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Copy pathPanel.c
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405 lines (351 loc) · 10.2 KB
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#include "Prototypes.h"
//#needs Object RichString Display
#include <math.h>
#include <sys/param.h>
#include <stdbool.h>
/*{
typedef enum HandlerResult_ {
HANDLED,
IGNORED,
BREAK_LOOP
} HandlerResult;
typedef HandlerResult(*Method_Panel_eventHandler)(Panel*, int);
struct PanelClass_ {
ObjectClass super;
};
struct Panel_ {
Object super;
int x, y, w, h;
List* items;
int selected;
int scrollV, scrollH;
int oldSelected;
bool needsRedraw;
RichString header;
bool highlightBar;
int cursorX;
int displaying;
int color;
bool focus;
Method_Panel_eventHandler eventHandler;
};
extern PanelClass PanelType;
}*/
PanelClass PanelType = {
.super = {
.size = sizeof(Panel),
.display = NULL,
.equals = Object_equals,
.delete = Panel_delete
}
};
Panel* Panel_new(int x, int y, int w, int h, int color, ListItemClass* class, bool owner, void* data) {
Panel* this = Alloc(Panel);
Panel_init(this, x, y, w, h, color, class, owner, data);
return this;
}
void Panel_delete(Object* cast) {
Panel* this = (Panel*)cast;
RichString_end(this->header);
Panel_done(this);
free(this);
}
void Panel_init(Panel* this, int x, int y, int w, int h, int color, ListItemClass* class, bool owner, void* data) {
this->x = x;
this->y = y;
this->w = w;
this->h = h;
this->color = color;
this->eventHandler = NULL;
this->items = List_new(class, data);
this->scrollV = 0;
this->scrollH = 0;
this->selected = 0;
this->oldSelected = 0;
this->needsRedraw = true;
this->highlightBar = false;
this->cursorX = 0;
this->displaying = 0;
this->focus = true;
RichString_beginAllocated(this->header);
}
void Panel_done(Panel* this) {
assert (this != NULL);
List_delete(this->items);
}
void Panel_setFocus(Panel* this, bool focus) {
this->focus = focus;
}
void Panel_setHeader(Panel* this, RichString header) {
assert (this != NULL);
this->header = header;
this->needsRedraw = true;
}
void Panel_move(Panel* this, int x, int y) {
assert (this != NULL);
this->x = x;
this->y = y;
this->needsRedraw = true;
}
void Panel_resize(Panel* this, int w, int h) {
assert (this != NULL);
if (RichString_sizeVal(this->header) > 0)
h--;
this->w = w;
this->h = h;
this->needsRedraw = true;
}
void Panel_prune(Panel* this) {
assert (this != NULL);
List_prune(this->items);
this->scrollV = 0;
this->selected = 0;
this->oldSelected = 0;
this->needsRedraw = true;
}
void Panel_add(Panel* this, ListItem* l) {
assert (this != NULL);
List_add(this->items, l);
this->needsRedraw = true;
}
void Panel_set(Panel* this, int i, ListItem* l) {
assert (this != NULL);
List_set(this->items, i, l);
}
ListItem* Panel_get(Panel* this, int i) {
assert (this != NULL);
return List_get(this->items, i);
}
Object* Panel_remove(Panel* this, int i) {
assert (this != NULL);
this->needsRedraw = true;
Object* removed = NULL;
List_remove(this->items, i);
if (this->selected > 0 && this->selected >= List_size(this->items))
this->selected--;
return removed;
}
ListItem* Panel_getSelected(Panel* this) {
assert (this != NULL);
return List_get(this->items, this->selected);
}
/*
void Panel_moveSelectedUp(Panel* this) {
assert (this != NULL);
List_moveUp(this->items, this->selected);
if (this->selected > 0)
this->selected--;
}
void Panel_moveSelectedDown(Panel* this) {
assert (this != NULL);
List_moveDown(this->items, this->selected);
if (this->selected + 1 < List_size(this->items))
this->selected++;
}
*/
int Panel_getSelectedIndex(Panel* this) {
assert (this != NULL);
return this->selected;
}
int Panel_size(Panel* this) {
assert (this != NULL);
return List_size(this->items);
}
void Panel_setSelected(Panel* this, int selected) {
assert (this != NULL);
selected = MAX(0, MIN(List_size(this->items) - 1, selected));
this->selected = selected;
}
void Panel_draw(Panel* this) {
assert (this != NULL);
int cursorY = 0;
int first, last;
int itemCount = List_size(this->items);
int scrollH = this->scrollH;
int y = this->y; int x = this->x;
int w = this->w; int h = this->h;
first = this->scrollV;
if (h > itemCount) {
last = itemCount;
} else {
last = MIN(itemCount, this->scrollV + h);
}
if (this->selected < first) {
first = this->selected;
this->scrollV = first;
this->needsRedraw = true;
}
if (this->selected >= last) {
last = MIN(itemCount, this->selected + 1);
first = MAX(0, last - h);
this->scrollV = first;
this->needsRedraw = true;
}
assert(first >= 0);
