I have an application I'm writing using the MFC Feature pack. It uses Document/View. Since these classes are derived from "normal" MFC classes, these questions may not be Feature Pack specific.
When a change is made, I add an asterisk * to the name on the tab, and the word (modified) to the main window title using the following code:
tabval = "Report_" + pDoc->rptData.reportId.Strip();
winval = tabval;
if (changed) {
tabval += " *";
winval += " (modified)";
}
frame->SetTitle(tabval);
frame->SetWindowText(tabval);
name = mainFrame->GetTitle();
mainFrame->SetWindowText(name + " - " + winval);
But when changing between tabs, the original text comes back. First question: how do I make the change sticky?
Second question: there's a tree view on the left and a properties window on the right. Switching between them (un)highlights the title bars to show which one is active. The user can also activate and interact with the document window, but there doesn't seem to be any way to give visual feedback that the document window is, in fact, active. How can I do that?
It's not clear what types your variables are, but as you have pDoc and frame, I'm assuming that the former is your CDocument derived class and the latter is possibly a CFrameWnd or CMDIFrameWnd derived class.
If I'm not far wrong, then the reason why the tab titles aren't sticking is that you should be calling SetTitle on the CDocument that's behind each tabbed view, so something like
tabval = "Report_" + pDoc->rptData.reportId.Strip();
winval = tabval;
if (changed) {
tabval += " *";
winval += " (modified)";
}
pDoc->SetTitle(tabval); // set tab title on CDocument
I had a similar problem in the past. The cause of main window's title text changing back is the function CFrameWndEx::OnUpdateFrameTitle. As it is virtual, you can override it on your own derived class to have the behaviour you want. It is a solution that worked for me.
Related
I used a QFileDialog to open a browser.
Here is my code:
QString filePath = QFileDialog::getSaveFileName(this,
"Export Xml", "PluginPythonQt",
"Xml files (*.xml)");
When excute it will show a dialog like this:
I want to disable the "File name:" box in the picture or prevent user to enter a new name. How can i do that ? Thanks.
I believe you can't achieve this — save dialog is about choosing name besides the choosing where to save it. Of course, you might just ignore what user typed and force your name when he hits OK but it will just make the user angry.
Better way, in my opinion, is to use QFileDialog::getExistingDirectory which will allow the user to choose where to save the file but won't allow him to choose the file name. It will be fair, at least.
Similar question was answered in https://forum.qt.io/topic/73973/qfiledialog-with-no-edit-box.
In general, you can hide any element in any widget if you dig a bit into widget's source code to find element's name, when you have a name, you can find the corresponding element via findChild<QWidget *>(elementName).
Usually if you check QSomeWidget.h (Qt is open source!) you can find element names very easily as they are typically listed as the widgets members.
To hide both labels, fileEdit, ComboBox and even buttons, you can use this code:
QFileDialog fileDialog = new QFileDialog;
QWidget * fileNameEdit = fileDialog->findChild<QWidget *>("fileNameEdit");
Q_ASSERT(fileNameEdit);
fileNameEdit->setVisible(false);
QWidget * fileNameLabel = fileDialog->findChild<QWidget *>("fileNameLabel");
fileNameLabel->setVisible(false);
QWidget * fileTypeCombo = fileDialog->findChild<QWidget *>("fileTypeCombo");
Q_ASSERT(fileTypeCombo);
fileTypeCombo->setVisible(false);
QWidget * fileTypeLabel = fileDialog->findChild<QWidget *>("fileTypeLabel");
fileTypeLabel->setVisible(false);
QWidget * fileButtonBox = fileDialog->findChild<QWidget *>("buttonBox");
fileButtonBox->setVisible(false);
Note that even though buttons are hidden, typing Enter on keyboard (or double clicking) would trigger Open button, and dialog might disappear if you haven't done anything in Accept method. So it would also be a good idea to handle state of that button as well if you really wish buttons to be hidden as well.
I'm making a program with Qt 4.8.5 on a Fedora system (unix). It's a QWizard structure with its QWizardPages.
I needed to change the default QWizard buttons (back, next, finish...) and customize it. I found I could do it putting the next lines on the constructor of my QWizard class called BaseWizard (class BaseWizard : public QWizard)
QList<QWizard::WizardButton> button_layout;
button_layout <<QWizard::Stretch << QWizard::CustomButton1 << QWizard::BackButton << QWizard::NextButton << QWizard::FinishButton;
this->setOptions(QWizard::NoDefaultButton);
With that what I have from left to right is one custom buttons, the back button, the next button and the finish button, and when I want I can show or hide the custom buttons with SetVisible() / SetDisabled() / setEnabled() functions.
That worked perfect for what I wanted until now... I have to make some changes to the program so I need to change those buttons depending on the page the user is. As I said before, I know I can change the visibility of CustomButton 1 for example BUT I can't do the same with back button so... my quesiton is: How can I decide which buttons I show in every QWizardPage (and their text) and which is the best way to do it?
I've tried creating a function on my BaseWizard
// Function to have only 2 custom buttons
void BaseWizard::ChangeButtons()
{
QList<QWizard::WizardButton> button_layout;
button_layout <<QWizard::Stretch << QWizard::CustomButton1 << QWizard::CustomButton2;
setButtonLayout(button_layout);
}
And then in the QWizardPage (lets call it WP) using it like:
BaseWizard *bz;
bz->ChangeButtons();
But when I do that nothing changes.I can still see the NextButon for example. I have tried also using first a button_layout.clear(); to see if clenaing it before adding the buttons works, but not.
