不能使用go to dialog editor

qtdesigner sqlite qt

Rapid Dialog Design Qt is designed to be pleasant and intuitive to hand-code, and it is perfectly possible to develop Qt applications purely by writing C++ source code. Qt Designer expands the options available to programmers, allowing them to combine visually designed forms with their source code. In this section, we will use Qt Designer to create the Go-to-Cell dialog shown in Figure 2.4. Whether we do it in code or in Qt Designer, creating a dialog always involves the same fundamental steps: Create and initialize the child widgets. Put the child widgets in layouts. Set the tab order. Establish signal–slot connections. Implement the dialog's custom slots. Figure 2.4. Go-to-Cell dialog To launch Qt Designer, click Qt 3.2.x|Qt Designer in the Start menu on Windows, type designer on the command line on Unix, or double-click designer in the Mac OS X Finder. When Qt Designer starts, it will pop up a list of templates. Click the "Dialog" template, then click OK. You should now have a window called "Form1". Figure 2.5. Qt Designer with an empty form The first step is to create the child widgets and place them on the form. Create one text label, one line editor, one (horizontal) spacer, and two push buttons. For each item, click its name or icon in the "toolbox" at the left of Qt Designer's main window and then click the form roughly where the item should go. Now drag the bottom of the form up to make it shorter. This should produce a form that is similar to Figure 2.6. Don't spend too much time positioning the items on the form; Qt's layout managers will lay them out precisely later on.

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