c++ - How to make a wxFrame behave like a modal wxDialog object

Question

Is is possible to make a wxFrame object behave like a modal dialog box in that the window creating the wxFrame object stops execution until the wxFrame object exits?

I'm working on a small game and have run into the following problem. I have a main program window that hosts the main application (strategic portion). Occasionally, I need to transfer control to a second window for resolution of part of the game (tactical portion). While in the second window, I want the processing in the first window to stop and wait for completion of the work being done in the second window.

Normally a modal dialog would do the trick but I want the new window to have some functionality that I can't seem to get with a wxDialog, namely a status bar at the bottom and the ability to resize/maximize/minimize the window (this should be possible but doesn't work, see this question How to get the minimize and maximize buttons to appear on a wxDialog object).

As an addition note, I want the second window's functionality needs to stay completely decoupled from the primary window as it will be spun off into a separate program eventually.

Has anyone done this or have any suggestions?

score 4 · Accepted Answer

我也在寻找类似的解决方案，并提出了这个解决方案，创建一个框架，通过执行 frame.MakeModal() 禁用其他窗口，并在显示框架后停止执行启动和事件循环，当框架关闭时退出事件循环，例如我这里是使用 wxpython 的示例，但它在 wxwidgets 中应该是相似的。

import wx

class ModalFrame(wx.Frame):
    def __init__(self, parent, title):
        wx.Frame.__init__(self, parent, title=title, style=wx.DEFAULT_FRAME_STYLE|wx.STAY_ON_TOP)

        btn = wx.Button(self, label="Close me")
        btn.Bind(wx.EVT_BUTTON, self.onClose)
        self.Bind(wx.EVT_CLOSE, self.onClose) # (Allows main window close to work)

    def onClose(self, event):
        self.MakeModal(False) # (Re-enables parent window)
        self.eventLoop.Exit()
        self.Destroy() # (Closes window without recursion errors)

    def ShowModal(self):
        self.MakeModal(True) # (Explicit call to MakeModal)
        self.Show()

        # now to stop execution start a event loop 
        self.eventLoop = wx.EventLoop()
        self.eventLoop.Run()


app = wx.PySimpleApp()
frame = wx.Frame(None, title="Test Modal Frame")
btn = wx.Button(frame, label="Open modal frame")

def onclick(event):
    modalFrame = ModalFrame(frame, "Modal Frame")
    modalFrame.ShowModal()
    print "i will get printed after modal close"

btn.Bind(wx.EVT_BUTTON, onclick)

frame.Show()
app.SetTopWindow(frame)
app.MainLoop()

score 3 · Accepted Answer

“停止执行”窗口实际上没有任何意义，因为窗口只处理发送给它的事件，例如鼠标、键盘或绘图事件，而忽略它们会使程序看起来挂起。您应该做的是禁用框架中的所有控件，这将使它们变灰并使用户意识到此时无法与之交互的事实。

您还可以完全禁用父框架，而不是禁用其上的所有控件。查看wxWindowDisabler类，构造函数有一个参数指示可以与之交互的窗口，应用程序的所有其他窗口都将被禁用。

如果您稍后想要执行辅助程序，那么您可以使用wxExecute()函数来执行它。

score 3 · Accepted Answer

这让我花了很长时间才弄清楚，但这是一个从 Anurag 的例子中衍生出来的工作示例：

import wx

class ChildFrame(wx.Frame):
    ''' ChildFrame launched from MainFrame '''
    def __init__(self, parent, id):
        wx.Frame.__init__(self, parent, -1,
                          title=self.__class__.__name__,
                          size=(300,150))

        panel = wx.Panel(self, -1)
        closeButton = wx.Button(panel, label="Close Me")

        self.Bind(wx.EVT_BUTTON, self.__onClose, id=closeButton.GetId())
        self.Bind(wx.EVT_CLOSE, self.__onClose) # (Allows frame's title-bar close to work)

        self.CenterOnParent()
        self.GetParent().Enable(False)
        self.Show(True)

        self.__eventLoop = wx.EventLoop()
        self.__eventLoop.Run()

    def __onClose(self, event):
        self.GetParent().Enable(True)
        self.__eventLoop.Exit()
        self.Destroy()

class MainFrame(wx.Frame):
    ''' Launches ChildFrame when button is clicked. '''
    def __init__(self, parent, id):
        wx.Frame.__init__(self, parent, id,
                          title=self.__class__.__name__,
                          size=(400, 300))

        panel = wx.Panel(self, -1)
        launchButton = wx.Button(panel, label="launch modal window")

        self.Bind(wx.EVT_BUTTON, self.__onClick, id=launchButton.GetId())

        self.Centre()
        self.Show(True)

    def __onClick(self, event):
        dialog = ChildFrame(self, -1)
        print "I am printed by MainFrame and get printed after ChildFrame is closed"

if __name__ == '__main__':
    app = wx.App()    
    frame = MainFrame(None, -1)
    frame.Show()
    app.MainLoop()

score 0 · Accepted Answer

不确定这是一个很好的答案，但它确实有效。

bool WinApp1::OnInit()
{
  if (!wxApp::OnInit())
    return false;

  SettingsDialog dialog(m_settingsData);
  dialog.ShowModal();

  return false;
}

SettingsDialog::SettingsDialog(SettingsData& settingsData)
  : m_settingsData(settingsData)
{
  SetExtraStyle(wxDIALOG_EX_CONTEXTHELP);

  wxWindow* parent = nullptr;
  Create(parent, wxID_ANY, "Preferences", wxDefaultPosition, wxDefaultSize,
    wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER);

WinApp1 窗口永远不会被赋予 wxFrame 并且永远不会绘制。

c++ - How to make a wxFrame behave like a modal wxDialog object

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