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grid: autohide scrollbars

This commit is contained in:
Vadim Lopatin 2014-06-05 14:11:09 +04:00
parent 10ea52c9bd
commit 52824b85b5
2 changed files with 45 additions and 3 deletions
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19
src/dlangui/widgets/controls.d
View File

@ -644,6 +644,24 @@ class ScrollBar : AbstractSlider, OnClickHandler {
layoutButtons();
}
/// hide controls when scroll is not possible
protected void updateState() {
bool canScroll = _maxValue - _minValue > _pageSize;
if (canScroll) {
_btnBack.setState(State.Enabled);
_btnForward.setState(State.Enabled);
_indicator.visibility = Visibility.Visible;
_pageUp.visibility = Visibility.Visible;
_pageDown.visibility = Visibility.Visible;
} else {
_btnBack.resetState(State.Enabled);
_btnForward.resetState(State.Enabled);
_indicator.visibility = Visibility.Gone;
_pageUp.visibility = Visibility.Gone;
_pageDown.visibility = Visibility.Gone;
}
}
protected void layoutButtons() {
Rect irc = _scrollArea;
if (_orientation == Orientation.Vertical) {
@ -661,6 +679,7 @@ class ScrollBar : AbstractSlider, OnClickHandler {
irc.right -= spaceForwardSize;
layoutButtons(irc);
}
updateState();
}
protected void layoutButtons(Rect irc) {

29
src/dlangui/widgets/grid.d
View File

@ -773,6 +773,15 @@ class StringGridWidget : GridWidgetBase, OnScrollHandler {
//fnt.drawText(buf, rc.left, rc.top, "row"d, 0x000000);
}
Point fullContentSize() {
Point sz;
for (int i = 0; i < _cols; i++)
sz.x += _colWidths[i];
for (int i = 0; i < _rows; i++)
sz.y += _rowHeights[i];
return sz;
}
/// Measure widget according to desired width and height constraints. (Step 1 of two phase layout).
override void measure(int parentWidth, int parentHeight) {
Rect m = margins;
@ -786,7 +795,8 @@ class StringGridWidget : GridWidgetBase, OnScrollHandler {
pheight -= m.top + m.bottom + p.top + p.bottom;
_hscrollbar.measure(pwidth, pheight);
_vscrollbar.measure(pwidth, pheight);
measuredContent(parentWidth, parentHeight, 100, 100);
Point sz = fullContentSize();
measuredContent(parentWidth, parentHeight, sz.x, sz.y);
}
protected Rect _clientRect;
@ -800,6 +810,15 @@ class StringGridWidget : GridWidgetBase, OnScrollHandler {
_needLayout = false;
applyMargins(rc);
applyPadding(rc);
Point sz = fullContentSize();
bool needHscroll = sz.x > rc.width;
bool needVscroll = sz.y > rc.height;
if (needVscroll)
needHscroll = sz.x > rc.width - _vscrollbar.measuredWidth;
if (needHscroll)
needVscroll = sz.y > rc.height - _hscrollbar.measuredHeight;
if (needVscroll)
needHscroll = sz.x > rc.width - _vscrollbar.measuredWidth;
// scrollbars
Rect vsbrc = rc;
vsbrc.left = vsbrc.right - _vscrollbar.measuredWidth;
@ -809,10 +828,14 @@ class StringGridWidget : GridWidgetBase, OnScrollHandler {
hsbrc.top = hsbrc.bottom - _hscrollbar.measuredHeight;
_vscrollbar.layout(vsbrc);
_hscrollbar.layout(hsbrc);
_vscrollbar.visibility = needVscroll ? Visibility.Visible : Visibility.Gone;
_hscrollbar.visibility = needHscroll ? Visibility.Visible : Visibility.Gone;
// client area
_clientRect = rc;
_clientRect.right = vsbrc.left;
_clientRect.bottom = hsbrc.top;
if (needVscroll)
_clientRect.right = vsbrc.left;
if (needHscroll)
_clientRect.bottom = hsbrc.top;
updateScrollBars();
}