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reactos/rosapps/lib/dflat32/listbox.c
Steven Edwards 81345fd691 Still working on making dflat32 a dll. Alot of this will be cleaned up in the 
next few weeks. I'm going through the DFLAT api doc and fixing the export
names and then going to try to build a simple hello dflat application.

svn path=/trunk/; revision=2844
2002-04-14 10:15:06 +00:00

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/* ------------- listbox.c ------------ */
#include "dflat32/dflat.h"
#ifdef INCLUDE_EXTENDEDSELECTIONS
static int ExtendSelections(DFWINDOW, int, int);
static void TestExtended(DFWINDOW, PARAM);
static void ClearAllSelections(DFWINDOW);
static void SetSelection(DFWINDOW, int);
static void FlipSelection(DFWINDOW, int);
static void ClearSelection(DFWINDOW, int);
#else
#define TestExtended(w,p) /**/
#endif
static void ChangeSelection(DFWINDOW, int, int);
static void WriteSelection(DFWINDOW, int, int, DFRECT *);
static BOOL SelectionInWindow(DFWINDOW, int);
static int py = -1; /* the previous y mouse coordinate */
#ifdef INCLUDE_EXTENDEDSELECTIONS
/* --------- SHIFT_F8 Key ------------ */
static void AddModeKey(DFWINDOW wnd)
{
if (isMultiLine(wnd)) {
wnd->AddMode ^= TRUE;
DfSendMessage(GetParent(wnd), ADDSTATUS,
wnd->AddMode ? ((PARAM) "Add Mode") : 0, 0);
}
}
#endif
/* --------- UP (Up Arrow) Key ------------ */
static void UpKey(DFWINDOW wnd, PARAM p2)
{
if (wnd->selection > 0) {
if (wnd->selection == wnd->wtop) {
BaseWndProc(LISTBOX, wnd, KEYBOARD, UP, p2);
DfPostMessage(wnd, LB_SELECTION, wnd->selection-1,
isMultiLine(wnd) ? p2 : FALSE);
}
else {
int newsel = wnd->selection-1;
if (wnd->wlines == ClientHeight(wnd))
while (*TextLine(wnd, newsel) == LINE)
--newsel;
DfPostMessage(wnd, LB_SELECTION, newsel,
#ifdef INCLUDE_EXTENDEDSELECTIONS
isMultiLine(wnd) ? p2 :
#endif
FALSE);
}
}
}
/* --------- DN (Down Arrow) Key ------------ */
static void DnKey(DFWINDOW wnd, PARAM p2)
{
if (wnd->selection < wnd->wlines-1) {
if (wnd->selection == wnd->wtop+ClientHeight(wnd)-1) {
BaseWndProc(LISTBOX, wnd, KEYBOARD, DN, p2);
DfPostMessage(wnd, LB_SELECTION, wnd->selection+1,
isMultiLine(wnd) ? p2 : FALSE);
}
else {
int newsel = wnd->selection+1;
if (wnd->wlines == ClientHeight(wnd))
while (*TextLine(wnd, newsel) == LINE)
newsel++;
DfPostMessage(wnd, LB_SELECTION, newsel,
#ifdef INCLUDE_EXTENDEDSELECTIONS
isMultiLine(wnd) ? p2 :
#endif
FALSE);
}
}
}
/* --------- HOME and PGUP Keys ------------ */
static void HomePgUpKey(DFWINDOW wnd, PARAM p1, PARAM p2)
{
BaseWndProc(LISTBOX, wnd, KEYBOARD, p1, p2);
DfPostMessage(wnd, LB_SELECTION, wnd->wtop,
#ifdef INCLUDE_EXTENDEDSELECTIONS
isMultiLine(wnd) ? p2 :
#endif
FALSE);
}
/* --------- END and PGDN Keys ------------ */
