#include <stdio.h>

#include <Application.h>
#include <ScrollBar.h>
#include <ScrollView.h>
#include <Window.h>

class View : public BView {
public:
        View(BRect frame)
                : BView(frame, "target view", B_FOLLOW_ALL,
                        B_WILL_DRAW | B_FRAME_EVENTS)
        {
        }

        virtual void Draw(BRect updateRect)
        {
                BRect b = Bounds().OffsetToCopy(B_ORIGIN);
                b.bottom = b.bottom * 2.0;
                StrokeLine(b.LeftTop(), b.RightBottom());
        }

        virtual void AttachedToWindow()
        {
                UpdateScrollbar(Bounds().Height());
        }

        virtual void FrameResized(float width, float height)
        {
                UpdateScrollbar(height);
        }

        void UpdateScrollbar(float height)
        {
                BScrollBar* scrollBar = ScrollBar(B_VERTICAL);
                if (!scrollBar) {
                        printf("no vertical scroll bar\n");
                        return;
                }
                float smallStep, bigStep;
                scrollBar->GetSteps(&smallStep, &bigStep);
                printf("scrollbar steps: %.1f, %.1f, proportion: %.1f\n",
                        smallStep, bigStep, scrollBar->Proportion());

                scrollBar->SetRange(0.0, height);
                scrollBar->SetSteps(5.0, height / 2);

                scrollBar->GetSteps(&smallStep, &bigStep);
                printf("scrollbar steps: %.1f, %.1f, proportion: %.1f, "
                        "range: %.1f\n",
                        smallStep, bigStep, scrollBar->Proportion(),
                        height);
        }
};


int
main(int argc, char* argv[])
{
        BApplication app("application/x-vnd.stippi.scrollbar_test");

        BRect frame(50, 50, 350, 350);
        BWindow* window = new BWindow(frame, "BScrollBar Test",
                B_TITLED_WINDOW_LOOK, B_NORMAL_WINDOW_FEEL,
                B_ASYNCHRONOUS_CONTROLS | B_QUIT_ON_WINDOW_CLOSE);

        frame = window->Bounds();
        frame.right -= B_V_SCROLL_BAR_WIDTH;
        View* view = new View(frame);

        BScrollView* scrollView = new BScrollView("scroll view", view,
                B_FOLLOW_ALL, 0, false, true, B_NO_BORDER);

        window->AddChild(scrollView);
        window->Show();

        app.Run();
        return 0;
}