ref: 2188f8d1a43f48b69a1eff53ea66724dece817b7
dir: /src/ft2_scrollbars.c/
// for finding memory leaks in debug mode with Visual Studio
#if defined _DEBUG && defined _MSC_VER
#include <crtdbg.h>
#endif
#include <stdint.h>
#include <stdbool.h>
#include "ft2_header.h"
#include "ft2_gui.h"
#include "ft2_config.h"
#include "ft2_audio.h"
#include "ft2_help.h"
#include "ft2_sample_ed.h"
#include "ft2_inst_ed.h"
#include "ft2_diskop.h"
#include "ft2_pattern_ed.h"
#include "ft2_audioselector.h"
#include "ft2_midi.h"
#include "ft2_mouse.h"
#include "ft2_video.h"
#include "ft2_palette.h"
/* Prevent the scrollbar thumbs from being so small that
** it's difficult to use them. In units of pixels.
** Shouldn't be higher than 9!
*/
#define MIN_THUMB_LENGTH 5
scrollBar_t scrollBars[NUM_SCROLLBARS] =
{
// ------ RESERVED SCROLLBARS ------
{ 0 }, { 0 }, { 0 },
/*
** -- STRUCT INFO: --
** x = x position
** y = y position
** w = width
** h = height
** type = scrollbar type (vertical/horizontal)
** style = scrollbar style (flat/noflat)
** funcOnDown = function to call when pressed
*/
// ------ POSITION EDITOR SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 55, 15, 18, 21, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbPosEdPos },
// ------ INSTRUMENT SWITCHER SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 566, 112, 18, 28, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbSmpBankPos },
// ------ PATTERN VIEWER SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 28, 385, 576, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_FLAT, setChannelScrollPos },
// ------ HELP SCREEN SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 611, 15, 18, 143, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, helpScrollSetPos },
// ------ SAMPLE EDITOR SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 26, 331, 580, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_FLAT, scrollSampleData },
// ------ INSTRUMENT EDITOR SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 544, 175, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setVolumeScroll },
{ 544, 189, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setPanningScroll },
{ 544, 203, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setFinetuneScroll },
{ 544, 220, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setFadeoutScroll },
{ 544, 234, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setVibSpeedScroll },
{ 544, 248, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setVibDepthScroll },
{ 544, 262, 62, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, setVibSweepScroll },
// ------ INSTRUMENT EDITOR EXTENSION SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 195, 130, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbMidiChPos },
{ 195, 144, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbMidiPrgPos },
{ 195, 158, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbMidiBendPos },
// ------ CONFIG AUDIO SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 365, 29, 18, 43, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbAudOutputSetPos },
{ 365, 116, 18, 21, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbAudInputSetPos },
