static void
updateScrollerProportion(ScrollView *sPtr)
{
float prop, value;
float oldV, oldP;
if (sPtr->flags.hasHScroller) {
oldV = WMGetScrollerValue(sPtr->hScroller);
oldP = WMGetScrollerKnobProportion(sPtr->hScroller);
prop = (float)sPtr->viewport->size.width/(float)sPtr->contentView->size.width;
if (oldP == 1.0)
value = 0;
else
value = (prop * oldV) / oldP;
WMSetScrollerParameters(sPtr->hScroller, value, prop);
}
if (sPtr->flags.hasVScroller) {
oldV = WMGetScrollerValue(sPtr->vScroller);
oldP = WMGetScrollerKnobProportion(sPtr->vScroller);
prop = (float)sPtr->viewport->size.height/(float)sPtr->contentView->size.height;
if (oldP == 1.0)
value = 0;
else
value = (prop * oldV) / oldP;
WMSetScrollerParameters(sPtr->vScroller, value, prop);
}
applyScrollerValues(sPtr);
}
static void scrollToColumn(WMBrowser * bPtr, int column, Bool updateScroller)
{
int i;
int x;
int notify = 0;
if (column != bPtr->firstVisibleColumn) {
notify = 1;
}
if (column < 0)
column = 0;
if (notify && bPtr->delegate && bPtr->delegate->willScroll) {
(*bPtr->delegate->willScroll) (bPtr->delegate, bPtr);
}
x = 0;
bPtr->firstVisibleColumn = column;
for (i = 0; i < bPtr->columnCount; i++) {
if (COLUMN_IS_VISIBLE(bPtr, i)) {
WMMoveWidget(bPtr->columns[i], x, WMWidgetView(bPtr->columns[i])->pos.y);
if (!WMWidgetView(bPtr->columns[i])->flags.realized)
WMRealizeWidget(bPtr->columns[i]);
WMMapWidget(bPtr->columns[i]);
x += bPtr->columnSize.width + COLUMN_SPACING;
} else {
WMUnmapWidget(bPtr->columns[i]);
}
}
/* update the scroller */
if (updateScroller) {
if (bPtr->columnCount > bPtr->maxVisibleColumns) {
float value, proportion;
value = bPtr->firstVisibleColumn / (float)(bPtr->columnCount - bPtr->maxVisibleColumns);
proportion = bPtr->maxVisibleColumns / (float)bPtr->columnCount;
WMSetScrollerParameters(bPtr->scroller, value, proportion);
} else {
WMSetScrollerParameters(bPtr->scroller, 0, 1);
}
}
if (bPtr->view->flags.mapped)
paintBrowser(bPtr);
if (notify && bPtr->delegate && bPtr->delegate->didScroll) {
(*bPtr->delegate->didScroll) (bPtr->delegate, bPtr);
}
}
void
WMScrollViewScrollPoint(WMScrollView *sPtr, WMPoint point)
{
float xsize, ysize;
float xpos, ypos;
xsize = sPtr->contentView->size.width-sPtr->viewport->size.width;
ysize = sPtr->contentView->size.height-sPtr->viewport->size.height;
xpos = point.x / xsize;
ypos = point.y / ysize;
if (sPtr->hScroller)
WMSetScrollerParameters(sPtr->hScroller, xpos,
WMGetScrollerKnobProportion(sPtr->hScroller));
if (sPtr->vScroller)
WMSetScrollerParameters(sPtr->vScroller, ypos,
WMGetScrollerKnobProportion(sPtr->vScroller));
W_MoveView(sPtr->contentView, -point.x, -point.y);
}
void
WMSetScrollViewContentView(WMScrollView *sPtr, WMView *view)
{
assert(sPtr->contentView == NULL);
sPtr->contentView = view;
W_ReparentView(sPtr->contentView, sPtr->viewport, 0, 0);
if (sPtr->flags.hasHScroller) {
float prop;
prop = (float)sPtr->viewport->size.width/sPtr->contentView->size.width;
WMSetScrollerParameters(sPtr->hScroller, 0, prop);
}
if (sPtr->flags.hasVScroller) {
float prop;
prop = (float)sPtr->viewport->size.height/sPtr->contentView->size.height;
WMSetScrollerParameters(sPtr->vScroller, 0, prop);
}
}
static void handleMotion(Scroller * sPtr, int mouseX, int mouseY)
{
if (sPtr->flags.draggingKnob) {
float newFloatValue;
int point;
if (sPtr->flags.horizontal) {
point = mouseX;
} else {
point = mouseY;
}
#ifndef STRICT_NEXT_BEHAVIOUR
point -= sPtr->dragPoint;
#endif
newFloatValue = floatValueForPoint(sPtr, point);
WMSetScrollerParameters(sPtr, newFloatValue, sPtr->knobProportion);
if (sPtr->action) {
(*sPtr->action) (sPtr, sPtr->clientData);
WMPostNotificationName(WMScrollerDidScrollNotification, sPtr, NULL);
}
} else {
int part;
part = locatePointInScroller(sPtr, mouseX, mouseY, False);
sPtr->flags.hitPart = part;
