controls.c

#include "controls.h"

/**
 * Copies the bytes from the password input into a useable (multibyte string) buffer.
 * @param  data
 * @return      Zero on success, non-zero otherwise (as descirbed in error.h).
 */
int getHandlerText(InstanceData* data) {
	// free the current pointers
	free(data->channel);
	free(data->password);

	// copy the input from the password handle into a useable buffer
	// GetWindowTextW will truncate and append the the wide null terminator
	// if the input byte count is > FORM_CTRL_BUF_SIZE - 2
	wchar_t buf[FORM_CTRL_BUF_SIZE];
	int p = GetWindowTextW(
		data->handlers.ctrlPassword,
		buf,
		FORM_CTRL_BUF_SIZE
	);

	// GetWindowTextW returns the number of characters copied
	if (p == 0) {
		return ARE_USER_INPUT;
	}

	// convert the password to a multibyte string
	data->password = wstrToStr(buf);

	if (!data->password) {
		// out of memory
		return ARE_OUT_OF_MEM;
	}

	// find channel name in the channel list
	ChannelNode* node = data->chanList->head;
	int idx = (int) SendMessageW(data->handlers.ctrlChannel, CB_GETCURSEL, 0, 0);

	if (idx == CB_ERR) {
		// no item selected
		return ARE_USER_INPUT;
	}

	// advance to the selected channel
	for (int i = 0; i < idx; i++) {
		node = node->next;
	}

	// convert the selected channel's ID to a multibyte string
	data->channel = wstrToStr(node->chan->id);

	if (!data->channel) {
		// out of memory
		return ARE_OUT_OF_MEM;
	}

	return 0;
}

/**
 * Create the static and edit controls and bind them to the parent window.
 * @param  parent   Used as hWndParent argument to CreateWindow.
 * @param  handlers Members are set to their respective window handlers.
 * @return          True if all windows were created and false otherwise.
 */
bool createControls(HWND parent, struct formHandlers* handlers) {
	// info button
	handlers->btnInfo = CreateWindowW(
		L"Button",
		L"?",
		FORM_BTN_STYLE,
		WINDOW_W - MARGIN_X * 4,
		WINDOW_H - MARGIN_Y * 7,
		20,
		20,
		parent,
		(HMENU) BTN_INFO,
		NULL,
		NULL
	);

	// channel label
	handlers->lblChannel = CreateWindowW(
		L"Static",
		L"Channel",
		FORM_LBL_STYLE,
		MARGIN_X,
		MARGIN_Y,
		FORM_LBL_W,
		FORM_LBL_H,
		parent,
		NULL,
		NULL,
		NULL
	);

	// channel input
	handlers->ctrlChannel = CreateWindowW(
		L"ComboBox",
		NULL,
		CBS_DROPDOWNLIST | CBS_HASSTRINGS | FORM_CTRL_STYLE,
		MARGIN_X,
		MARGIN_Y + FORM_LBL_H + FORM_MARGIN_H,
		FORM_CTRL_W,
		FORM_CTRL_H,
		parent,
		NULL,
		NULL,
		NULL
	);

	// "refresh" button
	handlers->btnRefresh = CreateWindowW(
		L"Button",
		L"Refresh",
		FORM_BTN_STYLE,
		FORM_BTN_I_MARGIN_X,
		MARGIN_Y + FORM_LBL_H + FORM_MARGIN_H - 1,
		FORM_BTN_I_W,
		FORM_BTN_H,
		parent,
		(HMENU) BTN_REFRESH,
		NULL,
		NULL
	);

	// channel password label
	handlers->lblPassword = CreateWindowW(
		L"Static",
		L"Channel Password",
		FORM_LBL_STYLE,
		MARGIN_X,
		MARGIN_Y + FORM_GROUP_H,
		FORM_LBL_W,
		FORM_LBL_H,
		parent,
		NULL,
		NULL,
		NULL
	);

	// channel password input
	handlers->ctrlPassword = CreateWindowW(
		L"Edit",
		NULL,
		FORM_CTRL_STYLE | ES_PASSWORD,
		MARGIN_X,
		MARGIN_Y + FORM_GROUP_H + FORM_LBL_H + FORM_MARGIN_H,
		FORM_CTRL_W,
		FORM_CTRL_H,
		parent,
		NULL,
		NULL,
		NULL
	);

	// button
	handlers->btnToggle = CreateWindowW(
		L"Button",
		BTN_START,
		FORM_BTN_STYLE,
		MARGIN_X,
		MARGIN_Y + FORM_GROUP_H * 2,
		FORM_BTN_I_W,
		FORM_BTN_H,
		parent,
		(HMENU) BTN_TOGGLE,
		NULL,
		NULL
	);

	// return true if all of the windows were created successfully
	// and false otherwise
	return (
		handlers->lblChannel &&
		handlers->lblPassword &&
		handlers->ctrlChannel &&
		handlers->ctrlPassword &&
		handlers->btnToggle &&
		handlers->btnRefresh &&
		handlers->btnInfo
	);
}