{ 529, 132, 79, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbAmp },
{ 529, 158, 79, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbMasterVol },
// ------ CONFIG LAYOUT SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 536, 15, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbPalRPos },
{ 536, 29, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbPalGPos },
{ 536, 43, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbPalBPos },
{ 536, 71, 70, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbPalContrastPos },
// ------ CONFIG MISCELLANEOUS SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 578, 158, 29, 13, SCROLLBAR_HORIZONTAL, SCROLLBAR_THUMB_NOFLAT, sbMIDISens },
#ifdef HAS_MIDI
// ------ CONFIG MIDI SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 483, 15, 18, 143, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbMidiInputSetPos },
#endif
// ------ DISK OP. SCROLLBARS ------
//x, y, w, h, type, style funcOnDown
{ 335, 15, 18, 143, SCROLLBAR_VERTICAL, SCROLLBAR_THUMB_FLAT, sbDiskOpSetPos }
};
void drawScrollBar(uint16_t scrollBarID)
{
int16_t thumbX, thumbY, thumbW, thumbH;
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
if (!scrollBar->visible)
return;
assert(scrollBar->x < SCREEN_W && scrollBar->y < SCREEN_H && scrollBar->w >= 3 && scrollBar->h >= 3);
thumbX = scrollBar->thumbX;
thumbY = scrollBar->thumbY;
thumbW = scrollBar->thumbW;
thumbH = scrollBar->thumbH;
// clear scrollbar background (lazy, but sometimes even faster than filling bg gaps)
clearRect(scrollBar->x, scrollBar->y, scrollBar->w, scrollBar->h);
// draw thumb
if (scrollBar->thumbType == SCROLLBAR_THUMB_FLAT)
{
// flat
fillRect(thumbX, thumbY, thumbW, thumbH, PAL_PATTEXT);
}
else
{
// 3D
fillRect(thumbX, thumbY, thumbW, thumbH, PAL_BUTTONS);
if (scrollBar->state == SCROLLBAR_UNPRESSED)
{
// top left corner inner border
hLine(thumbX, thumbY, thumbW - 1, PAL_BUTTON1);
vLine(thumbX, thumbY + 1, thumbH - 2, PAL_BUTTON1);
// bottom right corner inner border
hLine(thumbX, thumbY + thumbH - 1, thumbW - 1, PAL_BUTTON2);
vLine(thumbX + thumbW - 1, thumbY, thumbH, PAL_BUTTON2);
}
else
{
// top left corner inner border
hLine(thumbX, thumbY, thumbW, PAL_BUTTON2);
vLine(thumbX, thumbY + 1, thumbH - 1, PAL_BUTTON2);
}
}
}
void showScrollBar(uint16_t scrollBarID)
{
assert(scrollBarID < NUM_SCROLLBARS);
scrollBars[scrollBarID].visible = true;
drawScrollBar(scrollBarID);
}
void hideScrollBar(uint16_t scrollBarID)
{
assert(scrollBarID < NUM_SCROLLBARS);
scrollBars[scrollBarID].state = 0;
scrollBars[scrollBarID].visible = false;
}
static void setScrollBarThumbCoords(uint16_t scrollBarID)
{
int16_t thumbX, thumbY, thumbW, thumbH, scrollEnd, realThumbLength;
int32_t tmp32, length, end;
double dTmp;
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
assert(scrollBar->page > 0);
// uninitialized scrollbar, set full thumb length/height
if (scrollBar->end == 0)
{
scrollBar->thumbX = scrollBar->x + 1;
scrollBar->thumbY = scrollBar->y + 1;
scrollBar->thumbW = scrollBar->w - 2;
scrollBar->thumbH = scrollBar->h - 2;
return;
}
if (scrollBar->type == SCROLLBAR_HORIZONTAL)
{
// horizontal scrollbar
