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archived-hidapi/testgui/test.cpp
Alan Ott b20777fc0c testgui: more robust handling of report length fields 
Improve logic of report length field handling for empty fields.
Add column headers for data and length fields.
Add documentation statement about length fields.
Increase window size.
Add message boxes when invalid values are entered.
memset() buffers to zero.
2012-11-26 22:27:24 -05:00

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/*******************************************************
Demo Program for HIDAPI
Alan Ott
Signal 11 Software
2010-07-20
Copyright 2010, All Rights Reserved
This contents of this file may be used by anyone
for any reason without any conditions and may be
used as a starting point for your own applications
which use HIDAPI.
********************************************************/
#include <fx.h>
#include "hidapi.h"
#include "mac_support.h"
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#ifdef _WIN32
// Thanks Microsoft, but I know how to use strncpy().
#pragma warning(disable:4996)
#endif
class MainWindow : public FXMainWindow {
FXDECLARE(MainWindow)
public:
enum {
ID_FIRST = FXMainWindow::ID_LAST,
ID_CONNECT,
ID_DISCONNECT,
ID_RESCAN,
ID_SEND_OUTPUT_REPORT,
ID_SEND_FEATURE_REPORT,
ID_GET_FEATURE_REPORT,
ID_CLEAR,
ID_TIMER,
ID_MAC_TIMER,
ID_LAST,
};
private:
FXList *device_list;
FXButton *connect_button;
FXButton *disconnect_button;
FXButton *rescan_button;
FXButton *output_button;
FXLabel *connected_label;
FXTextField *output_text;
FXTextField *output_len;
FXButton *feature_button;
FXButton *get_feature_button;
FXTextField *feature_text;
FXTextField *feature_len;
FXTextField *get_feature_text;
FXText *input_text;
FXFont *title_font;
struct hid_device_info *devices;
hid_device *connected_device;
size_t getDataFromTextField(FXTextField *tf, char *buf, size_t len);
int getLengthFromTextField(FXTextField *tf);
protected:
MainWindow() {};
public:
MainWindow(FXApp *a);
~MainWindow();
virtual void create();
long onConnect(FXObject *sender, FXSelector sel, void *ptr);
long onDisconnect(FXObject *sender, FXSelector sel, void *ptr);
long onRescan(FXObject *sender, FXSelector sel, void *ptr);
long onSendOutputReport(FXObject *sender, FXSelector sel, void *ptr);
long onSendFeatureReport(FXObject *sender, FXSelector sel, void *ptr);
long onGetFeatureReport(FXObject *sender, FXSelector sel, void *ptr);
long onClear(FXObject *sender, FXSelector sel, void *ptr);
long onTimeout(FXObject *sender, FXSelector sel, void *ptr);
long onMacTimeout(FXObject *sender, FXSelector sel, void *ptr);
};
// FOX 1.7 changes the timeouts to all be nanoseconds.
// Fox 1.6 had all timeouts as milliseconds.
#if (FOX_MINOR >= 7)
const int timeout_scalar = 1000*1000;
#else
const int timeout_scalar = 1;
#endif
FXMainWindow *g_main_window;
FXDEFMAP(MainWindow) MainWindowMap [] = {
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_CONNECT, MainWindow::onConnect ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_DISCONNECT, MainWindow::onDisconnect ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_RESCAN, MainWindow::onRescan ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_SEND_OUTPUT_REPORT, MainWindow::onSendOutputReport ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_SEND_FEATURE_REPORT, MainWindow::onSendFeatureReport ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_GET_FEATURE_REPORT, MainWindow::onGetFeatureReport ),
FXMAPFUNC(SEL_COMMAND, MainWindow::ID_CLEAR, MainWindow::onClear ),
FXMAPFUNC(SEL_TIMEOUT, MainWindow::ID_TIMER, MainWindow::onTimeout ),