assert(last <= itemCount);
int headerLen = RichString_sizeVal(this->header);
if (headerLen > 0) {
Display_attrset(CRT_colors[HeaderColor]);
Display_mvhline(y, x, ' ', w);
if (scrollH < headerLen) {
assert(headerLen > 0);
Display_writeChstrAtn(y, x, RichString_at(this->header, scrollH),
MIN(headerLen - scrollH, w));
}
y++;
}
scrollH = 0;
int highlight;
if (this->focus) {
highlight = CRT_colors[SelectionColor];
} else {
highlight = CRT_colors[UnfocusedSelectionColor];
}
Display_attrset(this->color);
if (this->needsRedraw) {
for(int i = first, j = 0; j < h && i < last; i++, j++) {
Object* itemObj = (Object*) List_get(this->items, i);
assert(itemObj);
RichString_begin(itemRef);
this->displaying = i;
Msg(Object, display, itemObj, &itemRef);
int amt = MIN(RichString_sizeVal(itemRef) - scrollH, w);
if (i == this->selected) {
if (this->highlightBar) {
Display_attrset(highlight);
RichString_setAttr(&itemRef, highlight);
}
cursorY = y + j;
Display_mvhline(cursorY, x+amt, ' ', w-amt);
if (amt > 0)
Display_writeChstrAtn(y+j, x+0, RichString_at(itemRef, scrollH), amt);
if (this->highlightBar)
Display_attrset(this->color);
} else {
Display_mvhline(y+j, x+amt, ' ', w-amt);
if (amt > 0)
Display_writeChstrAtn(y+j, x+0, RichString_at(itemRef, scrollH), amt);
}
RichString_end(itemRef);
}
for (int i = y + (last - first); i < y + h; i++)
Display_mvhline(i, x+0, ' ', w);
/* paint scrollbar */
{
float step = (float)h / (float) itemCount ;
int handleHeight = ceil(step * (float)h);
int startAt = step * (float)this->scrollV;
Color bar = CRT_colors[ScrollBarColor];
Color handle = CRT_colors[ScrollHandleColor];
for (int i = 0; i < h; i++) {
char ch;
if (i >= startAt && handleHeight) {
Display_attrset(handle);
ch = CRT_scrollHandle;
handleHeight--;
} else {
Display_attrset(bar);
ch = CRT_scrollBar;
}
Display_writeChAt(y + i, w, ch);
}
Display_attrset(this->color);
}
this->needsRedraw = false;
} else {
Object* oldObj = (Object*) List_get(this->items, this->oldSelected);
RichString_begin(oldRef);
this->displaying = this->oldSelected;
Msg(Object, display, oldObj, &oldRef);
Object* newObj = (Object*) List_get(this->items, this->selected);
RichString_begin(newRef);
this->displaying = this->selected;
Msg(Object, display, newObj, &newRef);
Display_mvhline(y+ this->oldSelected - this->scrollV, x+0, ' ', w);
int oldLen = RichString_sizeVal(oldRef);
if (scrollH < oldLen)
Display_writeChstrAtn(y+ this->oldSelected - this->scrollV, x+0, RichString_at(oldRef, scrollH), MIN(oldLen - scrollH, w));
if (this->highlightBar)
Display_attrset(highlight);
cursorY = y+this->selected - this->scrollV;
Display_mvhline(cursorY, x+0, ' ', w);
if (this->highlightBar)
RichString_setAttr(&newRef, highlight);
int newLen = RichString_sizeVal(newRef);
if (scrollH < newLen)
Display_writeChstrAtn(y+this->selected - this->scrollV, x+0, RichString_at(newRef, scrollH), MIN(newLen - scrollH, w));
if (this->highlightBar)
Display_attrset(this->color);
RichString_end(oldRef);
RichString_end(newRef);
}
this->oldSelected = this->selected;
Display_move(cursorY, this->cursorX);
}
bool Panel_onKey(Panel* this, int key) {
assert (this != NULL);
switch (key) {
case KEY_DOWN:
if (this->selected + 1 < List_size(this->items))
this->selected++;
return true;
case KEY_UP:
if (this->selected > 0)
this->selected--;
return true;
case KEY_C_DOWN:
if (this->selected + 1 < List_size(this->items)) {
this->selected++;
if (this->scrollV < List_size(this->items) - this->h) {
this->scrollV++;
this->needsRedraw = true;
}
}
return true;
case KEY_C_UP:
if (this->selected > 0) {
this->selected--;
if (this->scrollV > 0) {
this->scrollV--;
this->needsRedraw = true;
}
}
return true;
case KEY_LEFT:
if (this->scrollH > 0) {
this->scrollH -= 5;
this->needsRedraw = true;
}
return true;
case KEY_RIGHT:
this->scrollH += 5;
this->needsRedraw = true;
return true;
case KEY_PPAGE:
this->selected -= (this->h - 1);
this->scrollV -= (this->h - 1);
if (this->selected < 0)
this->selected = 0;
if (this->scrollV < 0)
this->scrollV = 0;
this->needsRedraw = true;
return true;
case KEY_NPAGE:
this->selected += (this->h - 1);
int size = List_size(this->items);
if (this->selected >= size)
this->selected = size - 1;
this->scrollV += (this->h - 1);
if (this->scrollV >= MAX(0, size - this->h))
this->scrollV = MAX(0, size - this->h - 1);
this->needsRedraw = true;
return true;
case KEY_HOME:
this->selected = 0;
return true;
case KEY_END:
this->selected = List_size(this->items) - 1;
return true;
}
return false;
}