thumbY = scrollBar->y + 1;
thumbH = scrollBar->h - 2;
scrollEnd = scrollBar->x + scrollBar->w;
if (scrollBar->thumbType == SCROLLBAR_THUMB_NOFLAT)
{
realThumbLength = 15;
thumbW = realThumbLength;
if (thumbW < MIN_THUMB_LENGTH)
thumbW = MIN_THUMB_LENGTH;
if (scrollBar->end > 0)
{
length = scrollBar->w - realThumbLength;
dTmp = (length / (double)scrollBar->end) * scrollBar->pos;
tmp32 = (int32_t)(dTmp + 0.5);
thumbX = (int16_t)(scrollBar->x + tmp32);
}
else
{
thumbX = scrollBar->x;
}
}
else
{
if (scrollBar->end > 0)
{
dTmp = (scrollBar->w / (double)scrollBar->end) * scrollBar->page;
tmp32 = (int32_t)(dTmp + 0.5);
realThumbLength = (int16_t)CLAMP(tmp32, 1, scrollBar->w);
}
else
{
realThumbLength = 1;
}
thumbW = realThumbLength;
if (thumbW < MIN_THUMB_LENGTH)
thumbW = MIN_THUMB_LENGTH;
if (scrollBar->end > scrollBar->page)
{
length = scrollBar->w - thumbW;
end = scrollBar->end - scrollBar->page;
dTmp = (length / (double)end) * scrollBar->pos;
tmp32 = (int32_t)(dTmp + 0.5);
thumbX = (int16_t)(scrollBar->x + tmp32);
}
else
{
thumbX = scrollBar->x;
}
}
// prevent scrollbar thumb coords from being outside of the scrollbar area
thumbX = CLAMP(thumbX, scrollBar->x, scrollEnd-1);
if (thumbX+thumbW > scrollEnd)
thumbW = scrollEnd - thumbX;
}
else
{
// vertical scrollbar
thumbX = scrollBar->x + 1;
thumbW = scrollBar->w - 2;
scrollEnd = scrollBar->y + scrollBar->h;
if (scrollBar->end > 0)
{
dTmp = (scrollBar->h / (double)scrollBar->end) * scrollBar->page;
tmp32 = (int32_t)(dTmp + 0.5);
realThumbLength = (int16_t)CLAMP(tmp32, 1, scrollBar->h);
}
else
{
realThumbLength = 1;
}
thumbH = realThumbLength;
if (thumbH < MIN_THUMB_LENGTH)
thumbH = MIN_THUMB_LENGTH;
if (scrollBar->end > scrollBar->page)
{
length = scrollBar->h - thumbH;
end = scrollBar->end - scrollBar->page;
dTmp = (length / (double)end) * scrollBar->pos;
tmp32 = (int32_t)(dTmp + 0.5);
thumbY = (int16_t)(scrollBar->y + tmp32);
}
else
{
thumbY = scrollBar->y;
}
// prevent scrollbar thumb coords from being outside of the scrollbar area
thumbY = CLAMP(thumbY, scrollBar->y, scrollEnd - 1);
if (thumbY+thumbH > scrollEnd)
thumbH = scrollEnd - thumbY;
}
// set values now
scrollBar->realThumbLength = realThumbLength;
scrollBar->thumbX = thumbX;
scrollBar->thumbY = thumbY;
scrollBar->thumbW = thumbW;
scrollBar->thumbH = thumbH;
}
void scrollBarScrollUp(uint16_t scrollBarID, uint32_t amount)
{
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
assert(scrollBar->page > 0 && scrollBar->end > 0);
if (scrollBar->end < scrollBar->page || scrollBar->pos == 0)
return;
if (scrollBar->pos >= amount)
scrollBar->pos -= amount;
else
scrollBar->pos = 0;
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
if (scrollBar->callbackFunc != NULL)
scrollBar->callbackFunc(scrollBar->pos);
}
void scrollBarScrollDown(uint16_t scrollBarID, uint32_t amount)
{
uint32_t endPos;
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
assert(scrollBar->page > 0 && scrollBar->end > 0);
if (scrollBar->end < scrollBar->page)
return;
endPos = scrollBar->end;
if (scrollBar->thumbType == SCROLLBAR_THUMB_FLAT)
{
if (endPos >= scrollBar->page)
endPos -= scrollBar->page;
else
endPos = 0;
}
