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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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182
samples/webrequest/webrequest.cpp
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@@ -144,9 +144,17 @@ public:
mainSizer->Add(m_notebook, wxSizerFlags(1).Expand().Border()); 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); 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; wxCommandEvent evt;
OnPostCheckBox(evt); OnPostCheckBox(evt);
@@ -161,7 +169,7 @@ public:
m_downloadProgressTimer.Bind(wxEVT_TIMER, m_downloadProgressTimer.Bind(wxEVT_TIMER,
&WebRequestFrame::OnProgressTimer, this); &WebRequestFrame::OnProgressTimer, this);
m_downloadRequest = NULL; m_currentRequest = NULL;
} }
void OnStartButton(wxCommandEvent& WXUNUSED(evt)) void OnStartButton(wxCommandEvent& WXUNUSED(evt))
@@ -171,6 +179,7 @@ public:
// Create request for the specified URL from the default session // Create request for the specified URL from the default session
wxObjectDataPtr<wxWebRequest> request(wxWebSession::GetDefault().CreateRequest( wxObjectDataPtr<wxWebRequest> request(wxWebSession::GetDefault().CreateRequest(
m_urlTextCtrl->GetValue())); m_urlTextCtrl->GetValue()));
m_currentRequest = request.get();
// Bind event for state change // Bind event for state change
request->Bind(wxEVT_WEBREQUEST_STATE, &WebRequestFrame::OnWebRequestState, this); request->Bind(wxEVT_WEBREQUEST_STATE, &WebRequestFrame::OnWebRequestState, this);
@@ -178,38 +187,37 @@ public:
// Prepare request based on selected action // Prepare request based on selected action
switch (m_notebook->GetSelection()) switch (m_notebook->GetSelection())
{ {
case Page_Image: case Page_Image:
// Reset static bitmap image // Reset static bitmap image
m_imageStaticBitmap->SetBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE)); m_imageStaticBitmap->SetBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE));
break; break;
case Page_Text: case Page_Text:
// Reset response text control // Reset response text control
m_textResponseTextCtrl->Clear(); m_textResponseTextCtrl->Clear();
// Set postdata if checked // Set postdata if checked
if (m_postCheckBox->IsChecked()) if ( m_postCheckBox->IsChecked() )
{ {
request->SetData(m_postRequestTextCtrl->GetValue(), request->SetData(m_postRequestTextCtrl->GetValue(),
m_postContentTypeTextCtrl->GetValue()); m_postContentTypeTextCtrl->GetValue());
} }
break; break;
case Page_Download: case Page_Download:
m_downloadRequest = request.get(); request->SetStorage(wxWebRequest::Storage_File);
request->SetStorage(wxWebRequest::Storage_File); m_downloadGauge->SetValue(0);
m_downloadGauge->SetValue(0); m_downloadGauge->Pulse();
m_downloadGauge->Pulse(); m_downloadStaticText->SetLabel("");
m_downloadStaticText->SetLabel(""); m_downloadProgressTimer.Start(500);
m_downloadProgressTimer.Start(500); GetStatusBar()->SetStatusText("");
GetStatusBar()->SetStatusText(""); break;
break; case Page_Advanced:
case Page_Advanced: request->SetStorage(wxWebRequest::Storage_None);
request->SetStorage(wxWebRequest::Storage_None); request->Bind(wxEVT_WEBREQUEST_DATA, &WebRequestFrame::OnRequestData, this);
request->Bind(wxEVT_WEBREQUEST_DATA, &WebRequestFrame::OnRequestData, this);
GetStatusBar()->SetStatusText("Counting..."); GetStatusBar()->SetStatusText("Counting...");
m_advCount = 0; m_advCount = 0;
m_advCountStaticText->SetLabel("0"); m_advCountStaticText->SetLabel("0");
break; break;
} }
m_startButton->Disable(); m_startButton->Disable();
@@ -218,68 +226,79 @@ public:
request->Start(); request->Start();
} }
void OnCancelButton(wxCommandEvent& WXUNUSED(evt))
{
if ( m_currentRequest )
m_currentRequest->Cancel();
}
void OnWebRequestState(wxWebRequestEvent& evt) void OnWebRequestState(wxWebRequestEvent& evt)
{ {
m_startButton->Enable(evt.GetState() != wxWebRequest::State_Active); 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()) switch (evt.GetState())
{ {
case wxWebRequest::State_Completed: case wxWebRequest::State_Completed:
switch (m_notebook->GetSelection()) switch (m_notebook->GetSelection())
{ {
case Page_Image: case Page_Image:
{
wxImage img(*evt.GetResponse()->GetStream());
m_imageStaticBitmap->SetBitmap(img);
m_notebook->GetPage(Page_Image)->Layout();
