mirror of
https://github.com/jkriege2/JKQtPlotter.git
synced 2024-11-16 02:25:50 +08:00
145 lines
5.2 KiB
Markdown
145 lines
5.2 KiB
Markdown
# Tutorial (JKQTPlotter): Using a JKQTPlotter inside a Qt User Interface Designer (UI) File {#JKQTPlotterQtCreator}
|
|
This project (see `./examples/simpletest_ui/`) demonstrates how to create add a `JKQTPlotter` inside the Qt Form Editor (e.g. called from of Qt Creator) into a widget.
|
|
|
|
# Instructions on how to use JKQTPlotter in the Qt Form Designer
|
|
|
|
For this to work you have to follow the steps shown below:
|
|
|
|
1. add a new UI-file to your project and open it in the Form Editor. Then right-click the form and select `Promote Widgets ...`:<br>
|
|
|
|
|
|
2. In the dialog that opens, you have to define `JKQTPlotter` as a promotion to `QWidget` as shown below. Finally store the settings by clicking `Add` and closing the dialog with `Close`.<br>
|
|
|
|
|
|
3. Now you can add a `QWidget`from the side-bar to the form and then promote it to `JKQTPlotter`, by selecting and right-clicking the `QWidget` and then selecting `Promote To | JKQTPlotter`:<br>
|
|
|
|
|
|
|
|
|
|
# QMake-Project of this example
|
|
|
|
The QMake project for such a project looks like this (see [`jkqtplotter_simpletest_ui.pro`](https://github.com/jkriege2/JKQtPlotter/tree/master/examples/simpletest_ui/jkqtplotter_simpletest_ui.pro):
|
|
```.qmake
|
|
# source code for this simple demo
|
|
SOURCES = jkqtplotter_simpletest_ui.cpp \
|
|
formwithjkqtplotter.cpp
|
|
|
|
FORMS += formwithjkqtplotter.ui
|
|
|
|
HEADERS += formwithjkqtplotter.h
|
|
|
|
# configure Qt
|
|
CONFIG += qt
|
|
QT += core gui xml svg
|
|
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets printsupport
|
|
|
|
# output executable name
|
|
TARGET = jkqtplotter_simpletest_ui
|
|
|
|
# include JKQTPlotter source headers and link against library
|
|
DEPENDPATH += ../../lib ../../staticlib/jkqtplotterlib
|
|
INCLUDEPATH += ../../lib
|
|
CONFIG (debug, debug|release) {
|
|
LIBS += -L../../staticlib/jkqtplotterlib/debug -ljkqtplotterlib_debug
|
|
} else {
|
|
LIBS += -L../../staticlib/jkqtplotterlib/release -ljkqtplotterlib
|
|
}
|
|
message("LIBS = $$LIBS")
|
|
|
|
win32-msvc*: DEFINES += _USE_MATH_DEFINES
|
|
win32-msvc*: DEFINES += NOMINMAX
|
|
|
|
|
|
|
|
|
|
```
|
|
|
|
As you can see there is a main CPP-file (shown below) and a `formwithjkqtplotter.ui`-file with the `formwithjkqtplotter.cpp/.h`-files that are used to implement the functionality behind the form (see next chapter).
|
|
|
|
The source code of the main application is simply instanciating the Form class `FormWithJKQTPlotter` from `formwithjkqtplotter.ui/.h/.cpp`:
|
|
```.cpp
|
|
#include <QApplication>
|
|
#include "formwithjkqtplotter.h"
|
|
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
QApplication app(argc, argv);
|
|
|
|
FormWithJKQTPlotter plot;
|
|
plot.show();
|
|
plot.resize(600,400);
|
|
|
|
return app.exec();
|
|
}
|
|
```
|
|
|
|
# Form Class `FormWithJKQTPlotter`
|
|
|
|
The Form was designed in the Qt Form Designer within Qt Creator, using the method described above (see `formwithjkqtplotter.ui`):
|
|
|
|
|
|
|
|
In addition the example implements some simple functionality in the `formwithjkqtplotter.cpp/.h`-files. A single graph, which parses and plots a function (from a `QLineEdit`) is added to the plot in the constructor:
|
|
```.cpp
|
|
#include "formwithjkqtplotter.h"
|
|
#include "ui_formwithjkqtplotter.h"
|
|
|
|
FormWithJKQTPlotter::FormWithJKQTPlotter(QWidget *parent) :
|
|
QWidget(parent),
|
|
ui(new Ui::FormWithJKQTPlotter)
|
|
{
|
|
ui->setupUi(this);
|
|
graph=new JKQTPXParsedFunctionLineGraph(ui->plot);
|
|
graph->setFunction(ui->edtEquation->text());
|
|
graph->setTitle(ui->edtEquation->text());
|
|
ui->plot->addGraph(graph);
|
|
ui->plot->setXY(-10,10,-10,10);
|
|
}
|
|
```
|
|
|
|
Then three slots react to user interactions. First two interactions set the x- or y-axis to linear or logarithmic, depending on the state of the two check-boxes. It also sets the scaling of the axes to meaningful default values:
|
|
```.cpp
|
|
void FormWithJKQTPlotter::on_chkLogX_toggled(bool checked)
|
|
{
|
|
ui->plot->getXAxis()->setLogAxis(checked);
|
|
if (checked) {
|
|
ui->plot->setX(1e-3,10);
|
|
} else {
|
|
ui->plot->setX(-10,10);
|
|
}
|
|
}
|
|
|
|
void FormWithJKQTPlotter::on_chkLogY_toggled(bool checked)
|
|
{
|
|
ui->plot->getYAxis()->setLogAxis(checked);
|
|
if (checked) {
|
|
ui->plot->setY(1e-3,10);
|
|
} else {
|
|
ui->plot->setY(-10,10);
|
|
}
|
|
}
|
|
```
|
|
|
|
A third slot is connected to the `clicked()`-event of the `QPushButton` labeled "REPLOT!". This slot reads the function from the `QLineEdit` and updates the plot with it:
|
|
```.cpp
|
|
void FormWithJKQTPlotter::on_btnReplot_clicked()
|
|
{
|
|
graph->setFunction(ui->edtEquation->text());
|
|
graph->setTitle(ui->edtEquation->text());
|
|
ui->plot->redrawPlot();
|
|
}
|
|
```
|
|
|
|
|
|
The result looks like this:
|
|
|
|
|
|
|
|
If you set both axes to logarithmic and modify the plotted function a bit, you get:
|
|
|
|
|
|
|
|
|
|
|