// check if we're already at the end
if (scrollBar->pos == endPos)
return;
scrollBar->pos += amount;
if (scrollBar->pos > endPos)
scrollBar->pos = endPos;
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
if (scrollBar->callbackFunc != NULL)
scrollBar->callbackFunc(scrollBar->pos);
}
void scrollBarScrollLeft(uint16_t scrollBarID, uint32_t amount)
{
scrollBarScrollUp(scrollBarID, amount);
}
void scrollBarScrollRight(uint16_t scrollBarID, uint32_t amount)
{
scrollBarScrollDown(scrollBarID, amount);
}
void setScrollBarPos(uint16_t scrollBarID, uint32_t pos, bool triggerCallBack)
{
uint32_t endPos;
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
if (scrollBar->oldPos == pos)
return;
scrollBar->oldPos = pos;
if (scrollBar->page == 0)
{
scrollBar->pos = 0;
return;
}
if (scrollBar->end < scrollBar->page || scrollBar->pos == pos)
{
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
return;
}
endPos = scrollBar->end;
if (scrollBar->thumbType == SCROLLBAR_THUMB_FLAT)
{
if (endPos >= scrollBar->page)
endPos -= scrollBar->page;
else
endPos = 0;
}
scrollBar->pos = pos;
if (scrollBar->pos > endPos)
scrollBar->pos = endPos;
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
if (triggerCallBack && scrollBar->callbackFunc != NULL)
scrollBar->callbackFunc(scrollBar->pos);
}
uint32_t getScrollBarPos(uint16_t scrollBarID)
{
assert(scrollBarID < NUM_SCROLLBARS);
return scrollBars[scrollBarID].pos;
}
void setScrollBarEnd(uint16_t scrollBarID, uint32_t end)
{
uint8_t setPos;
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
if (end < 1)
end = 1;
if (scrollBar->oldEnd == end)
return;
scrollBar->oldEnd = end;
scrollBar->end = end;
setPos = false;
if (scrollBar->pos >= end)
{
scrollBar->pos = end - 1;
setPos = true;
}
if (scrollBar->page > 0)
{
if (setPos)
{
setScrollBarPos(scrollBarID, scrollBar->pos, false);
// this will also call setScrollBarThumbCoords() and drawScrollBar()
}
else
{
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
}
}
}
void setScrollBarPageLength(uint16_t scrollBarID, uint32_t pageLength)
{
scrollBar_t *scrollBar;
assert(scrollBarID < NUM_SCROLLBARS);
scrollBar = &scrollBars[scrollBarID];
if (pageLength < 1)
pageLength = 1;
if (scrollBar->oldPage == pageLength)
return;
scrollBar->oldPage = pageLength;
scrollBar->page = pageLength;
if (scrollBar->end > 0)
{
setScrollBarPos(scrollBarID, scrollBar->pos, false);
setScrollBarThumbCoords(scrollBarID);
drawScrollBar(scrollBarID);
}
}
bool testScrollBarMouseDown(void)
{
uint16_t start, end;
int32_t scrollPos, length;
double dTmp;
scrollBar_t *scrollBar;
if (editor.ui.sysReqShown)
{
// if a system request is open, only test the first three scrollbars (reserved)
start = 0;
end = 3;
}
else
{
start = 3;
end = NUM_SCROLLBARS;
}
for (uint16_t i = start; i < end; i++)
{
scrollBar = &scrollBars[i];
if (!scrollBar->visible)
continue;
if (mouse.x >= scrollBar->x && mouse.x < scrollBar->x+scrollBar->w &&
mouse.y >= scrollBar->y && mouse.y < scrollBar->y+scrollBar->h)
{
mouse.lastUsedObjectID = i;
mouse.lastUsedObjectType = OBJECT_SCROLLBAR;
// kludge for when a system request is about to open
scrollBar->state = SCROLLBAR_PRESSED;
if (scrollBar->thumbType == SCROLLBAR_THUMB_NOFLAT)