GetStatusBar()->SetStatusText(wxString::Format("Loaded %lld bytes image data", evt.GetResponse()->GetContentLength()));
break;
}
case Page_Text:
m_textResponseTextCtrl->SetValue(evt.GetResponse()->AsString());
GetStatusBar()->SetStatusText(wxString::Format("Loaded %lld bytes text data (Status: %d %s)",
evt.GetResponse()->GetContentLength(),
evt.GetResponse()->GetStatus(),
evt.GetResponse()->GetStatusText()));
break;
case Page_Download:
{
// Force last progress update
wxTimerEvent timerEvt;
OnProgressTimer(timerEvt);
// Stop updating download progress
m_downloadRequest = NULL;
m_downloadProgressTimer.Stop();
GetStatusBar()->SetStatusText("Download completed");
// Ask the user where to save the file
wxFileDialog fileDlg(this, "Save download", "",
evt.GetResponse()->GetSuggestedFileName(), "*.*",
wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
if ( fileDlg.ShowModal() == wxID_OK )
{ {
if (!wxRenameFile(evt.GetResponseFileName(), fileDlg.GetPath())) wxImage img(*evt.GetResponse()->GetStream());
wxLogError("Could not move file"); m_imageStaticBitmap->SetBitmap(img);
m_notebook->GetPage(Page_Image)->Layout();
GetStatusBar()->SetStatusText(wxString::Format("Loaded %lld bytes image data", evt.GetResponse()->GetContentLength()));
break;
} }
case Page_Text:
m_textResponseTextCtrl->SetValue(evt.GetResponse()->AsString());
GetStatusBar()->SetStatusText(wxString::Format("Loaded %lld bytes text data (Status: %d %s)",
evt.GetResponse()->GetContentLength(),
evt.GetResponse()->GetStatus(),
evt.GetResponse()->GetStatusText()));
break;
case Page_Download:
{
m_downloadGauge->SetValue(100);
m_downloadStaticText->SetLabel("");
break; GetStatusBar()->SetStatusText("Download completed");
}
case Page_Advanced: // Ask the user where to save the file
UpdateAdvCount(); wxFileDialog fileDlg(this, "Save download", "",
GetStatusBar()->SetStatusText(""); evt.GetResponse()->GetSuggestedFileName(), "*.*",
break; wxFD_SAVE | wxFD_OVERWRITE_PROMPT);
if ( fileDlg.ShowModal() == wxID_OK )
{
if ( !wxRenameFile(evt.GetResponseFileName(), fileDlg.GetPath()) )
wxLogError("Could not move file");
}
break;
}
case Page_Advanced:
UpdateAdvCount();
GetStatusBar()->SetStatusText("");
break;
} }
break; break;
case wxWebRequest::State_Failed: case wxWebRequest::State_Failed:
// Stop updating download progress
m_downloadRequest = NULL;
m_downloadProgressTimer.Stop();
wxLogError("Web Request failed: %s", evt.GetErrorDescription()); wxLogError("Web Request failed: %s", evt.GetErrorDescription());
GetStatusBar()->SetStatusText(""); GetStatusBar()->SetStatusText("");
break; 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)) void OnProgressTimer(wxTimerEvent& WXUNUSED(evt))
{ {
if (!m_downloadRequest || m_downloadRequest->GetBytesExpectedToReceive() <= 0) if ( !m_currentRequest || m_currentRequest->GetBytesExpectedToReceive() <= 0 )
return; return;
m_downloadGauge->SetValue((m_downloadRequest->GetBytesReceived() * 100) / m_downloadGauge->SetValue((m_currentRequest->GetBytesReceived() * 100) /
m_downloadRequest->GetBytesExpectedToReceive()); m_currentRequest->GetBytesExpectedToReceive());
m_downloadStaticText->SetLabelText(wxString::Format("%lld/%lld", m_downloadStaticText->SetLabelText(wxString::Format("%lld/%lld",
m_downloadRequest->GetBytesReceived(), m_downloadRequest->GetBytesExpectedToReceive())); m_currentRequest->GetBytesReceived(), m_currentRequest->GetBytesExpectedToReceive()));
} }
void OnPostCheckBox(wxCommandEvent& WXUNUSED(evt)) void OnPostCheckBox(wxCommandEvent& WXUNUSED(evt))
@@ -358,7 +377,9 @@ private:
wxNotebook* m_notebook; wxNotebook* m_notebook;
wxTextCtrl* m_urlTextCtrl; wxTextCtrl* m_urlTextCtrl;
wxButton* m_startButton; wxButton* m_startButton;
wxButton* m_cancelButton;
wxStaticBitmap* m_imageStaticBitmap; wxStaticBitmap* m_imageStaticBitmap;
wxWebRequest* m_currentRequest;
wxCheckBox* m_postCheckBox; wxCheckBox* m_postCheckBox;
wxTextCtrl* m_postContentTypeTextCtrl; wxTextCtrl* m_postContentTypeTextCtrl;
@@ -368,7 +389,6 @@ private:
wxGauge* m_downloadGauge; wxGauge* m_downloadGauge;
wxStaticText* m_downloadStaticText; wxStaticText* m_downloadStaticText;
wxTimer m_downloadProgressTimer; wxTimer m_downloadProgressTimer;
wxWebRequest* m_downloadRequest;
wxStaticText* m_advCountStaticText; wxStaticText* m_advCountStaticText;
long long m_advCount; long long m_advCount;