qt

问题 I want to customize the text Selection in QTextEdit, I want two things: Remove white spaces/lines when selecting. Be able to choose the width of the selection, either the widget width or the text width. White Spaces/Lines : Typically, what I would like is that : (from Bear app) : Bear Text Selection While using QTextEdit widget, I've noticed that when I select the text, there are white lines between selected lines : White Lines Issue To fix this, I tried some things: I have set some colors to

问题 I want to plot a series of points (distance r, angle a, strength s) in a QPolarChart QPolarChart *chart = new QPolarChart(); ScatterSeries *series1 = new QScatterSeries(); series1->setMarkerSize(s); for(int i = 0; i < count; i++) { series1->setMarkerSize(s); // -> of course changes the marker size for the complete series series1->append(r, a); } chart->addSeries(series1); Now I want to make the marker size individual for each point, basically the size should represent the "strength" of each

问题 I do not even know how to ask this question. I have the following table: You can see how the QTableWidget is selected, but the actual table is smaller. How can I make the table to be the same size of the QTableWidget container? I am using QT-Designer. Thanks! 回答1: from Qt Designer there are horizontalHeaderStretchLastSection and verticalHeaderStretchLastSection properties on QTableWidget. 来源： https://stackoverflow.com/questions/13689184/how-to-make-the-actual-table-adjust-its-size-to-the

问题 I created an application using Qt 5 (compiled with Visual Studio '12). It works on my machine. However, it doesn't work when I attempt to run it on another machine. The output I collected through cmd yielded an empty file. The directory structure is as follows: myapp.exe icudt52.dll icuin52.dll icuuc52.dll libEGL.dll libGLESv2.dll msvcp120.dll msvcr120.dll Qt5Core.dll Qt5Gui.dll platforms/qminimal.dll platforms/qwindows.dll The most relevant post I found was Application deployed with QT5

问题 I have some difficulties with QT, which I need for school for some GUI applications. I have recently done these steps: 1) mingw-get-inst-20120426.exe from SourceForge installed to C:\MinGW\ with default settings. 2) Qt libraries 4.8.4 for Windows (minGW 4.4, 317 MB) from QT Project installed to C:\Qt\ with default settings. Here an error occurs: !!!There is a problem with your MinQW instalation !!!g++ not found in c:\MinGW\bin\ !!!Do you still want to continue? Yes I checked c:\MinGW\bin\

问题 I'm still having a great deal of difficulty understanding QAbstractItemModel's representation of items. There are two methods that return QModelIndex items that just aren't making any sense to me. QModelIndex QAbstractItemModel::index(int row, int column, const QModelIndex& index) is the first. What is the view passing to this function? I index the specific tree item to have an index created for? If so, what's the point of the function? Why not just return index? What do row and column

问题 I have some difficulties with QT, which I need for school for some GUI applications. I have recently done these steps: 1) mingw-get-inst-20120426.exe from SourceForge installed to C:\MinGW\ with default settings. 2) Qt libraries 4.8.4 for Windows (minGW 4.4, 317 MB) from QT Project installed to C:\Qt\ with default settings. Here an error occurs: !!!There is a problem with your MinQW instalation !!!g++ not found in c:\MinGW\bin\ !!!Do you still want to continue? Yes I checked c:\MinGW\bin\

问题 I'm still having a great deal of difficulty understanding QAbstractItemModel's representation of items. There are two methods that return QModelIndex items that just aren't making any sense to me. QModelIndex QAbstractItemModel::index(int row, int column, const QModelIndex& index) is the first. What is the view passing to this function? I index the specific tree item to have an index created for? If so, what's the point of the function? Why not just return index? What do row and column

问题 I want to cross compile qt5 on RPi2 according to this RaspberryPi2EGLFS when I want to configure in step7 I see this error and I don't have any idea how to solve it. . . collect2: error: ld returned 1 exit status Makefile:91: recipe for target 'c++11' failed make: *** [c++11] Error 1 C++11 disabled. ERROR: Qt requires a C++11 compiler and yours does not seem to be that. Please upgrade. I use antergos x64. 来源： https://stackoverflow.com/questions/38232461/cannot-cross-compile-qt-5-7-for

问题 I can't get it why the ff code returns 12.62 instead of 12.63 QDebug << QString::number(12.625, 'f', 2); and also what will be the solution for this? Currently my solution is this QDebug << QString::number(12.625 + 0.0001, 'f', 2); and it will return 12.63 . btw my OS is ubuntu 11.04 回答1: GCC uses "Round to Even" or "Banker's Rounding" as it's default mode while Visual Studio uses "Round away from Zero" From the GCC docs: Rounding This is the default mode. It should be used unless there is a