drawScrollBar(mouse.lastUsedObjectType);
if (scrollBar->type == SCROLLBAR_HORIZONTAL)
{
mouse.lastScrollXTmp = mouse.lastScrollX = mouse.x;
if (mouse.x >= scrollBar->thumbX && mouse.x < scrollBar->thumbX+scrollBar->thumbW)
{
mouse.saveMouseX = mouse.lastScrollX - scrollBar->thumbX;
}
else
{
mouse.saveMouseX = scrollBar->thumbW >> 1;
scrollPos = mouse.lastScrollX - scrollBar->x - mouse.saveMouseX;
if (scrollBar->thumbType == SCROLLBAR_THUMB_NOFLAT)
{
dTmp = scrollPos * (scrollBar->w / (double)(scrollBar->w - scrollBar->thumbW));
scrollPos = (int32_t)(dTmp + 0.5);
}
assert(scrollBar->w > 0);
scrollPos = CLAMP(scrollPos, 0, scrollBar->w);
length = scrollBar->w + (scrollBar->realThumbLength - scrollBar->thumbW);
if (length < 1)
length = 1;
dTmp = ((double)scrollPos * scrollBar->end) / length;
scrollPos = (int32_t)(dTmp + 0.5);
setScrollBarPos(mouse.lastUsedObjectID, scrollPos, true);
}
}
else
{
mouse.lastScrollY = mouse.y;
if (mouse.y >= scrollBar->thumbY && mouse.y < scrollBar->thumbY+scrollBar->thumbH)
{
mouse.saveMouseY = mouse.lastScrollY - scrollBar->thumbY;
}
else
{
mouse.saveMouseY = scrollBar->thumbH >> 1;
scrollPos = mouse.lastScrollY - scrollBar->y - mouse.saveMouseY;
assert(scrollBar->h > 0);
scrollPos = CLAMP(scrollPos, 0, scrollBar->h);
length = scrollBar->h + (scrollBar->realThumbLength - scrollBar->thumbH);
if (length < 1)
length = 1;
dTmp = ((double)scrollPos * scrollBar->end) / length;
scrollPos = (int32_t)(dTmp + 0.5);
setScrollBarPos(mouse.lastUsedObjectID, scrollPos, true);
}
}
// objectID can be set to none in scrollbar's callback during setScrollBarPos()
if (mouse.lastUsedObjectID == OBJECT_ID_NONE)
return true;
scrollBar->state = SCROLLBAR_PRESSED;
if (scrollBar->thumbType == SCROLLBAR_THUMB_NOFLAT)
drawScrollBar(mouse.lastUsedObjectID);
return true;
}
}
return false;
}
void testScrollBarMouseRelease(void)
{
scrollBar_t *scrollBar;
if (mouse.lastUsedObjectType != OBJECT_SCROLLBAR || mouse.lastUsedObjectID == OBJECT_ID_NONE)
return;
assert(mouse.lastUsedObjectID < NUM_SCROLLBARS);
scrollBar = &scrollBars[mouse.lastUsedObjectID];
if (scrollBar->visible)
{
scrollBar->state = SCROLLBAR_UNPRESSED;
drawScrollBar(mouse.lastUsedObjectID);
}
}
void handleScrollBarsWhileMouseDown(void)
{
int32_t scrollX, scrollY, length;
double dTmp;
scrollBar_t *scrollBar;
assert(mouse.lastUsedObjectID >= 0 && mouse.lastUsedObjectID < NUM_SCROLLBARS);
scrollBar = &scrollBars[mouse.lastUsedObjectID];
if (!scrollBar->visible)
return;
if (scrollBar->type == SCROLLBAR_HORIZONTAL)
{
if (mouse.x != mouse.lastScrollX)
{
mouse.lastScrollX = mouse.x;
scrollX = mouse.lastScrollX - mouse.saveMouseX - scrollBar->x;
if (scrollBar->thumbType == SCROLLBAR_THUMB_NOFLAT)
{
assert(scrollBar->w >= 16);
dTmp = scrollX * (scrollBar->w / (double)(scrollBar->w - scrollBar->thumbW));
scrollX = (int32_t)(dTmp + 0.5);
}
assert(scrollBar->w > 0);
scrollX = CLAMP(scrollX, 0, scrollBar->w);
length = scrollBar->w + (scrollBar->realThumbLength - scrollBar->thumbW);
if (length < 1)
length = 1;
dTmp = ((double)scrollX * scrollBar->end) / length;
scrollX = (int32_t)(dTmp + 0.5);
setScrollBarPos(mouse.lastUsedObjectID, scrollX, true);
