cheng/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add Cancel button to webrequest sample

Browse Source
This commit is contained in:
Tobias Taschner 2018-10-31 22:49:34 +01:00
parent d32e27191d
commit 6bafed4ceb
No known key found for this signature in database
GPG Key ID: AE6ECD71294F87FD
1 changed files with 101 additions and 81 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

182
samples/webrequest/webrequest.cpp
View File

@ -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);
@ -178,38 +187,37 @@ public:
// Prepare request based on selected action
switch (m_notebook->GetSelection())
{
case Page_Image:
// Reset static bitmap image
m_imageStaticBitmap->SetBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE));
break;
case Page_Text:
// Reset response text control
m_textResponseTextCtrl->Clear();
case Page_Image:
// Reset static bitmap image
m_imageStaticBitmap->SetBitmap(wxArtProvider::GetBitmap(wxART_MISSING_IMAGE));
break;
case Page_Text:
// Reset response text control
m_textResponseTextCtrl->Clear();
// Set postdata if checked
if (m_postCheckBox->IsChecked())
{
request->SetData(m_postRequestTextCtrl->GetValue(),
m_postContentTypeTextCtrl->GetValue());
}
break;
case Page_Download:
m_downloadRequest = request.get();
request->SetStorage(wxWebRequest::Storage_File);
m_downloadGauge->SetValue(0);
m_downloadGauge->Pulse();
m_downloadStaticText->SetLabel("");
m_downloadProgressTimer.Start(500);
GetStatusBar()->SetStatusText("");
break;
case Page_Advanced:
request->SetStorage(wxWebRequest::Storage_None);
request->Bind(wxEVT_WEBREQUEST_DATA, &WebRequestFrame::OnRequestData, this);
// Set postdata if checked
if ( m_postCheckBox->IsChecked() )
{
request->SetData(m_postRequestTextCtrl->GetValue(),
m_postContentTypeTextCtrl->GetValue());
}
break;
case Page_Download:
request->SetStorage(wxWebRequest::Storage_File);
m_downloadGauge->SetValue(0);
m_downloadGauge->Pulse();
m_downloadStaticText->SetLabel("");
m_downloadProgressTimer.Start(500);
GetStatusBar()->SetStatusText("");
break;
case Page_Advanced:
request->SetStorage(wxWebRequest::Storage_None);
request->Bind(wxEVT_WEBREQUEST_DATA, &WebRequestFrame::OnRequestData, this);
GetStatusBar()->SetStatusText("Counting...");
m_advCount = 0;
m_advCountStaticText->SetLabel("0");
break;
GetStatusBar()->SetStatusText("Counting...");
m_advCount = 0;
m_advCountStaticText->SetLabel("0");
break;
}
m_startButton->Disable();
@ -218,68 +226,79 @@ 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())
{
case wxWebRequest::State_Completed:
switch (m_notebook->GetSelection())
{
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 )
case Page_Image:
{
if (!wxRenameFile(evt.GetResponseFileName(), fileDlg.GetPath()))
wxLogError("Could not move file");
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:
{
m_downloadGauge->SetValue(100);
m_downloadStaticText->SetLabel("");
break;
}
case Page_Advanced:
UpdateAdvCount();
GetStatusBar()->SetStatusText("");
break;
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()) )
wxLogError("Could not move file");
}
break;
}
case Page_Advanced:
UpdateAdvCount();
GetStatusBar()->SetStatusText("");
break;
}
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;