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Added a "SelectionChanged" event to ListWindow

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This commit is contained in:
casey 2016-05-16 09:51:57 -07:00
parent d1f2d867f5
commit c259e911db
2 changed files with 21 additions and 7 deletions
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24
src/musikbox/ListWindow.cpp
View File

@ -13,14 +13,14 @@ ListWindow::~ListWindow() {
}
void ListWindow::ScrollToTop() {
this->selectedIndex = 0;
this->SetSelectedIndex(0);
this->GetScrollAdapter().DrawPage(this->GetContent(), 0, &scrollPosition);
this->Repaint();
}
void ListWindow::ScrollToBottom() {
IScrollAdapter& adapter = this->GetScrollAdapter();
this->selectedIndex = adapter.GetEntryCount() - 1;
this->SetSelectedIndex(max(0, adapter.GetEntryCount() - 1));
adapter.DrawPage(this->GetContent(), selectedIndex, &scrollPosition);
this->Repaint();
}
@ -48,9 +48,10 @@ void ListWindow::ScrollUp(int delta) {
drawIndex = newIndex - 1;
}
selectedIndex = newIndex;
drawIndex = max(0, drawIndex);
this->SetSelectedIndex(newIndex);
adapter.DrawPage(this->GetContent(), drawIndex, &this->scrollPosition);
this->Repaint();
@ -72,7 +73,7 @@ void ListWindow::ScrollDown(int delta) {
drawIndex = drawIndex + delta;
}
selectedIndex = newIndex;
this->SetSelectedIndex(newIndex);
adapter.DrawPage(this->GetContent(), drawIndex, &this->scrollPosition);
@ -88,7 +89,8 @@ void ListWindow::PageUp() {
the top of the list. otherwise, scroll down by one to give indication
there is more to see. */
target = (target > 0) ? target + 1 : 0;
this->selectedIndex = (target == 0) ? 0 : target + 1;
this->SetSelectedIndex((target == 0) ? 0 : target + 1);
adapter.DrawPage(this->GetContent(), target, &this->scrollPosition);
this->Repaint();
@ -102,12 +104,20 @@ void ListWindow::PageDown() {
ScrollPos spos = this->GetScrollPosition();
size_t lastVisible = spos.firstVisibleEntryIndex + spos.visibleEntryCount - 1;
this->selectedIndex = min(adapter.GetEntryCount() - 1, lastVisible + 1);
this->SetSelectedIndex(min(adapter.GetEntryCount() - 1, lastVisible + 1));
adapter.DrawPage(this->GetContent(), lastVisible, &this->scrollPosition);
this->Repaint();
}
void ListWindow::SetSelectedIndex(size_t index) {
if (this->selectedIndex != index) {
size_t prev = this->selectedIndex;
this->selectedIndex = index;
this->SelectionChanged(this, index, prev);
}
}
size_t ListWindow::GetSelectedIndex() {
return this->selectedIndex;
}

4
src/musikbox/ListWindow.h
View File

@ -3,9 +3,12 @@
#include "IScrollable.h"
#include "IScrollAdapter.h"
#include "ScrollableWindow.h"
#include <sigslot/sigslot.h>
class ListWindow : public ScrollableWindow {
public:
sigslot::signal3<ListWindow*, size_t, size_t> SelectionChanged;
ListWindow(IWindow *parent = NULL);
virtual ~ListWindow();
@ -20,6 +23,7 @@ class ListWindow : public ScrollableWindow {
virtual size_t GetSelectedIndex();
protected:
virtual void SetSelectedIndex(size_t index);
virtual void OnAdapterChanged();
virtual IScrollAdapter::ScrollPosition& GetScrollPosition();