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// 10 march 2018
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#include <stdio.h>
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#include <string.h>
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#include "../../ui.h"
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uiWindow *mainwin;
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uiArea *area;
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uiAreaHandler handler;
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uiFontButton *fontButton;
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uiCombobox *alignment;
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uiCheckbox *systemFont;
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uiAttributedString *attrstr;
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static void appendWithAttribute(const char *what, uiAttribute *attr, uiAttribute *attr2)
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{
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size_t start, end;
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start = uiAttributedStringLen(attrstr);
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end = start + strlen(what);
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uiAttributedStringAppendUnattributed(attrstr, what);
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uiAttributedStringSetAttribute(attrstr, attr, start, end);
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if (attr2 != NULL)
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uiAttributedStringSetAttribute(attrstr, attr2, start, end);
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}
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static void makeAttributedString(void)
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{
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uiAttribute *attr, *attr2;
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uiOpenTypeFeatures *otf;
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attrstr = uiNewAttributedString(
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"Drawing strings with libui is done with the uiAttributedString and uiDrawTextLayout objects.\n"
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"uiAttributedString lets you have a variety of attributes: ");
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attr = uiNewFamilyAttribute("Courier New");
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appendWithAttribute("font family", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewSizeAttribute(18);
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appendWithAttribute("font size", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewWeightAttribute(uiTextWeightBold);
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appendWithAttribute("font weight", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewItalicAttribute(uiTextItalicItalic);
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appendWithAttribute("font italicness", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewStretchAttribute(uiTextStretchCondensed);
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appendWithAttribute("font stretch", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewColorAttribute(0.75, 0.25, 0.5, 0.75);
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appendWithAttribute("text color", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewBackgroundAttribute(0.5, 0.5, 0.25, 0.5);
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appendWithAttribute("text background color", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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attr = uiNewUnderlineAttribute(uiUnderlineSingle);
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appendWithAttribute("underline style", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, ", ");
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uiAttributedStringAppendUnattributed(attrstr, "and ");
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attr = uiNewUnderlineAttribute(uiUnderlineDouble);
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attr2 = uiNewUnderlineColorAttribute(uiUnderlineColorCustom, 1.0, 0.0, 0.5, 1.0);
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appendWithAttribute("underline color", attr, attr2);
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uiAttributedStringAppendUnattributed(attrstr, ". ");
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uiAttributedStringAppendUnattributed(attrstr, "Furthermore, there are attributes allowing for ");
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attr = uiNewUnderlineAttribute(uiUnderlineSuggestion);
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attr2 = uiNewUnderlineColorAttribute(uiUnderlineColorSpelling, 0, 0, 0, 0);
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appendWithAttribute("special underlines for indicating spelling errors", attr, attr2);
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uiAttributedStringAppendUnattributed(attrstr, " (and other types of errors) ");
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uiAttributedStringAppendUnattributed(attrstr, "and control over OpenType features such as ligatures (for instance, ");
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otf = uiNewOpenTypeFeatures();
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uiOpenTypeFeaturesAdd(otf, 'l', 'i', 'g', 'a', 0);
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attr = uiNewFeaturesAttribute(otf);
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appendWithAttribute("afford", attr, NULL);
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uiAttributedStringAppendUnattributed(attrstr, " vs. ");
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uiOpenTypeFeaturesAdd(otf, 'l', 'i', 'g', 'a', 1);
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attr = uiNewFeaturesAttribute(otf);
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appendWithAttribute("afford", attr, NULL);
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uiFreeOpenTypeFeatures(otf);
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uiAttributedStringAppendUnattributed(attrstr, ").\n");
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uiAttributedStringAppendUnattributed(attrstr, "Use the controls opposite to the text to control properties of the text.");
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}
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static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
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{
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uiDrawTextLayout *textLayout;
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uiFontDescriptor defaultFont;
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uiDrawTextLayoutParams params;
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int useSystemFont = uiCheckboxChecked(systemFont);
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params.String = attrstr;
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if (useSystemFont)
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uiLoadControlFont(&defaultFont);
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else
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uiFontButtonFont(fontButton, &defaultFont);
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params.DefaultFont = &defaultFont;
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params.Width = p->AreaWidth;
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params.Align = (uiDrawTextAlign) uiComboboxSelected(alignment);
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textLayout = uiDrawNewTextLayout(¶ms);
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uiDrawText(p->Context, textLayout, 0, 0);
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uiDrawFreeTextLayout(textLayout);
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//TODO RENAME?