if (part == WSIncrementLine && sPtr->flags.decrDown) {
sPtr->flags.decrDown = 0;
sPtr->flags.incrDown = 1;
} else if (part == WSDecrementLine && sPtr->flags.incrDown) {
sPtr->flags.incrDown = 0;
sPtr->flags.decrDown = 1;
} else if (part != WSIncrementLine && part != WSDecrementLine) {
sPtr->flags.incrDown = 0;
sPtr->flags.decrDown = 0;
}
}
}
int WMAddBrowserColumn(WMBrowser * bPtr)
{
WMList *list;
WMList **clist;
char **tlist;
int colY;
int index;
if (bPtr->usedColumnCount < bPtr->columnCount) {
return bPtr->usedColumnCount++;
}
bPtr->usedColumnCount++;
if (bPtr->flags.isTitled) {
colY = TITLE_SPACING + bPtr->titleHeight;
} else {
colY = 0;
}
index = bPtr->columnCount;
bPtr->columnCount++;
clist = wmalloc(sizeof(WMList *) * bPtr->columnCount);
tlist = wmalloc(sizeof(char *) * bPtr->columnCount);
memcpy(clist, bPtr->columns, sizeof(WMList *) * (bPtr->columnCount - 1));
memcpy(tlist, bPtr->titles, sizeof(char *) * (bPtr->columnCount - 1));
if (bPtr->columns)
wfree(bPtr->columns);
if (bPtr->titles)
wfree(bPtr->titles);
bPtr->columns = clist;
bPtr->titles = tlist;
bPtr->titles[index] = NULL;
list = WMCreateList(bPtr);
WMSetListAllowMultipleSelection(list, bPtr->flags.allowMultipleSelection);
WMSetListAllowEmptySelection(list, bPtr->flags.allowEmptySelection);
WMSetListAction(list, listCallback, bPtr);
WMSetListDoubleAction(list, listDoubleCallback, bPtr);
WMSetListUserDrawProc(list, paintItem);
WMAddNotificationObserver(listSelectionObserver, bPtr, WMListSelectionDidChangeNotification, list);
bPtr->columns[index] = list;
WMResizeWidget(list, bPtr->columnSize.width, bPtr->columnSize.height);
WMMoveWidget(list, (bPtr->columnSize.width + COLUMN_SPACING) * index, colY);
if (COLUMN_IS_VISIBLE(bPtr, index))
WMMapWidget(list);
/* update the scroller */
if (bPtr->columnCount > bPtr->maxVisibleColumns) {
float value, proportion;
value = bPtr->firstVisibleColumn / (float)(bPtr->columnCount - bPtr->maxVisibleColumns);
proportion = bPtr->maxVisibleColumns / (float)bPtr->columnCount;
WMSetScrollerParameters(bPtr->scroller, value, proportion);
}
return index;
}
static void
doScrolling(WMWidget *self, void *data)
{
ScrollView *sPtr = (ScrollView*)data;
float value;
int pos;
int vpsize;
float size;
if (sPtr->hScroller == (WMScroller *)self) {
pos = -sPtr->contentView->pos.x;
size = sPtr->contentView->size.width-sPtr->viewport->size.width;
vpsize = sPtr->viewport->size.width - sPtr->pageScroll;
} else {
pos = -sPtr->contentView->pos.y;
size = sPtr->contentView->size.height-sPtr->viewport->size.height;
vpsize = sPtr->viewport->size.height - sPtr->pageScroll;
}
if (vpsize <= 0)
vpsize = 1;
switch (WMGetScrollerHitPart(self)) {
case WSDecrementLine:
if (pos > 0) {
pos-=sPtr->lineScroll;
if (pos < 0)
pos = 0;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSIncrementLine:
if (pos < size) {
pos+=sPtr->lineScroll;
if (pos > size)
pos = size;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSKnob:
value = WMGetScrollerValue(self);
pos = value*size;
break;
case WSDecrementPage:
if (pos > 0) {
pos -= vpsize;
if (pos < 0)
pos = 0;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSDecrementWheel:
if (pos > 0) {
pos -= vpsize/3;
if (pos < 0)
pos = 0;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSIncrementPage:
if (pos < size) {
pos += vpsize;
if (pos > size)
pos = size;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSIncrementWheel:
if (pos < size) {
pos += vpsize/3;
if (pos > size)
pos = size;
value = (float)pos / size;
WMSetScrollerParameters(self, value,
WMGetScrollerKnobProportion(self));
}
break;
case WSNoPart:
case WSKnobSlot:
break;
}
if (sPtr->hScroller == (WMScroller *)self) {
W_MoveView(sPtr->contentView, -pos, sPtr->contentView->pos.y);
} else {
W_MoveView(sPtr->contentView, sPtr->contentView->pos.x, -pos);
}
}