先上程序运行图
这里显示数字，闪烁等都没有问题，唯一的问题就是这个速度指针的绘制问题，在代码中我使用的是用QPainter绘制image。锯齿好严重，这里我已经开了抗锯齿
painter.setRenderHint(QPainter::Antialiasing,true);
但是效果几乎没有，是操作不对，还是需要特殊设置了
剩下的就是分享代码了
首先就是这个指针的绘制代码
ui->label->setStyleSheet("border-image:url(:/source/beijing.bmp)"); ui->label->installEventFilter(this); image_pointer.load(":/source/222.png");
这里主要就是设置大背景，就是后面的那么最大的仪表界面，剩下的就是为这个要在Qlabel上面绘制指针，需要为QLabel注册绘制事件，否则程序会滤掉这个绘制事件
绘制指针代码
void Widget::painter_car() { QPainter painter(ui->label); painter.setRenderHint(QPainter::Antialiasing,true); painter.translate(960,360); painter.save(); painter.rotate(pointer_number); QRectF target(-40,-267.0,80.0,336.0); QRectF source(0.0,0.0,80.0,336.0); painter.drawImage(target,image_pointer,source); painter.restore(); }
这里新建Qpainter继承值Qlabel
设置开抗锯齿，几乎没有效果，我都怀疑执行了没有
移动Qpainter 的原始坐标点
完了就是简单的绘制 ，
剩下的就是数字仪表的显示
这里我新建了一个专门显示数字的界面
这个几面来负责显示七位数字
数字显示源代码：
头文件
#ifndef NUMBER_H #define NUMBER_H #include <QWidget> namespace Ui { class Number; } class Number : public QWidget { Q_OBJECT public: explicit Number(QWidget *parent = 0); ~Number(); void set_Number(int number); private: void set_image(int flag,int number); private: Ui::Number *ui; }; #endif // NUMBER_H
源文件
#include "number.h" #include "ui_number.h" #include <QDebug> Number::Number(QWidget *parent) : QWidget(parent), ui(new Ui::Number) { ui->setupUi(this); } Number::~Number() { delete ui; } void Number::set_Number(int number) { if(number==0) { set_image(1,0); } set_image(1,number%10); if(number/10>0) { set_image(2,number/10); } if(number/100>0) { set_image(3,number/100); } if(number/1000>0) { set_image(4,number/1000); } if(number/10000>0) { set_image(5,number/10000); } if(number/100000>0) { set_image(6,number/100000); } if(number/1000000>0) { set_image(7,number/1000000); } } void Number::set_image(int flag, int number) { switch (flag) { case 1: switch (number) { case 0: ui->label->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 2: switch (number) { case 0: ui->label_2->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_2->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_2->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_2->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_2->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_2->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_2->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_2->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_2->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_2->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 3: switch (number) { case 0: ui->label_3->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_3->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_3->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_3->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_3->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_3->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_3->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_3->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_3->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_3->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 4: switch (number) { case 0: ui->label_4->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_4->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_4->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_4->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_4->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_4->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_4->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_4->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_4->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_4->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 5: switch (number) { case 0: ui->label_5->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_5->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_5->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_5->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_5->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_5->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_5->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_5->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_5->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_5->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 6: switch (number) { case 0: ui->label_6->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_6->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_6->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_6->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_6->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_6->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_6->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_6->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_6->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_6->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; case 7: switch (number) { case 0: ui->label_7->setStyleSheet("border-image:url(:/source/0.png)"); break; case 1: ui->label_7->setStyleSheet("border-image:url(:/source/1.png)"); break; case 2: ui->label_7->setStyleSheet("border-image:url(:/source/2.png)"); break; case 3: ui->label_7->setStyleSheet("border-image:url(:/source/3.png)"); break; case 4: ui->label_7->setStyleSheet("border-image:url(:/source/4.png)"); break; case 5: ui->label_7->setStyleSheet("border-image:url(:/source/5.png)"); break; case 6: ui->label_7->setStyleSheet("border-image:url(:/source/6.png)"); break; case 7: ui->label_7->setStyleSheet("border-image:url(:/source/7.png)"); break; case 8: ui->label_7->setStyleSheet("border-image:url(:/source/8.png)"); break; case 9: ui->label_7->setStyleSheet("border-image:url(:/source/9.png)"); break; } break; } }
这里代码开着有点多，其实没有什么含量，说白了就是给七个QLabel换背景
使用情况
number_1 = new Number(ui->widget_1); number_1->resize(175,32); number_1->move(0,0); number_1->set_Number(temp); number_1->show(); number_2 = new Number(ui->widget_2); number_2->resize(175,32); number_2->move(0,0); number_2->set_Number(temp); number_2->show(); number_3 = new Number(ui->widget_3); number_3->resize(175,32); number_3->move(0,0); number_3->set_Number(temp); number_3->show(); number_4 = new Number(ui->widget_4); number_4->resize(175,32); number_4->move(0,0); number_4->set_Number(temp); number_4->show(); number_5 = new Number(ui->widget_5); number_5->resize(175,32); number_5->move(0,0); number_5->set_Number(temp); number_5->show(); number_6 = new Number(ui->widget_6); number_6->resize(175,32); number_6->move(0,0); number_6->set_Number(temp); number_6->show();
新建6个界面实例
bool flag_pointer = true; void Widget::timerout_poinyer() { if(flag_pointer) { if(pointer_number<135) { ++pointer_number; if(pointer_number == 135) { flag_pointer = false; } } } else { if(pointer_number>-135) { --pointer_number; if(pointer_number == -135) { flag_pointer = true; } } } ++temp; if(temp>999999) { temp = 0; } number_1->set_Number(temp); number_2->set_Number(temp); number_3->set_Number(temp); number_4->set_Number(temp); number_5->set_Number(temp); number_6->set_Number(temp); this->update(); }
在这里来刷新指针和刷新数字界面的显示
大家可能看到图中有的界面是有那个没有系安全带的图标，有的有，这里是实现了一个1Hz的图标闪烁，其实原理很简单，就是QLabel的隐藏，显示，再隐藏，再显示。。。
实现代码：
void Widget::timeout_people() { if(ui->label_people->isHidden()) { ui->label_people->show(); } else { ui->label_people->hide(); } }