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uiFreeFontButtonFont(&defaultFont);
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}
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static void handlerMouseEvent(uiAreaHandler *a, uiArea *area, uiAreaMouseEvent *e)
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{
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// do nothing
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}
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static void handlerMouseCrossed(uiAreaHandler *ah, uiArea *a, int left)
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{
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// do nothing
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}
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static void handlerDragBroken(uiAreaHandler *ah, uiArea *a)
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{
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// do nothing
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}
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static int handlerKeyEvent(uiAreaHandler *ah, uiArea *a, uiAreaKeyEvent *e)
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{
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// reject all keys
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return 0;
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}
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static void onFontChanged(uiFontButton *b, void *data)
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{
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uiAreaQueueRedrawAll(area);
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}
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static void onComboboxSelected(uiCombobox *b, void *data)
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{
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uiAreaQueueRedrawAll(area);
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}
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static void onCheckboxToggled(uiCheckbox *b, void *data)
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{
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uiAreaQueueRedrawAll(area);
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}
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static int onClosing(uiWindow *w, void *data)
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{
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uiControlDestroy(uiControl(mainwin));
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uiQuit();
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return 0;
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}
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static int shouldQuit(void *data)
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{
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uiControlDestroy(uiControl(mainwin));
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return 1;
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}
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int main(void)
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{
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uiInitOptions o;
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const char *err;
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uiBox *hbox, *vbox;
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uiForm *form;
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handler.Draw = handlerDraw;
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handler.MouseEvent = handlerMouseEvent;
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handler.MouseCrossed = handlerMouseCrossed;
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handler.DragBroken = handlerDragBroken;
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handler.KeyEvent = handlerKeyEvent;
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memset(&o, 0, sizeof (uiInitOptions));
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err = uiInit(&o);
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if (err != NULL) {
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fprintf(stderr, "error initializing ui: %s\n", err);
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uiFreeInitError(err);
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return 1;
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}
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uiOnShouldQuit(shouldQuit, NULL);
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makeAttributedString();
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mainwin = uiNewWindow("libui Text-Drawing Example", 640, 480, 1);
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uiWindowSetMargined(mainwin, 1);
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uiWindowOnClosing(mainwin, onClosing, NULL);
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hbox = uiNewHorizontalBox();
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uiBoxSetPadded(hbox, 1);
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uiWindowSetChild(mainwin, uiControl(hbox));
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vbox = uiNewVerticalBox();
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uiBoxSetPadded(vbox, 1);
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uiBoxAppend(hbox, uiControl(vbox), 0);
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fontButton = uiNewFontButton();
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uiFontButtonOnChanged(fontButton, onFontChanged, NULL);
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uiBoxAppend(vbox, uiControl(fontButton), 0);
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form = uiNewForm();
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uiFormSetPadded(form, 1);
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// TODO on OS X if this is set to 1 then the window can't resize; does the form not have the concept of stretchy trailing space?
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uiBoxAppend(vbox, uiControl(form), 0);
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alignment = uiNewCombobox();
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// note that the items match with the values of the uiDrawTextAlign values
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uiComboboxAppend(alignment, "Left");
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uiComboboxAppend(alignment, "Center");
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uiComboboxAppend(alignment, "Right");
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uiComboboxSetSelected(alignment, 0); // start with left alignment
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uiComboboxOnSelected(alignment, onComboboxSelected, NULL);
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uiFormAppend(form, "Alignment", uiControl(alignment), 0);
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systemFont = uiNewCheckbox("");
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uiCheckboxOnToggled(systemFont, onCheckboxToggled, NULL);
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uiFormAppend(form, "System Font", uiControl(systemFont), 0);
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area = uiNewArea(&handler);
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uiBoxAppend(hbox, uiControl(area), 1);
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uiControlShow(uiControl(mainwin));
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uiMain();
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uiFreeAttributedString(attrstr);
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uiUninit();
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return 0;
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}
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