I have also tried changing the text of CustomButton1. If I do it in the WP after calling ChangeButtons with
wizard()->button(QWizard::CustomButton1)->setText("TEXT CHANGED");
Then the text changes but if I put it in the ChangeButton() function with this->button(QWizard::CustomButton1)->setText("BBBBB"); it does nothing (But its entering into the funcion). Ofc if I try to change the text of CustomButton2 in WP nothing happens because I can't still see that button... so any idea of what I am doing wrong or how could I get what I try will be very apreciated,
Thank you so much.
Ok, I finally knew why was my program crashing... I put here the solution if anyone needs it in the future:
BaseWizard *bz; // <-- HERE is the problem
bz->ChangeButtons();
I was not initializing the pointer so it has to be changed to:
BaseWizard *bz = dynamic_cast<BaseWizard*>(wizard());
I'm a student and for my thesis I want to create a question-based game; I would like to use QT to elaborate the graphical interface, but I've never used it and I don't know how to create an application with multiple windows.
There is a base-class (abstract) called "Form" and three others classes that inherits from Form: MainMenuForm, LoginForm and GameForm.
In some of the examples I found, the layout of the window is setted in the constructor and in the main is called the method show(), but I would like to do something like this in the main:
// Creates a FormFactory object and ensures singleton instance
FormFactory * factory;
factory = factorySingleton.GetFactory();
//select a Form to display
int choice = 1;
Form * actualForm;
while (choice != 0)
{
factory->Init(choice);
actualForm = factory->ReturnActualForm();
choice = actualForm->Display();
}
The Display method, common to every derived-Form, must return an int that indicates which window display (for example, the Display method of MainMenuForm returns 2 if the user want to proceed to the Login window or 0 if the user want to close the application); obviously, the Display method must also show the form.
Finally, I noticed that in all examples they write
return app.exec();
in the end of the main.
For my project, where am I supposed to write app.exec()? Before, after or inside the while statement?
Your design is quite bad. The code you quoted should be in a separate class which is instantiated before calling app.exec(). The current solution only allows to select the form once, it will be displayed and when you close it, the program ends.
Read Qt docs about signals and slot, and how to write Qt GUI apps, you need a different approach.
So I'm making a text editor using Qt and right now I have a button that opens a dialog called "Format text". I want it to work kind of like the dialog in notepad called "font" where you select a few text attributes from some drop down lists and it shows you what your text will look like. Right now I have it working where you can select the font style, font color, and font size and hit preview and it shows you in a box in the dialog what your text will look like. However, I have a button called "okay" which is supposed to change the highlighted text or the text you are about to type, but I can't figure out how to display those changes on the main window. The .ui files are private and a lot of the already made functions and pointers are the same in every ui file so if I change the ui file to pubic I have to change a whole bunch of things. Can anyway give me a simple answer? I'm trying to do this with as little confusion as possible. More coding and less confusion is better than less coding and more confusion for someone of my skill level. Sorry that this is all one giant paragraph and that I didn't provide any code, but I didn't think the code was necessary, however if you do need some of the code i'd be happy to share it.
Thank you for your help and your time. I hope you all have a nice evening.
QDialog have a signal called finished(), you can connect this signal with your slot. To accomplish your work, pass a QSettings or for simplicity QStringList to dialog settings (responsible for changing font, color ...), the QStringList will save user defined settings, after closing the dialog, iterate through QStringList member to alert Main window.
A pseudo code will look like this
Class Editor:
Editor::Editor()
{
TextSettings textSettings;
textSettings.setSettings(settings); // settings is a member
connect(textSettings, &finished(int)), this, SLOT(alertEditor(int)))
}
Editor::alertEditor(int s)
{
if(s == 0)
{
for (int i = 0; i < settings.size(); ++i)
settings.at(i).toLocal8Bit().constData(); // extract various user settings
}
}
Class TextSettings:
TextSettings::TextSettings(QStringList settings)
{
settings << ui->combobox->currentItem(); // font name as example
}
In my application I have a number of panes from m_wndspliter classes. What I want to do is at run time show and hide one of these panes. Whilst with the following code I can show and hide the view associated with the pane, I can't temporarily remove the pane itself.
CWnd * pCurView = m_wndSplitter2.GetPane(2, 0);
if( !pCurView == NULL )
{
if( fShow )
{
pCurView->ShowWindow(SW_SHOW);
RecalcLayout();
}
else
{
pCurView->ShowWindow(SW_HIDE);
RecalcLayout();
}
}
Any examples / ideas ?
You need to call CSplitterWnd::DeleteView to do this, which basically means that you have to save your CView elsewhere if you intend to restore it. Usually this is not a problem as all data should be stored in the CDocument rather than CView, but in practice this may not be the case.
The way I have handled this in the past is to have a copy constructor for my CView classes so I could easily store them in temporary variables.
Does this help?
http://www.codeguru.com/cpp/w-d/splitter/article.php/c1543
I have used something very similar myself,
Only the CExtSplitter class from the CodeProject article https://www.codeproject.com/Articles/2707/A-Static-Splitter-with-the-Ability-to-Hide-Show-Mu worked for me.
This is still VC6 code but it worked with minor adaptions.