Started a new example for showing off OpenType features. This just lays out the UI and draws the string.
This commit is contained in:
Pietro Gagliardi
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39530a0a2e
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8728dcb5c0
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@ -18,7 +18,7 @@ libui uses K&R C formatting rules for overall code structure: spaces after keywo
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Use hard tabs, NOT spaces, for indentation. I use a proportional-width font and my text editor doesn't set tabs to a multiple of the space width, so I *will* be able to tell. If you use a fixed-width font, I suggest setting a tab width of 4 spaces per tab, but don't put diagrams in comments with hard tabs, because not everyone does this.
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Expressions should have a spce around binary operators, and use parentheses where it would help humans gather the meaning of an expression, regardless of whether a computer could tell what is correct.
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Expressions should have a space around binary operators, and use parentheses where it would help humans gather the meaning of an expression, regardless of whether a computer could tell what is correct.
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When breaking expressions into multiple lines, always break *after* an operator, such as `,` or `&&`.
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@ -40,6 +40,10 @@ Acronyms should **NOT** be mixed-case. `http` for the first word in a camel-case
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(TODO I am writing an API documentation tool; once that becomes stable enough I can talk about documenting libui properly. You'll see vestiges of it throughout ui.h, though.)
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### Other commenting
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(TODO write this part)
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### Compatibility
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libui takes backward compatibility seriously. Your code should not break the current compatibility requirements. All platforms provide a series of macros, defined in the various `uipriv_*.h` files (or `winapi.hpp` on Windows), that specify the minimum required version. If you find yourself needing to remove these or ignore resultant warnings or errors, you're probably breaking compatibility.
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@ -6,7 +6,7 @@ This README is being written.<br>
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## Announcements
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* **TODO**
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* Introduced an all-new formatted text API that allows you to process formatted text in ways that the old API wouldn't allow. You can read on the whole API [here](TODO).
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* Introduced an all-new formatted text API that allows you to process formatted text in ways that the old API wouldn't allow. You can read on the whole API [here](TODO). There are also two new examples for this new api: `drawtext` (which shows the whole API at a glance) and `opentype` (which focuses on OpenType features).
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* Also introduced a formal set of contribution guidelines, see `CONTRIBUTING.md` for details.
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* **27 November 2016**
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@ -42,9 +42,17 @@ _add_example(drawtext
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target_include_directories(drawtext
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PRIVATE drawtext)
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_add_example(opentype
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opentype/main.c
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${_EXAMPLE_RESOURCES_RC}
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)
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target_include_directories(opentype
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PRIVATE opentype)
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add_custom_target(examples
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DEPENDS
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controlgallery
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histogram
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cpp-multithread
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drawtext)
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drawtext
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opentype)
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@ -0,0 +1,173 @@
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// 10 june 2017
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <time.h>
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#include "../../ui.h"
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uiWindow *mainwin;
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uiFontButton *fontButton;
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uiEntry *textEntry;
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uiCheckbox *nullFeatures;
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uiArea *area;
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uiAttributedString *attrstr = NULL;
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static void remakeAttrStr(void)
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{
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char *text;
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uiOpenTypeFeatures *otf;
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uiAttributeSpec spec;
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if (attrstr != NULL)
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uiFreeAttributedString(attrstr);
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text = uiEntryText(textEntry);
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attrstr = uiNewAttributedString(text);
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uiFreeText(text);
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if (!uiCheckboxChecked(nullFeatures)) {
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otf = uiNewOpenTypeFeatures();
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// TODO
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spec.Type = uiAttributeFeatures;
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spec.Features = otf;
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uiAttributedStringSetAttribute(attrstr, &spec,
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0, uiAttributedStringLen(attrstr));
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// and uiAttributedString copied otf
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uiFreeOpenTypeFeatures(otf);
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}
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uiAreaQueueRedrawAll(area);
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}
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// TODO make a variable of main()? in all programs?
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static uiAreaHandler handler;
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static void handlerDraw(uiAreaHandler *a, uiArea *area, uiAreaDrawParams *p)
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{
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uiDrawTextLayout *layout;
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uiDrawTextLayoutParams lp;
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uiDrawFontDescriptor desc;
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memset(&lp, 0, sizeof (uiDrawTextLayoutParams));
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lp.String = attrstr;
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uiFontButtonFont(fontButton, &desc);
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lp.DefaultFont = &desc;
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lp.Width = p->AreaWidth;
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lp.Align = uiDrawTextAlignLeft;
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layout = uiDrawNewTextLayout(&lp);
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uiDrawText(p->Context, layout, 0, 0);
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uiDrawFreeTextLayout(layout);
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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 int onClosing(uiWindow *w, void *data)
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{
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// TODO change the others to be like this? (the others destroy here rather than later)
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// TODO move this below uiQuit()?
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uiControlHide(uiControl(w));
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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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uiGrid *grid;
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uiBox *vbox;
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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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// TODO 800x600? the size of the GTK+ example?
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mainwin = uiNewWindow("libui OpenType Features Example", 640, 480, 1);
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uiWindowSetMargined(mainwin, 1);
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uiWindowOnClosing(mainwin, onClosing, NULL);
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grid = uiNewGrid();
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uiGridSetPadded(grid, 1);
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uiWindowSetChild(mainwin, uiControl(grid));
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fontButton = uiNewFontButton();
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uiGridAppend(grid, uiControl(fontButton),
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0, 0, 1, 1,
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// TODO are these Y values correct?
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0, uiAlignFill, 0, uiAlignCenter);
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textEntry = uiNewEntry();
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uiEntrySetText(textEntry, "afford afire aflight");
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uiGridAppend(grid, uiControl(textEntry),
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1, 0, 1, 1,
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// TODO are these Y values correct too?
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// TODO add a baseline align? or a form align?
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1, uiAlignFill, 0, uiAlignCenter);
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vbox = uiNewVerticalBox();
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uiBoxSetPadded(vbox, 1);
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uiGridAppend(grid, uiControl(vbox),
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0, 1, 1, 1,
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0, uiAlignFill, 1, uiAlignFill);
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nullFeatures = uiNewCheckbox("NULL uiOpenTypeFeatures");
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uiBoxAppend(vbox, uiControl(nullFeatures), 0);
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// TODO separator (if other stuff isn't a tab)
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// TODO other stuff
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area = uiNewArea(&handler);
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uiGridAppend(grid, uiControl(area),
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1, 1, 1, 1,
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1, uiAlignFill, 1, uiAlignFill);
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// and set up the initial draw
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remakeAttrStr();
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uiControlShow(uiControl(mainwin));
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uiMain();
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uiControlDestroy(uiControl(mainwin));
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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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