static void EndPgDnKey(DFWINDOW wnd, PARAM p1, PARAM p2)
{
int bot;
BaseWndProc(LISTBOX, wnd, KEYBOARD, p1, p2);
bot = wnd->wtop+ClientHeight(wnd)-1;
if (bot > wnd->wlines-1)
bot = wnd->wlines-1;
DfPostMessage(wnd, LB_SELECTION, bot,
#ifdef INCLUDE_EXTENDEDSELECTIONS
isMultiLine(wnd) ? p2 :
#endif
FALSE);
}
#ifdef INCLUDE_EXTENDEDSELECTIONS
/* --------- Space Bar Key ------------ */
static void SpacebarKey(DFWINDOW wnd, PARAM p2)
{
if (isMultiLine(wnd)) {
int sel = DfSendMessage(wnd, LB_CURRENTSELECTION, 0, 0);
if (sel != -1) {
if (wnd->AddMode)
FlipSelection(wnd, sel);
if (ItemSelected(wnd, sel)) {
if (!((int) p2 & (LEFTSHIFT | RIGHTSHIFT)))
wnd->AnchorPoint = sel;
ExtendSelections(wnd, sel, (int) p2);
}
else
wnd->AnchorPoint = -1;
DfSendMessage(wnd, PAINT, 0, 0);
}
}
}
#endif
/* --------- Enter ('\r') Key ------------ */
static void EnterKey(DFWINDOW wnd)
{
if (wnd->selection != -1) {
DfSendMessage(wnd, LB_SELECTION, wnd->selection, TRUE);
DfSendMessage(wnd, LB_CHOOSE, wnd->selection, 0);
}
}
/* --------- All Other Key Presses ------------ */
static void KeyPress(DFWINDOW wnd, PARAM p1, PARAM p2)
{
int sel = wnd->selection+1;
while (sel < wnd->wlines) {
char *cp = TextLine(wnd, sel);
if (cp == NULL)
break;
#ifdef INCLUDE_EXTENDEDSELECTIONS
if (isMultiLine(wnd))
cp++;
#endif
/* --- special for directory list box --- */
if (*cp == '[')
cp++;
if (tolower(*cp) == (int)p1) {
DfSendMessage(wnd, LB_SELECTION, sel,
isMultiLine(wnd) ? p2 : FALSE);
if (!SelectionInWindow(wnd, sel)) {
wnd->wtop = sel-ClientHeight(wnd)+1;
DfSendMessage(wnd, PAINT, 0, 0);
}
break;
}
sel++;
}
}
/* --------- KEYBOARD Message ------------ */
static int KeyboardMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
{
switch ((int) p1) {
#ifdef INCLUDE_EXTENDEDSELECTIONS
case SHIFT_F8:
AddModeKey(wnd);
return TRUE;
#endif
case UP:
TestExtended(wnd, p2);
UpKey(wnd, p2);
return TRUE;
case DN:
TestExtended(wnd, p2);
DnKey(wnd, p2);
return TRUE;
case PGUP:
case HOME:
TestExtended(wnd, p2);
HomePgUpKey(wnd, p1, p2);
return TRUE;
case PGDN:
case END:
TestExtended(wnd, p2);
EndPgDnKey(wnd, p1, p2);
return TRUE;
#ifdef INCLUDE_EXTENDEDSELECTIONS
case ' ':
SpacebarKey(wnd, p2);
break;
#endif
case '\r':
EnterKey(wnd);
return TRUE;
default:
KeyPress(wnd, p1, p2);
break;
}
return FALSE;
}
/* ------- LEFT_BUTTON Message -------- */
static int LeftButtonMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
{
int my = (int) p2 - GetTop(wnd);
if (my >= wnd->wlines-wnd->wtop)
my = wnd->wlines - wnd->wtop;
if (!InsideRect(p1, p2, ClientRect(wnd)))
return FALSE;
if (wnd->wlines && my != py) {
int sel = wnd->wtop+my-1;
#ifdef INCLUDE_EXTENDEDSELECTIONS
int sh = getshift();
if (!(sh & (LEFTSHIFT | RIGHTSHIFT))) {
