warzone2100/lib/betawidget/textEntry.c

155 lines
3.1 KiB
C

#include <string.h>
#include "textEntry.h"
static textEntryVtbl vtbl;
// Default size of the text buffer
static const int defautSize = 128;
const classInfo textEntryClassInfo =
{
&widgetClassInfo,
"textEntry"
};
textEntry *textEntryCreate(const char *id)
{
textEntry *instance = malloc(sizeof(textEntry));
if (instance == NULL)
{
return NULL;
}
// Call the constructor
textEntryInit(instance, id);
// Return the new object
return instance;
}
static void textEntryInitVtbl(textEntry *self)
{
static bool initialised = false;
if (!initialised)
{
// Copy our parents vtable into ours
vtbl.widgetVtbl = *(WIDGET(self)->vtbl);
// Overload the destroy method
vtbl.widgetVtbl.destroy = textEntryDestroyImpl;
// Draw method
vtbl.widgetVtbl.doDraw = textEntryDoDrawImpl;
initialised = true;
}
// Replace our parents vtable with our own
WIDGET(self)->vtbl = &vtbl.widgetVtbl;
// Set our vtable
self->vtbl = &vtbl;
}
void textEntryInit(textEntry *self, const char *id)
{
// Init our parent
widgetInit(WIDGET(self), id);
// Prepare our vtable
textEntryInitVtbl(self);
// Set our type
WIDGET(self)->classInfo = &textEntryClassInfo;
// Allocate a modestly sized text buffer
self->text = calloc(defautSize, 1);
self->textSize = defautSize;
// On account of there being no text, all of these are 0
self->textHead = 0;
self->insertPosition = 0;
self->renderLeftOffset = 0;
}
void textEntryDestroyImpl(widget *self)
{
// Free the text buffer
free(TEXT_ENTRY(self)->text);
// Call our parents destructor
widgetDestroyImpl(self);
}
void textEntryDoDrawImpl(widget *self)
{
// Draw our frame
textEntryDoDrawFrame(TEXT_ENTRY(self));
textEntryDoDrawText(TEXT_ENTRY(self));
}
void textEntryDoDrawFrame(textEntry *self)
{
cairo_t *cr = WIDGET(self)->cr;
// Lets keep it simple
cairo_rectangle(cr, 0, 0, WIDGET(self)->size.x, WIDGET(self)->size.y);
cairo_set_source_rgba(cr, 0.0, 1.0, 1.0, 0.4);
cairo_fill_preserve(cr);
// Black stroke
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_set_line_width(cr, 2);
cairo_stroke(cr);
}
void textEntryDoDrawText(textEntry *self)
{
cairo_t *cr = WIDGET(self)->cr;
// Set the render left offset
cairo_translate(cr, -self->renderLeftOffset, 0);
// Draw the text
cairo_move_to(cr, 0, WIDGET(self)->size.y);
cairo_select_font_face(cr, "Sans", CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 25);
cairo_show_text(cr, self->text);
// Restore the offset
cairo_translate(cr, self->renderLeftOffset, 0);
}
const char *textEntryGetContents(textEntry *self)
{
return self->text;
}
bool textEntrySetContents(textEntry *self, const char *contents)
{
// Free the current contents
free(self->text);
// Copy the new contents
self->text = strdup(contents);
// TODO: Check for NULL and return false
// Update the size information
self->textHead = self->textSize = strlen(contents);
// Place the caret at the start of the string
self->insertPosition = 0;
// Since the insert position is the far left, the render offset is 0
self->renderLeftOffset = 0;
return true;
}