FXMAPFUNC(SEL_TIMEOUT, MainWindow::ID_MAC_TIMER, MainWindow::onMacTimeout ),
};
FXIMPLEMENT(MainWindow, FXMainWindow, MainWindowMap, ARRAYNUMBER(MainWindowMap));
MainWindow::MainWindow(FXApp *app)
: FXMainWindow(app, "HIDAPI Test Application", NULL, NULL, DECOR_ALL, 200,100, 425,700)
{
devices = NULL;
connected_device = NULL;
FXVerticalFrame *vf = new FXVerticalFrame(this, LAYOUT_FILL_Y|LAYOUT_FILL_X);
FXLabel *label = new FXLabel(vf, "HIDAPI Test Tool");
title_font = new FXFont(getApp(), "Arial", 14, FXFont::Bold);
label->setFont(title_font);
new FXLabel(vf,
"Select a device and press Connect.", NULL, JUSTIFY_LEFT);
new FXLabel(vf,
"Output data bytes can be entered in the Output section, \n"
"separated by space, comma or brackets. Data starting with 0x\n"
"is treated as hex. Data beginning with a 0 is treated as \n"
"octal. All other data is treated as decimal.", NULL, JUSTIFY_LEFT);
new FXLabel(vf,
"Data received from the device appears in the Input section.",
NULL, JUSTIFY_LEFT);
new FXLabel(vf,
"Optionally, a report length may be specified. Extra bytes are\n"
"padded with zeros. If no length is specified, the length is \n"
"inferred from the data.",
NULL, JUSTIFY_LEFT);
new FXLabel(vf, "");
// Device List and Connect/Disconnect buttons
FXHorizontalFrame *hf = new FXHorizontalFrame(vf, LAYOUT_FILL_X);
//device_list = new FXList(new FXHorizontalFrame(hf,FRAME_SUNKEN|FRAME_THICK, 0,0,0,0, 0,0,0,0), NULL, 0, LISTBOX_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_Y|LAYOUT_FIX_WIDTH|LAYOUT_FIX_HEIGHT, 0,0,300,200);
device_list = new FXList(new FXHorizontalFrame(hf,FRAME_SUNKEN|FRAME_THICK|LAYOUT_FILL_X|LAYOUT_FILL_Y, 0,0,0,0, 0,0,0,0), NULL, 0, LISTBOX_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_Y, 0,0,300,200);
FXVerticalFrame *buttonVF = new FXVerticalFrame(hf);
connect_button = new FXButton(buttonVF, "Connect", NULL, this, ID_CONNECT, BUTTON_NORMAL|LAYOUT_FILL_X);
disconnect_button = new FXButton(buttonVF, "Disconnect", NULL, this, ID_DISCONNECT, BUTTON_NORMAL|LAYOUT_FILL_X);
disconnect_button->disable();
rescan_button = new FXButton(buttonVF, "Re-Scan devices", NULL, this, ID_RESCAN, BUTTON_NORMAL|LAYOUT_FILL_X);
new FXHorizontalFrame(buttonVF, 0, 0,0,0,0, 0,0,50,0);
connected_label = new FXLabel(vf, "Disconnected");
new FXHorizontalFrame(vf);
// Output Group Box
FXGroupBox *gb = new FXGroupBox(vf, "Output", FRAME_GROOVE|LAYOUT_FILL_X);
FXMatrix *matrix = new FXMatrix(gb, 3, MATRIX_BY_COLUMNS|LAYOUT_FILL_X);
new FXLabel(matrix, "Data");
new FXLabel(matrix, "Length");
new FXLabel(matrix, "");
//hf = new FXHorizontalFrame(gb, LAYOUT_FILL_X);
output_text = new FXTextField(matrix, 30, NULL, 0, TEXTFIELD_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_COLUMN);
output_text->setText("1 0x81 0");
output_len = new FXTextField(matrix, 5, NULL, 0, TEXTFIELD_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_COLUMN);
output_button = new FXButton(matrix, "Send Output Report", NULL, this, ID_SEND_OUTPUT_REPORT, BUTTON_NORMAL|LAYOUT_FILL_X);
output_button->disable();
//new FXHorizontalFrame(matrix, LAYOUT_FILL_X);
//hf = new FXHorizontalFrame(gb, LAYOUT_FILL_X);
feature_text = new FXTextField(matrix, 30, NULL, 0, TEXTFIELD_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_COLUMN);
feature_len = new FXTextField(matrix, 5, NULL, 0, TEXTFIELD_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_COLUMN);
feature_button = new FXButton(matrix, "Send Feature Report", NULL, this, ID_SEND_FEATURE_REPORT, BUTTON_NORMAL|LAYOUT_FILL_X);
feature_button->disable();
get_feature_text = new FXTextField(matrix, 30, NULL, 0, TEXTFIELD_NORMAL|LAYOUT_FILL_X|LAYOUT_FILL_COLUMN);
