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Add Cancel button to webrequest sample

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This commit is contained in:
Tobias Taschner
2018-10-31 22:49:34 +01:00
parent d32e27191d
commit 6bafed4ceb
1 changed files with 101 additions and 81 deletions
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58
samples/webrequest/webrequest.cpp
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@@ -144,9 +144,17 @@ public:
mainSizer->Add(m_notebook, wxSizerFlags(1).Expand().Border());
m_startButton = new wxButton(this, wxID_ANY, "&Start Request");
wxStdDialogButtonSizer* btnSizer = new wxStdDialogButtonSizer();
m_cancelButton = new wxButton(this, wxID_CANCEL, "Cancel");
m_cancelButton->Bind(wxEVT_BUTTON, &WebRequestFrame::OnCancelButton, this);
m_cancelButton->Disable();
btnSizer->AddButton(m_cancelButton);
m_startButton = new wxButton(this, wxID_OK, "&Start Request");
m_startButton->Bind(wxEVT_BUTTON, &WebRequestFrame::OnStartButton, this);
mainSizer->Add(m_startButton, wxSizerFlags().Border());
btnSizer->AddButton(m_startButton);
btnSizer->Realize();
mainSizer->Add(btnSizer, wxSizerFlags().Border());
wxCommandEvent evt;
OnPostCheckBox(evt);
@@ -161,7 +169,7 @@ public:
m_downloadProgressTimer.Bind(wxEVT_TIMER,
&WebRequestFrame::OnProgressTimer, this);
m_downloadRequest = NULL;
m_currentRequest = NULL;
}
void OnStartButton(wxCommandEvent& WXUNUSED(evt))
@@ -171,6 +179,7 @@ public:
// Create request for the specified URL from the default session
wxObjectDataPtr<wxWebRequest> request(wxWebSession::GetDefault().CreateRequest(
m_urlTextCtrl->GetValue()));
m_currentRequest = request.get();
// Bind event for state change
request->Bind(wxEVT_WEBREQUEST_STATE, &WebRequestFrame::OnWebRequestState, this);
@@ -194,7 +203,6 @@ public:
}
break;
case Page_Download:
m_downloadRequest = request.get();
request->SetStorage(wxWebRequest::Storage_File);
m_downloadGauge->SetValue(0);
m_downloadGauge->Pulse();
@@ -218,9 +226,22 @@ public:
request->Start();
}
void OnCancelButton(wxCommandEvent& WXUNUSED(evt))
{
if ( m_currentRequest )
m_currentRequest->Cancel();
}
void OnWebRequestState(wxWebRequestEvent& evt)
{
m_startButton->Enable(evt.GetState() != wxWebRequest::State_Active);
m_cancelButton->Enable(evt.GetState() == wxWebRequest::State_Active);
if ( evt.GetState() != wxWebRequest::State_Active )
{
m_currentRequest = NULL;
m_downloadProgressTimer.Stop();
}
switch (evt.GetState())
{
@@ -244,13 +265,8 @@ public:
break;
case Page_Download:
{
// Force last progress update
wxTimerEvent timerEvt;
OnProgressTimer(timerEvt);
// Stop updating download progress
m_downloadRequest = NULL;
m_downloadProgressTimer.Stop();
m_downloadGauge->SetValue(100);
m_downloadStaticText->SetLabel("");
GetStatusBar()->SetStatusText("Download completed");
@@ -274,12 +290,15 @@ public:
break;
case wxWebRequest::State_Failed:
// Stop updating download progress
m_downloadRequest = NULL;
m_downloadProgressTimer.Stop();
wxLogError("Web Request failed: %s", evt.GetErrorDescription());
GetStatusBar()->SetStatusText("");
break;
case wxWebRequest::State_Cancelled:
m_downloadGauge->SetValue(0);
m_downloadStaticText->SetLabel("");
GetStatusBar()->SetStatusText("Cancelled");
break;
}
}
@@ -311,15 +330,15 @@ public:
void OnProgressTimer(wxTimerEvent& WXUNUSED(evt))
{
if (!m_downloadRequest || m_downloadRequest->GetBytesExpectedToReceive() <= 0)
if ( !m_currentRequest || m_currentRequest->GetBytesExpectedToReceive() <= 0 )
return;
m_downloadGauge->SetValue((m_downloadRequest->GetBytesReceived() * 100) /
m_downloadRequest->GetBytesExpectedToReceive());
m_downloadGauge->SetValue((m_currentRequest->GetBytesReceived() * 100) /
m_currentRequest->GetBytesExpectedToReceive());
m_downloadStaticText->SetLabelText(wxString::Format("%lld/%lld",
m_downloadRequest->GetBytesReceived(), m_downloadRequest->GetBytesExpectedToReceive()));
m_currentRequest->GetBytesReceived(), m_currentRequest->GetBytesExpectedToReceive()));
}
void OnPostCheckBox(wxCommandEvent& WXUNUSED(evt))
@@ -358,7 +377,9 @@ private:
wxNotebook* m_notebook;
wxTextCtrl* m_urlTextCtrl;
wxButton* m_startButton;
wxButton* m_cancelButton;
wxStaticBitmap* m_imageStaticBitmap;
wxWebRequest* m_currentRequest;
wxCheckBox* m_postCheckBox;
wxTextCtrl* m_postContentTypeTextCtrl;
@@ -368,7 +389,6 @@ private:
wxGauge* m_downloadGauge;
wxStaticText* m_downloadStaticText;
wxTimer m_downloadProgressTimer;
wxWebRequest* m_downloadRequest;
wxStaticText* m_advCountStaticText;
long long m_advCount;