if (!(sh & CTRLKEY))
ClearAllSelections(wnd);
wnd->AnchorPoint = sel;
DfSendMessage(wnd, PAINT, 0, 0);
}
#endif
DfSendMessage(wnd, LB_SELECTION, sel, TRUE);
py = my;
}
return TRUE;
}
/* ------------- DOUBLE_CLICK Message ------------ */
static int DoubleClickMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
{
if (WindowMoving || WindowSizing)
return FALSE;
if (wnd->wlines) {
DFRECT rc = ClientRect(wnd);
BaseWndProc(LISTBOX, wnd, DOUBLE_CLICK, p1, p2);
if (InsideRect(p1, p2, rc))
DfSendMessage(wnd, LB_CHOOSE, wnd->selection, 0);
}
return TRUE;
}
/* ------------ ADDTEXT Message -------------- */
static int AddTextMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
{
int rtn = BaseWndProc(LISTBOX, wnd, ADDTEXT, p1, p2);
if (wnd->selection == -1)
DfSendMessage(wnd, LB_SETSELECTION, 0, 0);
#ifdef INCLUDE_EXTENDEDSELECTIONS
if (*(char *)p1 == LISTSELECTOR)
wnd->SelectCount++;
#endif
return rtn;
}
/* --------- GETTEXT Message ------------ */
static void GetTextMsg(DFWINDOW wnd, PARAM p1, PARAM p2)
{
if ((int)p2 != -1) {
char *cp1 = (char *)p1;
char *cp2 = TextLine(wnd, (int)p2);
while (cp2 && *cp2 && *cp2 != '\n')
*cp1++ = *cp2++;
*cp1 = '\0';
}
}
/* --------- LISTBOX Window Processing Module ------------ */
int ListBoxProc(DFWINDOW wnd, DFMESSAGE msg, PARAM p1, PARAM p2)
{
switch (msg) {
case CREATE_WINDOW:
BaseWndProc(LISTBOX, wnd, msg, p1, p2);
wnd->selection = -1;
#ifdef INCLUDE_EXTENDEDSELECTIONS
wnd->AnchorPoint = -1;
#endif
return TRUE;
case KEYBOARD:
if (WindowMoving || WindowSizing)
break;
if (KeyboardMsg(wnd, p1, p2))
return TRUE;
break;
case LEFT_BUTTON:
if (LeftButtonMsg(wnd, p1, p2) == TRUE)
return TRUE;
break;
case DOUBLE_CLICK:
if (DoubleClickMsg(wnd, p1, p2))
return TRUE;
break;
case DFM_BUTTON_RELEASED:
if (WindowMoving || WindowSizing || VSliding)
break;
py = -1;
return TRUE;
case ADDTEXT:
return AddTextMsg(wnd, p1, p2);
case DFM_LB_GETTEXT:
GetTextMsg(wnd, p1, p2);
return TRUE;
case CLEARTEXT:
wnd->selection = -1;
#ifdef INCLUDE_EXTENDEDSELECTIONS
wnd->AnchorPoint = -1;
#endif
wnd->SelectCount = 0;
break;
case PAINT:
BaseWndProc(LISTBOX, wnd, msg, p1, p2);
WriteSelection(wnd, wnd->selection, TRUE, (DFRECT *)p1);
return TRUE;
case SCROLL:
case HORIZSCROLL:
case SCROLLPAGE:
case HORIZPAGE:
case SCROLLDOC:
BaseWndProc(LISTBOX, wnd, msg, p1, p2);
WriteSelection(wnd,wnd->selection,TRUE,NULL);
return TRUE;
case LB_CHOOSE:
DfSendMessage(GetParent(wnd), LB_CHOOSE, p1, p2);
return TRUE;
case LB_SELECTION:
ChangeSelection(wnd, (int) p1, (int) p2);
DfSendMessage(GetParent(wnd), LB_SELECTION,
wnd->selection, 0);
return TRUE;
case LB_CURRENTSELECTION:
return wnd->selection;
case LB_SETSELECTION:
ChangeSelection(wnd, (int) p1, 0);
return TRUE;
