[英]Replace sizer of a wxFrame in wxWidgets
I am writing a small Minesweeper game just to get familiar with wxWidgets (Windows, wxWidgets 3.1.4).我正在编写一个小型扫雷游戏,只是为了熟悉 wxWidgets(Windows,wxWidgets 3.1.4)。 The app can handle one game well, and now I would like to add the "new game" functionality.该应用程序可以很好地处理一个游戏,现在我想添加“新游戏”功能。 For the layout, I am using a wxGridSizer
.对于布局,我使用的是wxGridSizer
。
My first approach was to create a new wxGridSizer
with the new fields in it, and just replace the current sizer with the new one.我的第一种方法是创建一个包含新字段的新wxGridSizer
,然后将当前的 sizer 替换为新的。 Even though I figured out how to reuse the old sizer (and it is probably also a better solution in general), I am kind of curious how can I replace the sizer properly.即使我想出了如何重用旧的sizer(一般来说它可能也是一个更好的解决方案),我还是很好奇如何正确更换sizer。
I was able to simplify my problem to this:我能够将我的问题简化为:
#include <wx/wxprec.h>
#ifndef WX_PRECOMP
#include <wx/wx.h>
#endif
class MyApp : public wxApp {
public:
virtual bool OnInit();
};
class MyFrame : public wxFrame {
public:
MyFrame(const wxString &title, const wxPoint &pos, const wxSize &size);
private:
void OnExit(wxCommandEvent &event);
void OnRefill(wxCommandEvent &event);
wxDECLARE_EVENT_TABLE();
};
enum { ID_Refill = 1 };
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(ID_Refill, MyFrame::OnRefill)
EVT_MENU(wxID_EXIT, MyFrame::OnExit)
wxEND_EVENT_TABLE() wxIMPLEMENT_APP(MyApp);
bool MyApp::OnInit() {
MyFrame *frame = new MyFrame("Hello World", wxPoint(50, 50), wxSize(300, 200));
frame->Show(true);
return true;
}
MyFrame::MyFrame(const wxString &title, const wxPoint &pos, const wxSize &size)
: wxFrame(NULL, wxID_ANY, title, pos, size) {
wxMenu *menu = new wxMenu;
menu->Append(ID_Refill, "&Refill...\tCtrl-R", "Creates new layout");
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append(menu, "&Menu");
SetMenuBar(menuBar);
wxGridSizer *sizer = new wxGridSizer(2, 2, 1, 1);
SetSizer(sizer);
for (auto i = 0; i < 4; i++) {
wxButton *button = new wxButton(this, wxID_ANY, std::to_string(i), wxDefaultPosition, wxDefaultSize, 0);
sizer->Add(button, wxALL, 0);
}
}
void MyFrame::OnExit(wxCommandEvent &) {
Close(true);
}
void MyFrame::OnRefill(wxCommandEvent &) {
Freeze();
GetSizer()->Clear(true);
wxGridSizer *sizer = new wxGridSizer(3, 3, 1, 1);
SetSizer(sizer);
for (auto i = 0; i < 9; i++) {
wxButton *button = new wxButton(this, wxID_ANY, std::string("Refilled") + std::to_string(i), wxDefaultPosition,
wxDefaultSize, 0);
sizer->Add(button, wxALL, 0);
}
sizer->Layout();
Thaw();
Refresh();
}
The problem is after the OnRefill
function the app only shows the first button ( Refilled0
), but not the rest of the buttons.问题是在OnRefill
function 之后,应用程序只显示第一个按钮( Refilled0
),而不是按钮的 rest 。
Before OnRefill
:在OnRefill
之前:
After OnRefill
: OnRefill
之后:
My question is how can I replace the sizer of MyFrame
properly?我的问题是如何正确更换MyFrame
的 sizer? Based on what I understood from the examples and the documentation, this should work, but I guess I am missing something.根据我从示例和文档中了解到的内容,这应该可行,但我想我遗漏了一些东西。
To replace the sizer, you just need to make one small change to the MyFrame::OnRefill
method.要替换 sizer,您只需对MyFrame::OnRefill
方法进行一点更改。
Instead of calling sizer->Layout();
而不是调用sizer->Layout();
simply call Layout();
只需调用Layout();
. . I'm not entirely sure why calling Layout for the sizer doesn't work.我不完全确定为什么为 sizer 调用 Layout 不起作用。
The full method looks like this:完整的方法如下所示:
void MyFrame::OnRefill(wxCommandEvent &) {
Freeze();
GetSizer()->Clear(true);
wxGridSizer *sizer = new wxGridSizer(3, 3, 1, 1);
SetSizer(sizer);
for (auto i = 0; i < 9; i++) {
wxButton *button = new wxButton(this, wxID_ANY, std::string("Refilled") + std::to_string(i), wxDefaultPosition,
wxDefaultSize, 0);
sizer->Add(button, wxALL, 0);
}
Layout();
Thaw();
Refresh();
}
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