if (mouse.lastUsedObjectID != OBJECT_ID_NONE) // this can change in the callback in setScrollBarPos()
drawScrollBar(mouse.lastUsedObjectID);
}
}
else
{
if (mouse.y != mouse.lastScrollY)
{
mouse.lastScrollY = mouse.y;
scrollY = mouse.lastScrollY - mouse.saveMouseY - scrollBar->y;
assert(scrollBar->h > 0);
scrollY = CLAMP(scrollY, 0, scrollBar->h);
length = scrollBar->h + (scrollBar->realThumbLength - scrollBar->thumbH);
if (length < 1)
length = 1;
dTmp = ((double)scrollY * scrollBar->end) / length;
scrollY = (int32_t)(dTmp + 0.5);
setScrollBarPos(mouse.lastUsedObjectID, scrollY, true);
if (mouse.lastUsedObjectID != OBJECT_ID_NONE) // this can change in the callback in setScrollBarPos()
drawScrollBar(mouse.lastUsedObjectID);
}
}
}
void initializeScrollBars(void)
{
for (int32_t i = 0; i < NUM_SCROLLBARS; i++)
{
scrollBars[i].oldEnd = 0xFFFFFFFF;
scrollBars[i].oldPage = 0xFFFFFFFF;
scrollBars[i].oldPos = 0xFFFFFFFF;
}
// pattern editor
setScrollBarPageLength(SB_CHAN_SCROLL, 8);
setScrollBarEnd(SB_CHAN_SCROLL, 8);
// position editor
setScrollBarPageLength(SB_POS_ED, 5);
setScrollBarEnd(SB_POS_ED, 5);
// instrument switcher
setScrollBarPageLength(SB_SAMPLE_LIST, 5);
setScrollBarEnd(SB_SAMPLE_LIST, 16);
// help screen
setScrollBarPageLength(SB_HELP_SCROLL, 15);
setScrollBarEnd(SB_HELP_SCROLL, 1);
// config screen
setScrollBarPageLength(SB_AMP_SCROLL, 1);
setScrollBarEnd(SB_AMP_SCROLL, 31);
setScrollBarPageLength(SB_MASTERVOL_SCROLL, 1);
setScrollBarEnd(SB_MASTERVOL_SCROLL, 256);
setScrollBarPageLength(SB_PAL_R, 1);
setScrollBarEnd(SB_PAL_R, 63);
setScrollBarPageLength(SB_PAL_G, 1);
setScrollBarEnd(SB_PAL_G, 63);
setScrollBarPageLength(SB_PAL_B, 1);
setScrollBarEnd(SB_PAL_B, 63);
setScrollBarPageLength(SB_PAL_CONTRAST, 1);
setScrollBarEnd(SB_PAL_CONTRAST, 100);
setScrollBarPageLength(SB_MIDI_SENS, 1);
setScrollBarEnd(SB_MIDI_SENS, 200);
setScrollBarPageLength(SB_AUDIO_OUTPUT_SCROLL, 6);
setScrollBarEnd(SB_AUDIO_OUTPUT_SCROLL, 1);
setScrollBarPageLength(SB_AUDIO_INPUT_SCROLL, 4);
setScrollBarEnd(SB_AUDIO_INPUT_SCROLL, 1);
#ifdef HAS_MIDI
setScrollBarPageLength(SB_MIDI_INPUT_SCROLL, 15);
setScrollBarEnd(SB_MIDI_INPUT_SCROLL, 1);
#endif
// disk op.
setScrollBarPageLength(SB_DISKOP_LIST, DISKOP_ENTRY_NUM);
setScrollBarEnd(SB_DISKOP_LIST, 1);
// instrument editor
setScrollBarPageLength(SB_INST_VOL, 1);
setScrollBarEnd(SB_INST_VOL, 64);
setScrollBarPageLength(SB_INST_PAN, 1);
setScrollBarEnd(SB_INST_PAN, 255);
setScrollBarPageLength(SB_INST_FTUNE, 1);
setScrollBarEnd(SB_INST_FTUNE, 255);
setScrollBarPageLength(SB_INST_FADEOUT, 1);
setScrollBarEnd(SB_INST_FADEOUT, 0xFFF);
setScrollBarPageLength(SB_INST_VIBSPEED, 1);
setScrollBarEnd(SB_INST_VIBSPEED, 0x3F);
setScrollBarPageLength(SB_INST_VIBDEPTH, 1);
setScrollBarEnd(SB_INST_VIBDEPTH, 0xF);
setScrollBarPageLength(SB_INST_VIBSWEEP, 1);
setScrollBarEnd(SB_INST_VIBSWEEP, 0xFF);
// instrument editor extension
setScrollBarPageLength(SB_INST_EXT_MIDI_CH, 1);
setScrollBarEnd(SB_INST_EXT_MIDI_CH, 15);
setScrollBarPageLength(SB_INST_EXT_MIDI_PRG, 1);
setScrollBarEnd(SB_INST_EXT_MIDI_PRG, 127);
setScrollBarPageLength(SB_INST_EXT_MIDI_BEND, 1);
setScrollBarEnd(SB_INST_EXT_MIDI_BEND, 36);
}