* Copyright 2006-2010 Stephan Aßmus <superstippi@gmx.de>
* All rights reserved. Distributed under the terms of the MIT License.
*/
#include "SeekSlider.h"
#include <stdio.h>
#include <string.h>
#include <ControlLook.h>
#include <Region.h>
#include <Shape.h>
static const rgb_color kThumbRed = (rgb_color){ 255, 52, 52, 255 };
SeekSlider::SeekSlider(const char* name, BMessage* message, BMessage* hoverMessage,
int32 minValue, int32 maxValue)
:
BSlider(name, NULL, NULL, minValue, maxValue, B_HORIZONTAL,
B_TRIANGLE_THUMB),
fHoverMessage(hoverMessage),
fTracking(false),
fLastTrackTime(0),
fDisabledString(""),
fScale(0.0f)
{
BFont font(be_plain_font);
font.SetSize(font.Size() * 0.75f);
SetFont(&font);
SetSymbolScale(1.0);
rgb_color fillColor = tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
B_DARKEN_3_TINT);
UseFillColor(true, &fillColor);
SetModificationMessage(message);
}
SeekSlider::~SeekSlider()
{
}
status_t
SeekSlider::Invoke(BMessage* message)
{
fLastTrackTime = system_time();
return BSlider::Invoke(message);
}
BRect
SeekSlider::ThumbFrame() const
{
BRect frame = BSlider::ThumbFrame();
float center = (frame.left + frame.right) / 2.0f;
float height = ceilf(frame.Height() * fScale);
float width = ceilf(frame.Width() * fScale);
frame.left = floorf(center - width / 2) + 1;
frame.right = frame.left + width;
frame.bottom = frame.top + height;
return frame;
}
void
SeekSlider::DrawBar()
{
BSlider::DrawBar();
if (IsEnabled())
return;
BRect r(BarFrame());
font_height fh;
GetFontHeight(&fh);
float width = ceilf(StringWidth(fDisabledString.String()));
BPoint textPos;
textPos.x = r.left + (r.Width() - width) / 2.0;
textPos.y = (r.top + r.bottom - ceilf(fh.ascent + fh.descent)) / 2.0
+ ceilf(fh.ascent);
SetHighColor(tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
B_DARKEN_3_TINT));
SetDrawingMode(B_OP_OVER);
DrawString(fDisabledString.String(), textPos);
}
void
SeekSlider::DrawThumb()
{
if (!IsEnabled())
return;
BRect frame = ThumbFrame();
be_control_look->DrawSliderTriangle(this, frame, frame, kThumbRed, 0,
B_HORIZONTAL);
}
void
SeekSlider::MouseDown(BPoint where)
{
if (IsEnabled())
fTracking = true;
BSlider::MouseDown(where);
}
void
SeekSlider::MouseUp(BPoint where)
{
fTracking = false;
BSlider::MouseUp(where);
}
void
SeekSlider::MouseMoved(BPoint point, uint32 transit, const BMessage* dragMessage)
{
if (fHoverMessage != NULL) {
fHoverMessage->SetInt32("value", ValueForPoint(point));
BControl::Invoke(fHoverMessage);
}
BSlider::MouseMoved(point, transit, dragMessage);
}
void
SeekSlider::GetPreferredSize(float* _width, float* _height)
{
BSlider::GetPreferredSize(_width, _height);
if (_width != NULL) {
float minWidth = 15.0 + StringWidth(fDisabledString.String()) + 15.0;
*_width = max_c(*_width, minWidth);
}
if (_height != NULL) {
BRect unscaledThumbFrame = BSlider::ThumbFrame();
BRect scaledThumbFrame = ThumbFrame();
*_height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
}
}
BSize
SeekSlider::MinSize()
{
BSize size = BSlider::MinSize();
BRect unscaledThumbFrame = BSlider::ThumbFrame();
BRect scaledThumbFrame = ThumbFrame();
size.height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
return size;
}
BSize
SeekSlider::MaxSize()
{
BSize size = BSlider::MaxSize();
BRect unscaledThumbFrame = BSlider::ThumbFrame();
BRect scaledThumbFrame = ThumbFrame();
size.height += scaledThumbFrame.Height() - unscaledThumbFrame.Height();
return size;
}
bool
SeekSlider::IsTracking() const
{
if (fTracking)
return true;
return system_time() - fLastTrackTime < 250000;
}
void
SeekSlider::SetDisabledString(const char* string)
{
if (string == NULL)
string = "";
if (fDisabledString == string)
return;
fDisabledString = string;
if (!IsEnabled())
Invalidate();
}
void
SeekSlider::SetSymbolScale(float scale)
{
if (scale == fScale)
return;
fScale = scale;
SetBarThickness(fScale * 15.0);
InvalidateLayout();
}