#ifdef INCLUDE_EXTENDEDSELECTIONS
case CLOSE_WINDOW:
if (isMultiLine(wnd) && wnd->AddMode) {
wnd->AddMode = FALSE;
DfSendMessage(GetParent(wnd), ADDSTATUS, 0, 0);
}
break;
#endif
default:
break;
}
return BaseWndProc(LISTBOX, wnd, msg, p1, p2);
}
static BOOL SelectionInWindow(DFWINDOW wnd, int sel)
{
return (wnd->wlines && sel >= wnd->wtop &&
sel < wnd->wtop+ClientHeight(wnd));
}
static void WriteSelection(DFWINDOW wnd, int sel,
int reverse, DFRECT *rc)
{
if (isVisible(wnd))
if (SelectionInWindow(wnd, sel))
WriteTextLine(wnd, rc, sel, reverse);
}
#ifdef INCLUDE_EXTENDEDSELECTIONS
/* ----- Test for extended selections in the listbox ----- */
static void TestExtended(DFWINDOW wnd, PARAM p2)
{
if (isMultiLine(wnd) && !wnd->AddMode &&
!((int) p2 & (LEFTSHIFT | RIGHTSHIFT))) {
if (wnd->SelectCount > 1) {
ClearAllSelections(wnd);
DfSendMessage(wnd, PAINT, 0, 0);
}
}
}
/* ----- Clear selections in the listbox ----- */
static void ClearAllSelections(DFWINDOW wnd)
{
if (isMultiLine(wnd) && wnd->SelectCount > 0) {
int sel;
for (sel = 0; sel < wnd->wlines; sel++)
ClearSelection(wnd, sel);
}
}
/* ----- Invert a selection in the listbox ----- */
static void FlipSelection(DFWINDOW wnd, int sel)
{
if (isMultiLine(wnd)) {
if (ItemSelected(wnd, sel))
ClearSelection(wnd, sel);
else
SetSelection(wnd, sel);
}
}
static int ExtendSelections(DFWINDOW wnd, int sel, int shift)
{
if (shift & (LEFTSHIFT | RIGHTSHIFT) &&
wnd->AnchorPoint != -1) {
int i = sel;
int j = wnd->AnchorPoint;
int rtn;
if (j > i)
swap(i,j);
rtn = i - j;
while (j <= i)
SetSelection(wnd, j++);
return rtn;
}
return 0;
}
static void SetSelection(DFWINDOW wnd, int sel)
{
if (isMultiLine(wnd) && !ItemSelected(wnd, sel)) {
char *lp = TextLine(wnd, sel);
*lp = LISTSELECTOR;
wnd->SelectCount++;
}
}
static void ClearSelection(DFWINDOW wnd, int sel)
{
if (isMultiLine(wnd) && ItemSelected(wnd, sel)) {
char *lp = TextLine(wnd, sel);
*lp = ' ';
--wnd->SelectCount;
}
}
BOOL ItemSelected(DFWINDOW wnd, int sel)
{
if (sel != -1 && isMultiLine(wnd) && sel < wnd->wlines) {
char *cp = TextLine(wnd, sel);
return (int)((*cp) & 255) == LISTSELECTOR;
}
return FALSE;
}
#endif
static void ChangeSelection(DFWINDOW wnd,int sel,int shift)
{
if (sel != wnd->selection) {
#ifdef INCLUDE_EXTENDEDSELECTIONS
if (isMultiLine(wnd)) {
int sels;
if (!wnd->AddMode)
ClearAllSelections(wnd);
sels = ExtendSelections(wnd, sel, shift);
if (sels > 1)
DfSendMessage(wnd, PAINT, 0, 0);
if (sels == 0 && !wnd->AddMode) {
ClearSelection(wnd, wnd->selection);
SetSelection(wnd, sel);
wnd->AnchorPoint = sel;
}
}
#endif
WriteSelection(wnd, wnd->selection, FALSE, NULL);
wnd->selection = sel;
WriteSelection(wnd, sel, TRUE, NULL);
}
}
/* EOF */
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