qwt

I get an error undefined reference to `QwtPlot::QwtPlot(QWidget*)' when I try to build my project even though everything seems fine in the setup. In my CmakeLists.txt I have include_directories( [...] ${QWT_INCLUDE_DIR}) which points to where I have my Qwt headers and find_package(Qwt REQUIRED) works because QWT_FOUND is set to True Here's my FindQwt.cmake: #MESSAGE("Searching for QWT") FIND_PATH(QWT_INCLUDE_DIR NAMES qwt.h PATHS /usr/include /usr/local/include "$ENV{LIB_DIR}/include" "$ENV{INCLUDE}" PATH_SUFFIXES qwt-qt4 qwt ) FIND_LIBRARY(QWT_LIBRARY NAMES qwt qwt5 qwt-qt4 qwt5-qt4 PATHS

I searched around the web but didn't find a solution for my proper problem. Problem: Qwt-installation failes at the nmake -step What I did: -) installed Qt 5.1 ( Qt 5.1.1 for Windows 64-bit (VS 2012, 525 MB) ) (Info)from qt-website -) Downloaded Qwt 6.1.0 files from here -) extracted Files to C:/Qt/Qwt-6.1.0 -) set correct path in qwtconfig.pri -) started MSVC 2012 console (coming with Qt) and run qmake qwt.pro -) tried nmake in same consol (but nmake.exe was not found) --> installed Microsoft Visual 2010 Express from here (automatically installed to 'Program Files (x86)') -) tried again in

I have 3 objects(inherited from QObject ) that each contain a separate std::list . Each object gets created in the main gui thread (with no parent) and then is pushed to it's own thread (using Qt's QObject::moveToThread() ). Each thread is hooked up to a gui and messages are sent between the different threads with data. Each thread is to essentially handle it's own list. For example: Obj 1 : Consumer of data. It pop's the front off of its list(if data is present) to use. It also has a SLOT available so that other threads can push data to it. No other object can access this list directly only

I'm trying to generate a pdf using Qt5 under Windows. My document contains texts, images and charts. As I'm familiar with Qt and Qwt, I believed the best strategy was to create a QWidget with my document layout and simply print it. But I face problems and could not end up with an acceptable result. Here is my MCVE, a simple page document with: A header with title and image A piece of text A simple chart Based on Qt document and How can I print a QWidget in Qt? , I ended up with this code: main.cpp: #include <QApplication> #include <QIcon> #include <QDesktopServices> #include <QWidget> #include

win上傻瓜化安装Qt开发环境 古老的 MSYS 搭建的开发环境不仅存在一些兼容性问题，而且还很繁琐，幸好 mingw-build 项目的开发者又做了更进一步的改进，他们开发了 MSYS2 项目。这个项目不仅兼容性更好，而且引入了包管理机制，可以直接从网上下载相关的软件，并解决相关的依赖性问题。 这个项目的主页在 http://sourceforge.net/projects/msys2/ 进入项目主页后，根据你的系统选择 32 位或者 64 位，现在大家使用的系统应该都是 64 位的了。下载好 base 包，然后解压缩到什么地方，一般我都是解压缩到 D 盘的根目录下，然后把 bin 目录加入系统 PATH 。在 MSYS2 根目录下有 3 个 bat 文件，它们是启动 MSYS2 的命令，根据需要启动，如果你不做开发，那么只需要启动 msys2_shell.bat 就足够了；如果你需要软件开发，那么就启动 mingw64_shell.bat ，它会在 MSYS 目录下新建一个 mingw64 的目录，里面存放着 mingw 编译器及其类库。首次运行时会进行一些系统设定，等到命令提示符出现就完成了，此时需要退出 MSYS2 ，然后重新进入。 在 MSYS 窗口左上角点击那个图标，弹出的菜单中有 option ，可以设置 MSYS2 的一些参数

I am using qt and qwt. I want to plot a graph but I am completely new to it. Can some one please give me a link which explains basic graph plotting using qwt? thanks There is a good start point here also reading this tutorial helped me a lot. maybe you should take a look at documentation too. 来源： https://stackoverflow.com/questions/5393279/tutorial-on-graphs-plotting-qwt

I have a qwt plot in my application. I want to show a small tool tip to show the value of the point at which mouse is pointed on the curve. I found that I have to use QwtPlotPicker for this, but couldn't find any proper example to implement this in my code. I am new to Qwt so it would be great if anyone could help me solve this problem. Thanks, Rakesh. c_k The author himself says here : A QwtPlotPicker gives you the current position of the mouse ( in screen and plot coordinates ). Then you need to find the closest points of your curves. You can use QwtPlotCurve::closestPoint(), but in most

一、首先要定义和实例化一个QwtPlot，然后是一根曲线QwtPlotCurve，还有就是数据，由于QwtPlot是从设计器拉到界面，IDE做了这个工作就暂时不管了，如果没有IDE可以用代码写的： //曲线 QwtPlotCurve * curve; //X轴 double time[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; //Y轴 double val[10] = {3, 5, 8, 7, 2, 0, 7, 9, 1}; //实例化 curve = new QwtPlotCurve("Acc_X"); //加载数据 curve->setSamples(time, val, 10); //加到plot，plot由IDE创建 curve->attach(ui->qwtPlot); 图表显示出来，现在的问题是这是一个静态图标，如何动态显示实时数据呢，我们用定时器模拟产生随机数进行动态数据的展示，如下： //启动定时器，1秒响应，用于模拟产生实时数据 this->startTimer(1000); //定时器事件 void MainWindow::timerEvent( QTimerEvent * ) { //所有数据前移移位，首位被覆盖 for (int i = 0; i < 9; i++) { val[i] = val[i+1]; } /

环境：Qt4.8.3 、 Qwt6.1.2 、64位linux; #make 步骤二.进行环境配置 1.vi /etc/profile 2.添加环境变量 export C_INCLUDE_PATH=/usr/local/qwt-6.1.2/include:$C_INCLUDE_PATH 步骤三.如果完成上述两部之后，打开qtcreator的qtdesiger设计界面找不到qwt的绘图控件，则将解压出的 /qwt-6.1.2/designer/plugins/designer/libqwt_designer_plugin.so 复制到Qt的安装目录下： /usr/lib/qt4/plugins/designer下即可。 此种方式不需要再Qt的.pro文件中添加路径； 如果不行，重启Qt更新环境配置即可。 文章来源: linux下qwt6.1.2的安装