parent = 0);
~PanelItem();protected:
void paintEvent(QPaintEvent *);
void drawBorder(QPainter *painter);
void drawTitle(QPainter *painter);private:
int titleHeight; //标题高度
QString titleText; //标题文字
QFont titleFont; //标题字体
Alignment titleAlignment; //标题对齐方式
QColor titleColor; //标题颜色
QColor titleDisableColor; //禁用状态下文字颜色 int borderWidth; //边框宽度
int borderRadius; //边框圆角角度
QColor borderColor; //边框颜色
QColor borderDisableColor; //禁用状态下边框颜色 int alarmInterval; //报警切换间隔
QColor alarmTextColor; //报警文字颜色
QColor alarmDarkColor; //报警加深颜色
QColor alarmNormalColor; //报警普通颜色 bool isAlarm; //是否报警
bool isEnable; //是否启用 bool isDark; //是否加深
QColor tempColor; //临时颜色
QTimer *timer; //报警切换定时器public:
int getTitleHeight() const;
QString getTitleText() const;
QFont getTitleFont() const;
Alignment getTitleAlignment() const;
QColor getTitleColor() const;
QColor getTitleDisableColor() const; int getBorderWidth() const;
int getBorderRadius() const;
QColor getBorderColor() const;
QColor getBorderDisableColor() const; int getAlarmInterval() const;
QColor getAlarmTextColor() const;
QColor getAlarmDarkColor() const;
QColor getAlarmNormalColor() const; bool getIsAlarm() const;
bool getIsEnable() const; QSize sizeHint() const;
QSize minimumSizeHint() const;private slots:
void checkAlarm();public Q_SLOTS:
//设置报警状态
void setAlarm(bool alarm);
//设置启用状态
void setEnable(bool enable); //设置标题栏高度
void setTitleHeight(int titleHeight);
//设置标题文字
void setTitleText(const QString &titleText);
//设置标题字体
void setTitleFont(const QFont &titleFont);
//设置标题文字对齐方式
void setTitleAlignment(const Alignment &titleAlignment);
//设置标题文字颜色
void setTitleColor(const QColor &titleColor);
//设置禁用状态下标题文字颜色
void setTitleDisableColor(const QColor &titleDisableColor); //设置边框宽度
void setBorderWidth(int borderWidth);
//设置边框圆角角度
void setBorderRadius(int borderRadius);
//设置边框颜色
void setBorderColor(const QColor &borderColor);
//设置禁用状态下边框颜色
void setBorderDisableColor(const QColor &borderDisableColor); //设置报警切换间隔
void setAlarmInterval(int alarmInterval);
//设置报警文字颜色
void setAlarmTextColor(const QColor &alarmTextColor);
//设置报警加深颜色
void setAlarmDarkColor(const QColor &alarmDarkColor);
//设置报警普通颜色
void setAlarmNormalColor(const QColor &alarmNormalColor);};#endif // PANELFRAME_H
五、核心代码
void PanelItem::paintEvent(QPaintEvent *)
{
//绘制准备工作,启用反锯齿
QPainter painter(this);
painter.setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing); //绘制边框
drawBorder(&painter);
//绘制标题
drawTitle(&painter);
}void PanelItem::drawBorder(QPainter *painter)
{
if (borderWidth <= 0) {
return;
} painter->save(); QPen pen;
pen.setWidth(borderWidth);
pen.setColor(tempColor); painter->setPen(pen);
painter->setBrush(Qt::NoBrush);
QRect rect(borderWidth / 2, borderWidth / 2, width() - borderWidth, height() - borderWidth);
painter->drawRoundedRect(rect, borderRadius, borderRadius); painter->restore();
}void PanelItem::drawTitle(QPainter *painter)
{
painter->save(); painter->setPen(Qt::NoPen);
painter->setBrush(tempColor); int offset = borderWidth - borderWidth / 3;
QRect rect(offset, offset, width() - offset * 2, titleHeight);
painter->drawRect(rect); //绘制标题文字
if (isEnable) {
painter->setPen(isAlarm ? alarmTextColor : titleColor);
} else {
painter->setPen(titleDisableColor);
} painter->setFont(titleFont); //文字区域要重新计算
offset = borderWidth * 3;
QRect textRect(offset, 0, width() - offset * 2, titleHeight); Qt::Alignment align;
if (titleAlignment == Alignment_Left) {
align = Qt::AlignLeft | Qt::AlignVCenter;
} else if (titleAlignment == Alignment_Center) {
align = Qt::AlignHCenter | Qt::AlignVCenter;
} else if (titleAlignment == Alignment_Right) {
align = Qt::AlignRight | Qt::AlignVCenter;
} painter->drawText(textRect, align, titleText); painter->restore();
}