new FXWindow(matrix);
get_feature_button = new FXButton(matrix, "Get Feature Report", NULL, this, ID_GET_FEATURE_REPORT, BUTTON_NORMAL|LAYOUT_FILL_X);
get_feature_button->disable();
// Input Group Box
gb = new FXGroupBox(vf, "Input", FRAME_GROOVE|LAYOUT_FILL_X|LAYOUT_FILL_Y);
FXVerticalFrame *innerVF = new FXVerticalFrame(gb, LAYOUT_FILL_X|LAYOUT_FILL_Y);
input_text = new FXText(new FXHorizontalFrame(innerVF,LAYOUT_FILL_X|LAYOUT_FILL_Y|FRAME_SUNKEN|FRAME_THICK, 0,0,0,0, 0,0,0,0), NULL, 0, LAYOUT_FILL_X|LAYOUT_FILL_Y);
input_text->setEditable(false);
new FXButton(innerVF, "Clear", NULL, this, ID_CLEAR, BUTTON_NORMAL|LAYOUT_RIGHT);
}
MainWindow::~MainWindow()
{
if (connected_device)
hid_close(connected_device);
hid_exit();
delete title_font;
}
void
MainWindow::create()
{
FXMainWindow::create();
show();
onRescan(NULL, 0, NULL);
#ifdef __APPLE__
init_apple_message_system();
#endif
getApp()->addTimeout(this, ID_MAC_TIMER,
50 * timeout_scalar /*50ms*/);
}
long
MainWindow::onConnect(FXObject *sender, FXSelector sel, void *ptr)
{
if (connected_device != NULL)
return 1;
FXint cur_item = device_list->getCurrentItem();
if (cur_item < 0)
return -1;
FXListItem *item = device_list->getItem(cur_item);
if (!item)
return -1;
struct hid_device_info *device_info = (struct hid_device_info*) item->getData();
if (!device_info)
return -1;
connected_device = hid_open_path(device_info->path);
if (!connected_device) {
FXMessageBox::error(this, MBOX_OK, "Device Error", "Unable To Connect to Device");
return -1;
}
hid_set_nonblocking(connected_device, 1);
getApp()->addTimeout(this, ID_TIMER,
5 * timeout_scalar /*5ms*/);
FXString s;
s.format("Connected to: %04hx:%04hx -", device_info->vendor_id, device_info->product_id);
s += FXString(" ") + device_info->manufacturer_string;
s += FXString(" ") + device_info->product_string;
connected_label->setText(s);
output_button->enable();
feature_button->enable();
get_feature_button->enable();
connect_button->disable();
disconnect_button->enable();
input_text->setText("");
return 1;
}
long
MainWindow::onDisconnect(FXObject *sender, FXSelector sel, void *ptr)
{
hid_close(connected_device);
connected_device = NULL;
connected_label->setText("Disconnected");
output_button->disable();
feature_button->disable();
get_feature_button->disable();
connect_button->enable();
disconnect_button->disable();
getApp()->removeTimeout(this, ID_TIMER);
return 1;
}
long
MainWindow::onRescan(FXObject *sender, FXSelector sel, void *ptr)
{
struct hid_device_info *cur_dev;
device_list->clearItems();
// List the Devices
hid_free_enumeration(devices);
devices = hid_enumerate(0x0, 0x0);
cur_dev = devices;
while (cur_dev) {
// Add it to the List Box.
FXString s;
FXString usage_str;
s.format("%04hx:%04hx -", cur_dev->vendor_id, cur_dev->product_id);
s += FXString(" ") + cur_dev->manufacturer_string;
s += FXString(" ") + cur_dev->product_string;
usage_str.format(" (usage: %04hx:%04hx) ", cur_dev->usage_page, cur_dev->usage);
s += usage_str;
FXListItem *li = new FXListItem(s, NULL, cur_dev);
device_list->appendItem(li);
cur_dev = cur_dev->next;
}
if (device_list->getNumItems() == 0)
device_list->appendItem("*** No Devices Connected ***");
else {
device_list->selectItem(0);
}
return 1;
}
size_t
MainWindow::getDataFromTextField(FXTextField *tf, char *buf, size_t len)
{
const char *delim = " ,{}\t\r\n";
FXString data = tf->getText();
const FXchar *d = data.text();
size_t i = 0;
// Copy the string from the GUI.
size_t sz = strlen(d);
char *str = (char*) malloc(sz+1);
strcpy(str, d);
// For each token in the string, parse and store in buf[].
char *token = strtok(str, delim);
while (token) {
char *endptr;
long int val = strtol(token, &endptr, 0);
buf[i++] = val;
token = strtok(NULL, delim);
}
free(str);
return i;
}
/* getLengthFromTextField()
Returns length:
0: empty text field
>0: valid length
-1: invalid length */
int
MainWindow::getLengthFromTextField(FXTextField *tf)
{
long int len;
FXString str = tf->getText();
size_t sz = str.length();
if (sz > 0) {
char *endptr;
len = strtol(str.text(), &endptr, 0);
if (endptr != str.text() && *endptr == '\0') {
if (len <= 0) {
FXMessageBox::error(this, MBOX_OK, "Invalid length", "Enter a length greater than zero.");
return -1;
}
return len;
}
else
return -1;
}
return 0;
}
long
MainWindow::onSendOutputReport(FXObject *sender, FXSelector sel, void *ptr)
{
char buf[256];
size_t data_len, len;
int textfield_len;
memset(buf, 0x0, sizeof(buf));
textfield_len = getLengthFromTextField(output_len);
data_len = getDataFromTextField(output_text, buf, sizeof(buf));
if (textfield_len < 0) {
FXMessageBox::error(this, MBOX_OK, "Invalid length", "Length field is invalid. Please enter a number in hex, octal, or decimal.");
return 1;
}
if (textfield_len > sizeof(buf)) {
FXMessageBox::error(this, MBOX_OK, "Invalid length", "Length field is too long.");
return 1;
}
len = (textfield_len)? textfield_len: data_len;
int res = hid_write(connected_device, (const unsigned char*)buf, len);
if (res < 0) {
FXMessageBox::error(this, MBOX_OK, "Error Writing", "Could not write to device. Error reported was: %ls", hid_error(connected_device));
}
return 1;
}
long
MainWindow::onSendFeatureReport(FXObject *sender, FXSelector sel, void *ptr)
{
char buf[256];
size_t data_len, len;
int textfield_len;
memset(buf, 0x0, sizeof(buf));
textfield_len = getLengthFromTextField(feature_len);
data_len = getDataFromTextField(feature_text, buf, sizeof(buf));
if (textfield_len < 0) {
FXMessageBox::error(this, MBOX_OK, "Invalid length", "Length field is invalid. Please enter a number in hex, octal, or decimal.");
return 1;
}
if (textfield_len > sizeof(buf)) {
FXMessageBox::error(this, MBOX_OK, "Invalid length", "Length field is too long.");
return 1;
}
len = (textfield_len)? textfield_len: data_len;
int res = hid_send_feature_report(connected_device, (const unsigned char*)buf, len);
if (res < 0) {
FXMessageBox::error(this, MBOX_OK, "Error Writing", "Could not send feature report to device. Error reported was: %ls", hid_error(connected_device));
}
return 1;
}
long
MainWindow::onGetFeatureReport(FXObject *sender, FXSelector sel, void *ptr)
{
char buf[256];
size_t len;
memset(buf, 0x0, sizeof(buf));
len = getDataFromTextField(get_feature_text, buf, sizeof(buf));
if (len != 1) {
FXMessageBox::error(this, MBOX_OK, "Too many numbers", "Enter only a single report number in the text field");
}
int res = hid_get_feature_report(connected_device, (unsigned char*)buf, sizeof(buf));
if (res < 0) {
FXMessageBox::error(this, MBOX_OK, "Error Getting Report", "Could not get feature report from device. Error reported was: %ls", hid_error(connected_device));
}
if (res > 0) {
FXString s;
s.format("Returned Feature Report. %d bytes:\n", res);
for (int i = 0; i < res; i++) {
FXString t;
t.format("%02hhx ", buf[i]);
s += t;
if ((i+1) % 4 == 0)
s += " ";
if ((i+1) % 16 == 0)
s += "\n";
}
s += "\n";
input_text->appendText(s);
input_text->setBottomLine(INT_MAX);
}
return 1;
}
long
MainWindow::onClear(FXObject *sender, FXSelector sel, void *ptr)
{
input_text->setText("");
return 1;
}
long
MainWindow::onTimeout(FXObject *sender, FXSelector sel, void *ptr)
{
unsigned char buf[256];
int res = hid_read(connected_device, buf, sizeof(buf));
if (res > 0) {
FXString s;
s.format("Received %d bytes:\n", res);
for (int i = 0; i < res; i++) {
FXString t;
t.format("%02hhx ", buf[i]);
s += t;
if ((i+1) % 4 == 0)
s += " ";
if ((i+1) % 16 == 0)
s += "\n";
}
s += "\n";
input_text->appendText(s);
input_text->setBottomLine(INT_MAX);
}
if (res < 0) {
input_text->appendText("hid_read() returned error\n");
input_text->setBottomLine(INT_MAX);
}
getApp()->addTimeout(this, ID_TIMER,
5 * timeout_scalar /*5ms*/);
return 1;
}
long
MainWindow::onMacTimeout(FXObject *sender, FXSelector sel, void *ptr)
{
#ifdef __APPLE__
check_apple_events();
getApp()->addTimeout(this, ID_MAC_TIMER,
50 * timeout_scalar /*50ms*/);
#endif
return 1;
}
int main(int argc, char **argv)
{
FXApp app("HIDAPI Test Application", "Signal 11 Software");
app.init(argc, argv);
g_main_window = new MainWindow(&app);
app.create();
app.run();
return 0;
}
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